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[01/51] [partial] drill-site git commit: Cleaning up deleted content.
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-<div class="highlight"><pre><code class="language-text" data-lang="text">DRIVER=MapR Drill ODBC Driver;AdvancedProperties= {HandshakeTimeout=0;QueryTimeout=0; TimestampTZDisplayTimezone=utc;ExcludedSchemas=sys, INFORMATION_SCHEMA;[OS1] };Catalog=DRILL;Schema=hivestg; ConnectionType=Direct;Host=192.168.202.147;Port=31010
-</code></pre></div>
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-<div class="highlight"><pre><code class="language-text" data-lang="text">DRIVER=MapR Drill ODBC Driver;AdvancedProperties= {HandshakeTimeout=0;QueryTimeout=0; TimestampTZDisplayTimezone=utc;ExcludedSchemas=sys, INFORMATION_SCHEMA;};Catalog=DRILL;Schema=; ConnectionType=ZooKeeper;ZKQuorum=192.168.39.43:5181; ZKClusterID=drillbits1
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- <li class="toctree-l3"><a class="reference internal" href="/docs/kvgen/">KVGEN</a></li>
-
- <li class="toctree-l3"><a class="reference internal" href="/docs/repeated-count/">REPEATED_COUNT</a></li>
-
- <li class="toctree-l3"><a class="reference internal" href="/docs/repeated-contains/">REPEATED_CONTAINS</a></li>
-
- </ul>
-
-
-
- <li class="toctree-l2"><a class="reference internal" href="/docs/query-directory-functions/">Query Directory Functions</a></li>
-
-
-
- <li class="toctree-l2"><a href="javascript: void(0);">SQL Commands</a></li>
- <ul style="display: none">
-
- <li class="toctree-l3"><a class="reference internal" href="/docs/supported-sql-commands/">Supported SQL Commands</a></li>
-
- <li class="toctree-l3"><a class="reference internal" href="/docs/alter-session/">ALTER SESSION</a></li>
-
- <li class="toctree-l3"><a class="reference internal" href="/docs/alter-system/">ALTER SYSTEM</a></li>
-
- <li class="toctree-l3"><a class="reference internal" href="/docs/create-table-as-ctas/">CREATE TABLE AS (CTAS)</a></li>
-
- <li class="toctree-l3"><a class="reference internal" href="/docs/create-view/">CREATE VIEW</a></li>
-
- <li class="toctree-l3"><a class="reference internal" href="/docs/drop-view/">DROP VIEW</a></li>
-
- <li class="toctree-l3"><a class="reference internal" href="/docs/describe/">DESCRIBE</a></li>
-
- <li class="toctree-l3"><a class="reference internal" href="/docs/explain/">EXPLAIN</a></li>
-
- <li class="toctree-l3"><a class="reference internal" href="/docs/select/">SELECT</a></li>
-
- <li class="toctree-l3"><a class="reference internal" href="/docs/select-list/">SELECT List</a></li>
-
- <li class="toctree-l3"><a class="reference internal" href="/docs/from-clause/">FROM Clause</a></li>
-
- <li class="toctree-l3"><a class="reference internal" href="/docs/group-by-clause/">GROUP BY Clause</a></li>
-
- <li class="toctree-l3"><a class="reference internal" href="/docs/having-clause/">HAVING Clause</a></li>
-
- <li class="toctree-l3"><a class="reference internal" href="/docs/limit-clause/">LIMIT Clause</a></li>
-
- <li class="toctree-l3"><a class="reference internal" href="/docs/offset-clause/">OFFSET Clause</a></li>
-
- <li class="toctree-l3"><a class="reference internal" href="/docs/order-by-clause/">ORDER BY Clause</a></li>
-
- <li class="toctree-l3"><a class="reference internal" href="/docs/union-set-operator/">UNION Set Operator</a></li>
-
- <li class="toctree-l3"><a class="reference internal" href="/docs/where-clause/">WHERE Clause</a></li>
-
- <li class="toctree-l3"><a class="reference internal" href="/docs/with-clause/">WITH Clause</a></li>
-
- <li class="toctree-l3"><a class="reference internal" href="/docs/show-databases-and-show-schemas/">SHOW DATABASES and SHOW SCHEMAS</a></li>
-
- <li class="toctree-l3"><a class="reference internal" href="/docs/show-files/">SHOW FILES</a></li>
-
- <li class="toctree-l3"><a class="reference internal" href="/docs/show-tables/">SHOW TABLES</a></li>
-
- <li class="toctree-l3"><a class="reference internal" href="/docs/use/">USE</a></li>
-
- </ul>
-
-
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- <li class="toctree-l2"><a href="javascript: void(0);">SQL Conditional Expressions</a></li>
- <ul style="display: none">
-
- <li class="toctree-l3"><a class="reference internal" href="/docs/case/">CASE</a></li>
-
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-
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-
-
-
- <li class="toctree-l2"><a class="reference internal" href="/docs/sql-extensions/">SQL Extensions</a></li>
-
-
- </ul>
-
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- <li class="toctree-l1"><a href="javascript: void(0);">Data Sources and File Formats</a></li>
- <ul style="display: none">
-
-
- <li class="toctree-l2"><a class="reference internal" href="/docs/data-sources-and-file-formats-introduction/">Data Sources and File Formats Introduction</a></li>
-
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-
- <li class="toctree-l2"><a class="reference internal" href="/docs/hive-to-drill-data-type-mapping/">Hive-to-Drill Data Type Mapping</a></li>
-
-
-
- <li class="toctree-l2"><a class="reference internal" href="/docs/deploying-and-using-a-hive-udf/">Deploying and Using a Hive UDF</a></li>
-
-
-
- <li class="toctree-l2"><a class="reference internal" href="/docs/parquet-format/">Parquet Format</a></li>
-
-
-
- <li class="toctree-l2"><a class="reference internal" href="/docs/json-data-model/">JSON Data Model</a></li>
-
-
- </ul>
-
-
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- <li class="toctree-l1"><a href="javascript: void(0);">Develop Custom Functions</a></li>
- <ul style="display: none">
-
-
- <li class="toctree-l2"><a class="reference internal" href="/docs/develop-custom-functions-introduction/">Develop Custom Functions Introduction</a></li>
-
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- <li class="toctree-l2"><a class="reference internal" href="/docs/develop-a-simple-function/">Develop a Simple Function</a></li>
-
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- <li class="toctree-l2"><a class="reference internal" href="/docs/developing-an-aggregate-function/">Developing an Aggregate Function</a></li>
-
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- <li class="toctree-l2"><a class="reference internal" href="/docs/adding-custom-functions-to-drill/">Adding Custom Functions to Drill</a></li>
-
-
-
- <li class="toctree-l2"><a class="reference internal" href="/docs/using-custom-functions-in-queries/">Using Custom Functions in Queries</a></li>
-
-
-
- <li class="toctree-l2"><a class="reference internal" href="/docs/custom-function-interfaces/">Custom Function Interfaces</a></li>
-
-
- </ul>
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- <ul style="display: none">
-
- <li class="toctree-l3"><a class="reference internal" href="/docs/apache-drill-contribution-guidelines/">Apache Drill Contribution Guidelines</a></li>
-
- <li class="toctree-l3"><a class="reference internal" href="/docs/apache-drill-contribution-ideas/">Apache Drill Contribution Ideas</a></li>
-
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- <ul style="display: none">
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- <li><a href="/docs/">Docs</a></li>
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- <li><a href="/docs/odbc-jdbc-interfaces/">ODBC/JDBC Interfaces</a></li>
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- <li><a href="/docs/using-odbc-on-windows/">Using ODBC on Windows</a></li>
-
- <li>Configuring Connections on Windows</li>
-</nav>
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- <div class="main-content">
-
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- <a class="edit-link" href="https://github.com/apache/drill/blob/gh-pages/_docs/odbc-jdbc-interfaces/using-odbc-on-windows/020-configuring-connections-on-windows.md" target="_blank"><i class="fa fa-pencil-square-o"></i></a>
-
-
- <div class="int_title left">
- <h1>Configuring Connections on Windows</h1>
-
- </div>
-
- <link href="/css/docpage.css" rel="stylesheet" type="text/css">
-
- <div class="int_text" align="left">
-
- <p>Complete one of the following steps to create an ODBC connection on Windows to Drill data
-sources:</p>
-
-<ul>
-<li>Create a Data Source Name</li>
-<li>Create an ODBC Connection String</li>
-</ul>
-
-<p><strong>Prerequisite:</strong> An Apache Drill installation must be <a href="/docs/connect-a-data-source-introduction/">configured</a> to access the data sources that you want to connect to. For information about how to install Apache Drill, see <a href="/docs/install-drill">Install Drill</a>.</p>
-
-<h2 id="create-a-data-source-name-(dsn)">Create a Data Source Name (DSN)</h2>
-
-<p>Create a DSN that an application can use to connect to Drill data sources. If
-you want to create a DSN for a 32-bit application, you must use the 32-bit
-version of the ODBC Administrator to create the DSN.</p>
-
-<ol>
-<li><p>To launch the ODBC Administrator, click <strong>Start > All Programs > MapR Drill ODBC Driver 1.0 (32|64-bit) > (32|64-bit) ODBC Administrator</strong>.<br>
-The ODBC Data Source Administrator window appears.</p>
-
-<p>To launch the 32-bit version of the ODBC driver on a 64-bit machine, run:
-<code>C:\WINDOWS\SysWOW64\odbcad32.exe</code>.</p></li>
-<li><p>Click the <strong>System DSN</strong> tab to create a system DSN or click the <strong>User DSN</strong> tab to create a user DSN. A system DSN is available for all users who log in to the machine. A user DSN is available to the user who creates the DSN.</p></li>
-<li><p>Click <strong>Add</strong>.</p></li>
-<li><p>Select <strong>MapR Drill ODBC Driver</strong> and click <strong>Finish</strong>.<br>
- The <em>MapR Drill ODBC Driver DSN Setup</em> window appears.</p></li>
-<li><p>In the <strong>Data Source Name</strong> field, enter a name for the DSN,</p></li>
-<li><p>Optionally, enter a description of the DSN in the Description field.</p></li>
-<li><p>In the Connection Type section, select a connection type and enter the associated connection details:</p>
-
-<p><table style='table-layout:fixed;width:100%'><tbody><tr><th>Connection Type</th><th >Properties</th><th >Descriptions</th></tr><tr><td rowspan="2" valign="top" width="10%">Zookeeper Quorum</td><td valign="top" style='width: 100px;'>Quorum</td><td valign="top" style='width: 400px;'>A comma-separated list of servers in a Zookeeper cluster.For example, <ip_zookeepernode1>:5181,<ip_zookeepernode21>:5181,\u2026</td></tr><tr><td valign="top">ClusterID</td><td valign="top">Name of the drillbit cluster. The default is drillbits1. You may need to specify a different value if the cluster ID was changed in the drill-override.conf file.</td></tr><tr><td colspan="1" valign="top">Direct to Drillbit</td><td colspan="1" valign="top"> </td><td colspan="1" valign="top">Provide the IP address or host name of the Drill server and the port number that that the Drill server is listening on. The port number defaults to 31010. You may need to specify a different value if the port number was ch
anged in the drill-override.conf file.</td></tr></tbody></table>
- For information on selecting the appropriate connection type, see <a href="/docs/configuring-connections-on-windows/#connection-type">Connection Types</a>.</p></li>
-<li><p>In the <strong>Default Schema</strong> field, select the default schema that you want to connect to.
- For more information about the schemas that appear in this list, see Schemas.</p></li>
-<li><p>Optionally, perform one of the following operations:</p>
-
-<p><table ><tbody><tr><th >Option</th><th >Action</th></tr><tr><td valign="top">Update the configuration of the advanced properties.</td><td valign="top">Edit the default values in the <strong>Advanced Properties</strong> section. <br />For more information, see <a href="#advanced-properties">Advanced Properties</a>.</td></tr><tr><td valign="top">Configure the types of events that you want the driver to log.</td><td valign="top">Click <strong>Logging Options</strong>. <br />For more information, see <a href="#logging-options">Logging Options</a>.</td></tr><tr><td valign="top">Create views or explore Drill sources.</td><td valign="top">Click <strong>Drill Explorer</strong>. <br />For more information, see <a href="/docs/using-drill-explorer-on-windows">Using Drill Explorer</a> to Browse Data and Create Views.</td></tr></tbody></table></p></li>
-<li><p>Click <strong>OK</strong> to save the DSN.</p></li>
-</ol>
-
-<h2 id="configuration-options">Configuration Options</h2>
-
-<h3 id="connection-type">Connection Type</h3>
-
-<p>ODBC can connect directly to a Drillbit or to a ZooKeeper Quorum. Select your
-connection type based on your environment and Drillbit configuration.</p>
-
-<p>The following table lists the appropriate connection type for each scenario:</p>
-
-<table ><tbody><tr><th >Scenario</th><th >Connection Type</th></tr><tr><td valign="top">Drillbit is running in embedded mode.</td><td valign="top">Direct to Drillbit</td></tr><tr><td valign="top">Drillbit is registered with the ZooKeeper in a testing environment.</td><td valign="top">ZooKeeper Quorum or Direct to Drillbit</td></tr><tr><td valign="top">Drillbit is registered with the ZooKeeper in a production environment.</td><td valign="top">ZooKeeper Quorum</td></tr></tbody></table>
-
-<h4 id="connection-to-zookeeper-quorum">Connection to Zookeeper Quorum</h4>
-
-<p>When you choose to connect to a ZooKeeper Quorum, the ODBC driver connects to
-the ZooKeeper Quorum to get a list of available Drillbits in the specified
-cluster. Then, the ODBC driver submits a query after selecting a Drillbit. All
-Drillbits in the cluster process the query and the Drillbit that received the
-query returns the query results.</p>
-
-<p><img src="/docs/img/ODBC_to_Quorum.png" alt="ODBC to Quorum"></p>
-
-<p>In a production environment, you should connect to a ZooKeeper Quorum for a
-more reliable connection. If one Drillbit is not available, another Drillbit
-that is registered with the ZooKeeper quorum can accept the query.</p>
-
-<h4 id="direct-connection-to-drillbit">Direct Connection to Drillbit</h4>
-
-<p>When you choose to connect directly to a Drillbit, the ODBC driver connects to
-the Drillbit and submits a query. If you connect directly to Drillbit that is
-not part of a cluster, the Drillbit that you connect to processes the query.
-If you connect directly to a Drillbit that is part of a cluster, all Drillbits
-in the cluster process the query. In either case, the Drillbit that the ODBC
-driver connected to returns the query results.</p>
-
-<p><img src="/docs/img/ODBC_to_Drillbit.png" alt=""></p>
-
-<h3 id="catalog">Catalog</h3>
-
-<p>This value defaults to DRILL and cannot be changed.</p>
-
-<h3 id="schema">Schema</h3>
-
-<p>The Default Schema list contains the data sources that you have configured to
-use with Drill via the Drill Storage Plugin.</p>
-
-<p>Views that you create using the Drill Explorer do not appear under the schema
-associated with the data source type. Instead, the views can be accessed from
-the file-based schema that you selected when saving the view.</p>
-
-<h3 id="advanced-properties">Advanced Properties</h3>
-
-<p>The Advanced Properties field allows you to customize the DSN.<br>
-You can configure the values of the following advanced properties:</p>
-
-<table ><tbody><tr><th >Property Name</th><th >Default Value</th><th >Description</th></tr><tr><td valign="top">HandshakeTimeout</td><td valign="top">5</td><td valign="top">An integer value representing the number of seconds that the driver waits to establish a connection before aborting. When set to 0, the driver does not abort connection attempts.</td></tr><tr><td valign="top">QueryTimeout</td><td valign="top">180</td><td valign="top">An integer value representing the number of seconds for the driver to wait before automatically stopping a query. When set to 0, the driver does not stop queries automatically.</td></tr><tr><td valign="top">TimestampTZDisplayTimezone</td><td valign="top">local</td><td valign="top">A string value that defines how the timestamp with timezone is displayed:<ul><li class="Body"><strong>local</strong>\u2014Timestamps appear in the time zone of the user.</li><li class="Body"><strong>utc</strong>\u2014Timestamps appear in Coordinated Universal Time (UTC).</li></ul
></td></tr><tr><td valign="top">ExcludedSchemas</td><td valign="top">sys, INFORMATION_SCHEMA</td><td valign="top">A list of schemas that should not appear in client applications such as Drill Explorer, Tableau, and Excel. Separate schemas in the list using a comma (,).</td></tr></tbody></table>
-
-<p>Separate each advanced property using a semicolon.</p>
-
-<p>For example, the following Advanced Properties string excludes the schemas
-named test and abc; sets the timeout to 30 seconds; and, sets the time zone to
-Coordinated Universal Time:<br>
-<code>HandshakeTimeout=30;QueryTimeout=30;TimestampTZDisplayTimezone=utc;ExcludedSchemas=test,abc</code></p>
-
-<h3 id="logging-options">Logging Options</h3>
-
-<p>Configure logging to troubleshoot issues. To configure logging, click the
-Logging Options button on the ODBC DSN Setup dialog and then set a log level
-and a log path.</p>
-
-<p>If logging is enabled, the MapR Drill ODBC driver logs events in following log
-files in the log path that you configure:</p>
-
-<table ><tbody><tr><th >Log File</th><th >Description</th></tr><tr><td valign="top">driver.log</td><td valign="top">A log of driver events.</td></tr><tr><td valign="top">drillclient.log</td><td valign="top">A log of the Drill client events.</td></tr></tbody></table>
-
-<h4 id="logging-levels">Logging Levels</h4>
-
-<p>Each logging level provides a different level of detail in the log files. The
-following log levels are available:</p>
-
-<table ><tbody><tr><th >Logging Level</th><th >Description</th></tr><tr><td valign="top">OFF</td><td valign="top">Disables all logging.</td></tr><tr><td valign="top">FATAL</td><td valign="top">Logs severe error events that may cause the driver to stop running.</td></tr><tr><td valign="top">ERROR</td><td valign="top">Logs error events that may allow the driver to continue running.</td></tr><tr><td valign="top">WARNING</td><td valign="top">Logs events about potentially harmful situations.</td></tr><tr><td valign="top">INFO</td><td valign="top">Logs high-level events about driver processes.</td></tr><tr><td valign="top">DEBUG</td><td valign="top">Logs detailed events that may help to debug issues.</td></tr><tr><td colspan="1" valign="top">TRACE</td><td colspan="1" valign="top">Logs finer-grained events than the DEBUG level.</td></tr></tbody></table>
-
-<h2 id="create-an-odbc-connection-string">Create an ODBC Connection String</h2>
-
-<p>If you want to connect to a Drill data source from an application that does
-not require a DSN, you can use an ODBC connection string.<br>
-The following table describes the properties that you can use in the
-connection string:</p>
-
-<table ><tbody><tr><th >Property</th><th >Description</th></tr><tr><td valign="top"><a href="#advanced-properties">AdvancedProperties</a></td><td valign="top">Separate advanced properties using a semicolon (;), and then surround all advanced properties in a connection string using braces { and }.</td></tr><tr><td valign="top">Catalog</td><td valign="top">The name of the catalog, under which all of the schemas are organized. The catalog name is DRILL.</td></tr><tr><td valign="top"><a href="#connection-type"> ConnectionType</a></td><td valign="top">One of the following values:<br />\u2022 Direct\u2014Connect to a Drill server using Host and Port properties in the connection string.<br />\u2022 ZooKeeper\u2014Connect to a ZooKeeper cluster using ZKQuorum and ZKClusterID properties in the connection string.</td></tr><tr><td valign="top">DRIVER</td><td valign="top">The name of the installed driver: MapR Drill ODBC Driver<br />(Required)</td></tr><tr><td valign="top">Host</td><td valign="top">If the
ConnectionType property is set to Direct, indicate the IP address or hostname of the Drillbit server.</td></tr><tr><td valign="top">Port</td><td valign="top">If the ConnectionType property is set to Direct, indicate the port on which the Drillbit server is listening.</td></tr><tr><td valign="top">Schema</td><td valign="top">The name of the database schema to use when a schema is not explicitly specified in a query.<br />Note: Queries on other schemas can still be issued by explicitly specifying the schema in the query.</td></tr><tr><td valign="top">ZKClusterID</td><td valign="top">If the ConnectionType property is set to ZooKeeper, then use ZKClusterID to indicate the name of the Drillbit cluster to use.</td></tr><tr><td valign="top">ZKQuorum</td><td valign="top">If the ConnectionType property is set to ZooKeeper, then use ZKQuorum to indicate the server(s) in your ZooKeeper cluster. Separate multiple servers using a comma (,).</td></tr></tbody></table>
-
-<h4 id="connection-string-examples">Connection String Examples</h4>
-
-<p>The following is an example connection string for the Direct connection type: </p>
-<div class="highlight"><pre><code class="language-text" data-lang="text"> DRIVER=MapR Drill ODBC Driver;AdvancedProperties={HandshakeTimeout=0;QueryTimeout=0;TimestampTZDisplayTimezone=utc;ExcludedSchemas=sys,INFORMATION_SCHEMA;};Catalog=DRILL;Schema=hivestg;ConnectionType=Direct;Host=192.168.202.147;Port=31010
-</code></pre></div>
-<p>The following is an example connection string for the Zookeeper connection
-type: </p>
-<div class="highlight"><pre><code class="language-text" data-lang="text"> DRIVER=MapR Drill ODBC Driver;AdvancedProperties={HandshakeTimeout=0;QueryTimeout=0;TimestampTZDisplayTimezone=utc;ExcludedSchemas=sys, INFORMATION_SCHEMA;};Catalog=DRILL;Schema=;ConnectionType=ZooKeeper;ZKQuorum=192.168.39.43:5181;ZKClusterID=drillbits1
-</code></pre></div>
-<h4 id="what's-next?-go-to-step-3.-connect-to-drill-data-sources-from-a-bi-tool.">What's Next? Go to <a href="/docs/connecting-to-odbc-data-sources">Step 3. Connect to Drill Data Sources from a BI Tool</a>.</h4>
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-
- <div class="int_text" align="left">
-
- <p>Drill supports the following ANSI standard clauses in the SELECT statement:</p>
-
-<ul>
-<li>WITH clause</li>
-<li>SELECT list</li>
-<li>FROM clause</li>
-<li>WHERE clause</li>
-<li>GROUP BY clause</li>
-<li>HAVING clause</li>
-<li>ORDER BY clause (with an optional LIMIT clause)</li>
-</ul>
-
-<p>You can use the same SELECT syntax in the following commands:</p>
-
-<ul>
-<li>CREATE TABLE AS (CTAS)</li>
-<li>CREATE VIEW</li>
-</ul>
-
-<p>INSERT INTO SELECT is not yet supported.</p>
-
-<h2 id="column-aliases">Column Aliases</h2>
-
-<p>You can use named column aliases in the SELECT list to provide meaningful
-names for regular columns and computed columns, such as the results of
-aggregate functions. See the section on running queries for examples.</p>
-
-<p>You cannot reference column aliases in the following clauses:</p>
-
-<ul>
-<li>WHERE</li>
-<li>GROUP BY</li>
-<li>HAVING</li>
-</ul>
-
-<p>Because Drill works with schema-less data sources, you cannot use positional
-aliases (1, 2, etc.) to refer to SELECT list columns, except in the ORDER BY
-clause.</p>
-
-<h2 id="union-all-set-operator">UNION ALL Set Operator</h2>
-
-<p>Drill supports the UNION ALL set operator to combine two result sets. The
-distinct UNION operator is not yet supported.</p>
-
-<p>The EXCEPT, EXCEPT ALL, INTERSECT, and INTERSECT ALL operators are not yet
-supported.</p>
-
-<h2 id="joins">Joins</h2>
-
-<p>Drill supports ANSI standard joins in the FROM and WHERE clauses:</p>
-
-<ul>
-<li>Inner joins</li>
-<li>Left, full, and right outer joins</li>
-</ul>
-
-<p>The following types of join syntax are supported:</p>
-
-<table><thead>
-<tr>
-<th>Join type</th>
-<th>Syntax</th>
-</tr>
-</thead><tbody>
-<tr>
-<td>Join condition in WHERE clause</td>
-<td>FROM table1, table 2 WHERE table1.col1=table2.col1</td>
-</tr>
-<tr>
-<td>USING join in FROM clause</td>
-<td>FROM table1 JOIN table2 USING(col1, ...)</td>
-</tr>
-<tr>
-<td>ON join in FROM clause</td>
-<td>FROM table1 JOIN table2 ON table1.col1=table2.col1</td>
-</tr>
-<tr>
-<td>NATURAL JOIN in FROM clause</td>
-<td>FROM table 1 NATURAL JOIN table 2</td>
-</tr>
-</tbody></table>
-
-<p>Cross-joins are not yet supported. You must specify a join condition when more
-than one table is listed in the FROM clause.</p>
-
-<p>Non-equijoins are supported if the join also contains an equality condition on
-the same two tables as part of a conjunction:</p>
-<div class="highlight"><pre><code class="language-text" data-lang="text">table1.col1 = table2.col1 AND table1.c2 < table2.c2
-</code></pre></div>
-<p>This restriction applies to both inner and outer joins.</p>
-
-<h2 id="subqueries">Subqueries</h2>
-
-<p>You can use the following subquery operators in Drill queries. These operators
-all return Boolean results.</p>
-
-<ul>
-<li>ALL</li>
-<li>ANY</li>
-<li>EXISTS</li>
-<li>IN</li>
-<li>SOME</li>
-</ul>
-
-<p>In general, correlated subqueries are supported. EXISTS and NOT EXISTS
-subqueries that do not contain a correlation join are not yet supported.</p>
-
-<h2 id="with-clause">WITH Clause</h2>
-
-<p>The WITH clause is an optional clause used to contain one or more common table
-expressions (CTE) where each CTE defines a temporary table that exists for the
-duration of the query. Each subquery in the WITH clause specifies a table
-name, an optional list of column names, and a SELECT statement.</p>
-
-<h2 id="syntax">Syntax</h2>
-
-<p>The WITH clause supports the following syntax:</p>
-<div class="highlight"><pre><code class="language-text" data-lang="text">[ WITH with_subquery [, ...] ]
-where with_subquery is:
-with_subquery_table_name [ ( column_name [, ...] ) ] AS ( query )
-</code></pre></div>
-<h2 id="parameters">Parameters</h2>
-
-<p><em>with_subquery</em>table_name_</p>
-
-<p>A unique name for a temporary table that defines the results of a WITH clause
-subquery. You cannot use duplicate names within a single WITH clause. You must
-give each subquery a table name that can be referenced in the FROM clause.</p>
-
-<p><em>column</em>name_</p>
-
-<p>An optional list of output column names for the WITH clause subquery,
-separated by commas. The number of column names specified must be equal to or
-less than the number of columns defined by the subquery.</p>
-
-<p><em>query</em></p>
-
-<p>Any SELECT query that Drill supports. See
-<a href="/docs/SELECT+Statements">SELECT</a>.</p>
-
-<h2 id="usage-notes">Usage Notes</h2>
-
-<p>Use the WITH clause to efficiently define temporary tables that Drill can
-access throughout the execution of a single query. The WITH clause is
-typically a simpler alternative to using subqueries in the main body of the
-SELECT statement. In some cases, Drill can evaluate a WITH subquery once and
-reuse the results for query optimization.</p>
-
-<p>You can use a WITH clause in the following SQL statements:</p>
-
-<ul>
-<li><p>SELECT (including subqueries within SELECT statements)</p></li>
-<li><p>CREATE TABLE AS</p></li>
-<li><p>CREATE VIEW</p></li>
-<li><p>EXPLAIN</p></li>
-</ul>
-
-<p>You can reference the temporary tables in the FROM clause of the query. If the
-FROM clause does not reference any tables defined by the WITH clause, Drill
-ignores the WITH clause and executes the query as normal.</p>
-
-<p>Drill can only reference a table defined by a WITH clause subquery in the
-scope of the SELECT query that the WITH clause begins. For example, you can
-reference such a table in the FROM clause of a subquery in the SELECT list,
-WHERE clause, or HAVING clause. You cannot use a WITH clause in a subquery and
-reference its table in the FROM clause of the main query or another subquery.</p>
-
-<p>You cannot specify another WITH clause inside a WITH clause subquery.</p>
-
-<p>For example, the following query includes a forward reference to table t2 in
-the definition of table t1:</p>
-
-<h2 id="example">Example</h2>
-
-<p>The following example shows the WITH clause used to create a WITH query named
-<code>emp_data</code> that selects all of the rows from the <code>employee.json</code> file. The
-main query selects the <code>full_name, position_title, salary</code>, and <code>hire_date</code>
-rows from the <code>emp_data</code> temporary table (created from the WITH subquery) and
-orders the results by the hire date. The <code>emp_data</code> table only exists for the
-duration of the query.</p>
-
-<p><strong>Note:</strong> The <code>employee.json</code> file is included with the Drill installation. It is located in the <code>cp.default</code> workspace which is configured by default. </p>
-<div class="highlight"><pre><code class="language-text" data-lang="text">0: jdbc:drill:zk=local> with emp_data as (select * from cp.`employee.json`) select full_name, position_title, salary, hire_date from emp_data order by hire_date limit 10;
-+------------------+-------------------------+------------+-----------------------+
-| full_name | position_title | salary | hire_date |
-+------------------+-------------------------+------------+-----------------------+
-| Bunny McCown | Store Assistant Manager | 8000.0 | 1993-05-01 00:00:00.0 |
-| Danielle Johnson | Store Assistant Manager | 8000.0 | 1993-05-01 00:00:00.0 |
-| Dick Brummer | Store Assistant Manager | 7900.0 | 1993-05-01 00:00:00.0 |
-| Gregory Whiting | Store Assistant Manager | 10000.0 | 1993-05-01 00:00:00.0 |
-| Juanita Sharp | HQ Human Resources | 6700.0 | 1994-01-01 00:00:00.0 |
-| Sheri Nowmer | President | 80000.0 | 1994-12-01 00:00:00.0 |
-| Rebecca Kanagaki | VP Human Resources | 15000.0 | 1994-12-01 00:00:00.0 |
-| Shauna Wyro | Store Manager | 15000.0 | 1994-12-01 00:00:00.0 |
-| Roberta Damstra | VP Information Systems | 25000.0 | 1994-12-01 00:00:00.0 |
-| Pedro Castillo | VP Country Manager | 35000.0 | 1994-12-01 00:00:00.0 |
-+------------+----------------+--------------+------------------------------------+
-</code></pre></div>
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- <p>The SHOW TABLES command returns a list of views created within a schema. It
-also returns the tables that exist in Hive, HBase, and MapR-DB when you have
-these data sources configured as storage plugin instances. See<a href="/docs/storage-plugin-registration"> Storage Plugin
-Registration</a>.</p>
-
-<h2 id="syntax">Syntax</h2>
-
-<p>The SHOW TABLES command supports the following syntax:</p>
-<div class="highlight"><pre><code class="language-text" data-lang="text">SHOW TABLES;
-</code></pre></div>
-<h2 id="usage-notes">Usage Notes</h2>
-
-<p>First issue the USE command to identify the schema for which you want to view
-tables or views. For example, the following USE statement tells Drill that you
-only want information from the <code>dfs.myviews</code> schema:</p>
-<div class="highlight"><pre><code class="language-text" data-lang="text">USE dfs.myviews;
-</code></pre></div>
-<p>In this example, \u201c<code>myviews</code>\u201d is a workspace created withing an instance of the
-<code>dfs</code> storage plugin.</p>
-
-<p>When you use a particular schema and then issue the SHOW TABLES command, Drill
-returns the tables and views within that schema.</p>
-
-<h4 id="limitations">Limitations</h4>
-
-<ul>
-<li><p>You can create and query tables within the file system, however Drill does not return these tables when you issue the SHOW TABLES command. You can issue the <a href="/docs/show-files-command">SHOW FILES </a>command to see a list of all files, tables, and views, including those created in Drill. </p></li>
-<li><p>You cannot create Hive, HBase, or MapR-DB tables in Drill. </p></li>
-</ul>
-
-<h2 id="examples">Examples</h2>
-
-<p>The following examples demonstrate the steps that you can follow when you want
-to issue the SHOW TABLES command on the file system, Hive, and HBase. </p>
-
-<p>Complete the following steps to see views that exist in a file system and
-tables that exist in Hive and HBase data sources:</p>
-
-<ol>
-<li><p>Issue the SHOW SCHEMAS command to see a list of available schemas.</p>
-<div class="highlight"><pre><code class="language-text" data-lang="text">0: jdbc:drill:zk=drilldemo:5181> show schemas;
-+-------------+
-| SCHEMA_NAME |
-+-------------+
-| hive.default |
-| dfs.reviews |
-| dfs.flatten |
-| dfs.default |
-| dfs.root |
-| dfs.logs |
-| dfs.myviews |
-| dfs.clicks |
-| dfs.tmp |
-| sys |
-| hbase |
-| INFORMATION_SCHEMA |
-| s3.twitter |
-| s3.reviews |
-| s3.default |
-+-------------+
-15 rows selected (0.072 seconds)
-</code></pre></div></li>
-<li><p>Issue the USE command to switch to a particular schema. When you use a particular schema, Drill searches or queries within that schema only. </p>
-<div class="highlight"><pre><code class="language-text" data-lang="text">0: jdbc:drill:zk=drilldemo:5181> use dfs.myviews;
-+------------+------------+
-| ok | summary |
-+------------+------------+
-| true | Default schema changed to 'dfs.myviews' |
-+------------+------------+
-1 row selected (0.025 seconds)
-</code></pre></div></li>
-<li><p>Issue the SHOW TABLES command to see the views or tables that exist within workspace.</p>
-<div class="highlight"><pre><code class="language-text" data-lang="text">0: jdbc:drill:zk=drilldemo:5181> show tables;
-+--------------+------------+
-| TABLE_SCHEMA | TABLE_NAME |
-+--------------+------------+
-| dfs.myviews | logs_vw |
-| dfs.myviews | customers_vw |
-| dfs.myviews | s3_review_vw |
-| dfs.myviews | clicks_vw |
-| dfs.myviews | nestedclickview |
-| dfs.myviews | s3_user_vw |
-| dfs.myviews | s3_bus_vw |
-+--------------+------------+
-7 rows selected (0.499 seconds)
-0: jdbc:drill:zk=drilldemo:5181>
-</code></pre></div></li>
-<li><p>Switch to the Hive schema and issue the SHOW TABLES command to see the Hive tables that exist.</p>
-<div class="highlight"><pre><code class="language-text" data-lang="text">0: jdbc:drill:zk=drilldemo:5181> use hive;
-+------------+------------+
-| ok | summary |
-+------------+------------+
-| true | Default schema changed to 'hive' |
-+------------+------------+
-1 row selected (0.043 seconds)
-
-0: jdbc:drill:zk=drilldemo:5181> show tables;
-+--------------+------------+
-| TABLE_SCHEMA | TABLE_NAME |
-+--------------+------------+
-| hive.default | orders |
-| hive.default | products |
-+--------------+------------+
-2 rows selected (0.552 seconds)
-</code></pre></div></li>
-<li><p>Switch to the HBase schema and issue the SHOW TABLES command to see the HBase tables that exist within the schema.</p>
-<div class="highlight"><pre><code class="language-text" data-lang="text">0: jdbc:drill:zk=drilldemo:5181> use hbase;
-+------------+------------+
-| ok | summary |
-+------------+------------+
-| true | Default schema changed to 'hbase' |
-+------------+------------+
-1 row selected (0.043 seconds)
-
-0: jdbc:drill:zk=drilldemo:5181> show tables;
-+--------------+------------+
-| TABLE_SCHEMA | TABLE_NAME |
-+--------------+------------+
-| hbase | customers |
-+--------------+------------+
-1 row selected (0.412 seconds)
-</code></pre></div></li>
-</ol>
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- <li class="toctree-l2"><a class="reference internal" href="/docs/architecture-introduction/">Architecture Introduction</a></li>
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- <li class="toctree-l2"><a class="reference internal" href="/docs/core-modules/">Core Modules</a></li>
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- <li class="toctree-l2"><a href="javascript: void(0);">Architectural Highlights</a></li>
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- <li class="toctree-l3"><a class="reference internal" href="/docs/flexibility/">Flexibility</a></li>
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- <li class="toctree-l3"><a class="reference internal" href="/docs/performance/">Performance</a></li>
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- </ul>
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- </ul>
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- <li class="toctree-l1"><a href="javascript: void(0);">Tutorials</a></li>
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- <li class="toctree-l2"><a class="reference internal" href="/docs/tutorials-introduction/">Tutorials Introduction</a></li>
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- <li class="toctree-l2"><a class="reference internal" href="/docs/drill-in-10-minutes/">Drill in 10 Minutes</a></li>
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- <li class="toctree-l2"><a class="reference internal" href="/docs/analyzing-the-yelp-academic-dataset/">Analyzing the Yelp Academic Dataset</a></li>
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- <li class="toctree-l2"><a href="javascript: void(0);">Learn Drill with the MapR Sandbox</a></li>
- <ul style="display: none">
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- <li class="toctree-l3"><a class="reference internal" href="/docs/about-the-mapr-sandbox/">About the MapR Sandbox</a></li>
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- <li class="toctree-l3"><a class="reference internal" href="/docs/installing-the-apache-drill-sandbox/">Installing the Apache Drill Sandbox</a></li>
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- <li class="toctree-l3"><a class="reference internal" href="/docs/getting-to-know-the-drill-sandbox/">Getting to Know the Drill Sandbox</a></li>
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- <li class="toctree-l3"><a class="reference internal" href="/docs/lession-1-learn-about-the-data-set/">Lession 1: Learn about the Data Set</a></li>
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- <li class="toctree-l3"><a class="reference internal" href="/docs/lession-2-run-queries-with-ansi-sql/">Lession 2: Run Queries with ANSI SQL</a></li>
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- <li class="toctree-l3"><a class="reference internal" href="/docs/lession-3-run-queries-on-complex-data-types/">Lession 3: Run Queries on Complex Data Types</a></li>
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- <li class="toctree-l3"><a class="reference internal" href="/docs/summary/">Summary</a></li>
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- </ul>
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- <li class="toctree-l2"><a class="reference internal" href="/docs/analyzing-highly-dynamic-datasets/">Analyzing Highly Dynamic Datasets</a></li>
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- </ul>
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- <li class="toctree-l1"><a href="javascript: void(0);">Install Drill</a></li>
- <ul style="display: none">
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- <li class="toctree-l2"><a class="reference internal" href="/docs/install-drill-introduction/">Install Drill Introduction</a></li>
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- <li class="toctree-l2"><a href="javascript: void(0);">Installing Drill in Embedded Mode</a></li>
- <ul style="display: none">
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- <li class="toctree-l3"><a class="reference internal" href="/docs/embedded-mode-prerequisites/">Embedded Mode Prerequisites</a></li>
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- <li class="toctree-l3"><a class="reference internal" href="/docs/installing-drill-on-linux-and-mac-os-x/">Installing Drill on Linux and Mac OS X</a></li>
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- <li class="toctree-l3"><a class="reference internal" href="/docs/starting-drill-on-linux-and-mac-os-x/">Starting Drill on Linux and Mac OS X</a></li>
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- <li class="toctree-l3"><a class="reference internal" href="/docs/installing-drill-on-windows/">Installing Drill on Windows</a></li>
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- <li class="toctree-l3"><a class="reference internal" href="/docs/starting-drill-on-windows/">Starting Drill on Windows</a></li>
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- </ul>
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- <li class="toctree-l2"><a href="javascript: void(0);">Installing Drill in Distributed Mode</a></li>
- <ul style="display: none">
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- <li class="toctree-l3"><a class="reference internal" href="/docs/distributed-mode-prerequisites/">Distributed Mode Prerequisites</a></li>
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- <li class="toctree-l3"><a class="reference internal" href="/docs/installing-drill-on-the-cluster/">Installing Drill on the Cluster</a></li>
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- <li class="toctree-l3"><a class="reference internal" href="/docs/starting-drill-in-distributed-mode/">Starting Drill in Distributed Mode</a></li>
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- </ul>
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- </ul>
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- <li class="toctree-l1"><a href="javascript: void(0);">Connect a Data Source</a></li>
- <ul style="display: none">
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- <li class="toctree-l2"><a class="reference internal" href="/docs/connect-a-data-source-introduction/">Connect a Data Source Introduction</a></li>
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- <li class="toctree-l2"><a class="reference internal" href="/docs/storage-plugin-registration/">Storage Plugin Registration</a></li>
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- <li class="toctree-l2"><a href="javascript: void(0);">Storage Plugin Configuration</a></li>
- <ul style="display: none">
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- <li class="toctree-l3"><a class="reference internal" href="/docs/plugin-configuration-introduction/">Plugin Configuration Introduction</a></li>
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- <li class="toctree-l3"><a class="reference internal" href="/docs/workspaces/">Workspaces</a></li>
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- <li class="toctree-l3"><a class="reference internal" href="/docs/file-system-storage-plugin/">File System Storage Plugin</a></li>
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- <li class="toctree-l3"><a class="reference internal" href="/docs/hbase-storage-plugin/">HBase Storage Plugin</a></li>
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- <li class="toctree-l3"><a class="reference internal" href="/docs/hive-storage-plugin/">Hive Storage Plugin</a></li>
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- <li class="toctree-l3"><a class="reference internal" href="/docs/drill-default-input-format/">Drill Default Input Format</a></li>
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- </ul>
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- <li class="toctree-l2"><a class="reference internal" href="/docs/mongodb-plugin-for-apache-drill/">MongoDB Plugin for Apache Drill</a></li>
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- <li class="toctree-l2"><a class="reference internal" href="/docs/mapr-db-format/">MapR-DB Format</a></li>
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- </ul>
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- <li class="toctree-l1"><a href="javascript: void(0);">ODBC/JDBC Interfaces</a></li>
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- <li class="toctree-l2"><a class="reference internal" href="/docs/interfaces-introduction/">Interfaces Introduction</a></li>
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- <li class="toctree-l2"><a class="reference internal" href="/docs/using-jdbc/">Using JDBC</a></li>
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- <li class="toctree-l2"><a href="javascript: void(0);">Using ODBC on Linux and Mac OS X</a></li>
- <ul style="display: none">
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- <li class="toctree-l3"><a class="reference internal" href="/docs/odbc-on-linux-and-mac-introduction/">ODBC on Linux and Mac Introduction</a></li>
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- <li class="toctree-l3"><a class="reference internal" href="/docs/installing-the-driver-on-linux/">Installing the Driver on Linux</a></li>
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- <li class="toctree-l3"><a class="reference internal" href="/docs/installing-the-driver-on-mac-os-x/">Installing the Driver on Mac OS X</a></li>
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- <li class="toctree-l3"><a class="reference internal" href="/docs/configuring-connections-on-linux-and-mac-os-x/">Configuring Connections on Linux and Mac OS X</a></li>
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- <li class="toctree-l3"><a class="reference internal" href="/docs/driver-configuration-options/">Driver Configuration Options</a></li>
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- <li class="toctree-l3"><a class="reference internal" href="/docs/using-a-connection-string/">Using a Connection String</a></li>
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- <li class="toctree-l3"><a class="reference internal" href="/docs/advanced-properties/">Advanced Properties</a></li>
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- <li class="toctree-l3"><a class="reference internal" href="/docs/testing-the-odbc-connection/">Testing the ODBC Connection</a></li>
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- </ul>
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- <li class="toctree-l2"><a href="javascript: void(0);">Using ODBC on Windows</a></li>
- <ul style="display: none">
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- <li class="toctree-l3"><a class="reference internal" href="/docs/installing-the-driver-on-windows/">Installing the Driver on Windows</a></li>
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- <li class="toctree-l3"><a class="reference internal" href="/docs/configuring-connections-on-windows/">Configuring Connections on Windows</a></li>
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- <li class="toctree-l3"><a class="reference internal" href="/docs/connecting-to-odbc-data-sources/">Connecting to ODBC Data Sources</a></li>
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- <li class="toctree-l3"><a class="reference internal" href="/docs/tableau-examples/">Tableau Examples</a></li>
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- <li class="toctree-l3"><a class="reference internal" href="/docs/using-drill-explorer-on-windows/">Using Drill Explorer on Windows</a></li>
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- </ul>
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-
- <li class="toctree-l2"><a class="reference internal" href="/docs/using-microstrategy-analytics-with-drill/">Using MicroStrategy Analytics with Drill</a></li>
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- <li class="toctree-l2"><a class="reference internal" href="/docs/using-apache-drill-with-tibco-spotfire-desktop/">Using Apache Drill with Tibco Spotfire Desktop</a></li>
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-
- <li class="toctree-l2"><a class="reference internal" href="/docs/using-apache-drill-with-tibco-spotfire-desktop/">Using Apache Drill with Tibco Spotfire Desktop</a></li>
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- </ul>
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- <li class="toctree-l1"><a href="javascript: void(0);">Query Data</a></li>
- <ul style="display: none">
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- <li class="toctree-l2"><a class="reference internal" href="/docs/query-data-introduction/">Query Data Introduction</a></li>
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- <li class="toctree-l2"><a href="javascript: void(0);">Querying a File System</a></li>
- <ul style="display: none">
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- <li class="toctree-l3"><a class="reference internal" href="/docs/querying-a-file-system-introduction/">Querying a File System Introduction</a></li>
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- <li class="toctree-l3"><a class="reference internal" href="/docs/querying-json-files/">Querying JSON Files</a></li>
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- <li class="toctree-l3"><a class="reference internal" href="/docs/querying-parquet-files/">Querying Parquet Files</a></li>
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- <li class="toctree-l3"><a class="reference internal" href="/docs/querying-plain-text-files/">Querying Plain Text Files</a></li>
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- <li class="toctree-l3"><a class="reference internal" href="/docs/querying-directories/">Querying Directories</a></li>
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- </ul>
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- <li class="toctree-l2"><a class="reference internal" href="/docs/querying-hbase/">Querying HBase</a></li>
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- <li class="toctree-l2"><a href="javascript: void(0);">Querying Complex Data</a></li>
- <ul style="display: none">
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- <li class="toctree-l3"><a class="reference internal" href="/docs/querying-complex-data-introduction/">Querying Complex Data Introduction</a></li>
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- <li class="toctree-l3"><a class="reference internal" href="/docs/sample-data-donuts/">Sample Data: Donuts</a></li>
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- <li class="toctree-l3"><a class="reference internal" href="/docs/selecting-flat-data/">Selecting Flat Data</a></li>
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- <li class="toctree-l3"><a class="reference internal" href="/docs/using-sql-functions-clauses-and-joins/">Using SQL Functions, Clauses, and Joins</a></li>
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- <li class="toctree-l3"><a class="reference internal" href="/docs/selecting-nested-data-for-a-column/">Selecting Nested Data for a Column</a></li>
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- <li class="toctree-l3"><a class="reference internal" href="/docs/selecting-multiple-columns-within-nested-data/">Selecting Multiple Columns Within Nested Data</a></li>
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- </ul>
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- <li class="toctree-l2"><a class="reference internal" href="/docs/querying-hive/">Querying Hive</a></li>
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- <li class="toctree-l2"><a class="reference internal" href="/docs/querying-the-information-schema/">Querying the INFORMATION SCHEMA</a></li>
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- <li class="toctree-l2"><a class="reference internal" href="/docs/querying-system-tables/">Querying System Tables</a></li>
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- </ul>
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- <li class="toctree-l1"><a href="javascript: void(0);">SQL Reference</a></li>
- <ul style="display: none">
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- <li class="toctree-l2"><a class="reference internal" href="/docs/sql-reference-introduction/">SQL Reference Introduction</a></li>
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- <li class="toctree-l2"><a href="javascript: void(0);">Data Types</a></li>
- <ul style="display: none">
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- <li class="toctree-l3"><a class="reference internal" href="/docs/supported-data-types/">Supported Data Types</a></li>
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- <li class="toctree-l3"><a class="reference internal" href="/docs/date-time-and-timestamp/">Date, Time, and Timestamp</a></li>
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- <li class="toctree-l3"><a class="reference internal" href="/docs/handling-different-data-types/">Handling Different Data Types</a></li>
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- </ul>
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- <li class="toctree-l2"><a class="reference internal" href="/docs/lexical-structure/">Lexical Structure</a></li>
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- <li class="toctree-l2"><a class="reference internal" href="/docs/operators/">Operators</a></li>
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- <li class="toctree-l2"><a href="javascript: void(0);">SQL Functions</a></li>
- <ul style="display: none">
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- <li class="toctree-l3"><a class="reference internal" href="/docs/about-sql-function-examples/">About SQL Function Examples</a></li>
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- <li class="toctree-l3"><a class="reference internal" href="/docs/math-and-trig/">Math and Trig</a></li>
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- <li class="toctree-l3"><a class="reference internal" href="/docs/data-type-conversion/">Data Type Conversion</a></li>
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- <li class="toctree-l3"><a class="reference internal" href="/docs/date-time-functions-and-arithmetic/">Date/Time Functions and Arithmetic</a></li>
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- <li class="toctree-l3"><a class="reference internal" href="/docs/string-manipulation/">String Manipulation</a></li>
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- <li class="toctree-l3"><a class="reference internal" href="/docs/aggregate-and-aggregate-statistical/">Aggregate and Aggregate Statistical</a></li>
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- <li class="toctree-l3"><a class="reference internal" href="/docs/functions-for-handling-nulls/">Functions for Handling Nulls</a></li>
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- </ul>
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- <li class="toctree-l2"><a href="javascript: void(0);">Nested Data Functions</a></li>
- <ul style="display: none">
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- <li class="toctree-l3"><a class="reference internal" href="/docs/nested-data-limitations/">Nested Data Limitations</a></li>
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- <li class="toctree-l3"><a class="reference internal" href="/docs/flatten/">FLATTEN</a></li>
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- <li class="toctree-l3"><a class="reference internal" href="/docs/kvgen/">KVGEN</a></li>
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- <li class="toctree-l3"><a class="reference internal" href="/docs/repeated-count/">REPEATED_COUNT</a></li>
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- <li class="toctree-l3"><a class="reference internal" href="/docs/repeated-contains/">REPEATED_CONTAINS</a></li>
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- </ul>
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- <li class="toctree-l2"><a class="reference internal" href="/docs/query-directory-functions/">Query Directory Functions</a></li>
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- <li class="toctree-l2"><a href="javascript: void(0);">SQL Commands</a></li>
- <ul style="display: none">
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- <li class="toctree-l3"><a class="reference internal" href="/docs/supported-sql-commands/">Supported SQL Commands</a></li>
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- <li class="toctree-l3"><a class="reference internal" href="/docs/alter-session-command/">ALTER SESSION Command</a></li>
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- <li class="toctree-l3"><a class="reference internal" href="/docs/alter-system-command/">ALTER SYSTEM Command</a></li>
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- <li class="toctree-l3"><a class="reference internal" href="/docs/create-table-as-ctas-command/">CREATE TABLE AS (CTAS) command</a></li>
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- <li class="toctree-l3"><a class="reference internal" href="/docs/create-view-command/">CREATE VIEW command</a></li>
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- <li class="toctree-l3"><a class="reference internal" href="/docs/describe-command/">DESCRIBE Command</a></li>
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- <li class="toctree-l3"><a class="reference internal" href="/docs/explain-commands/">EXPLAIN commands</a></li>
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- <li class="toctree-l3"><a class="reference internal" href="/docs/select-statements/">SELECT Statements</a></li>
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- <li class="toctree-l3"><a class="reference internal" href="/docs/show-databases-and-show-schemas-command/">SHOW DATABASES AND SHOW SCHEMAS Command</a></li>
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- <li class="toctree-l3"><a class="reference internal" href="/docs/show-files-command/">SHOW FILES Command</a></li>
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- <li class="toctree-l3"><a class="reference internal" href="/docs/show-tables-command/">SHOW TABLES Command</a></li>
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- <li class="toctree-l3"><a class="reference internal" href="/docs/use-command/">USE Command</a></li>
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- </ul>
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- <li class="toctree-l2"><a href="javascript: void(0);">SQL Conditional Expressions</a></li>
- <ul style="display: none">
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- <li class="toctree-l3"><a class="reference internal" href="/docs/case/">CASE</a></li>
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- <li class="toctree-l2"><a class="reference internal" href="/docs/reserved-keywords/">Reserved Keywords</a></li>
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- <li class="toctree-l2"><a class="reference internal" href="/docs/sql-extensions/">SQL Extensions</a></li>
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- </ul>
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- <li class="toctree-l1"><a href="javascript: void(0);">Data Sources and File Formats</a></li>
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- <li class="toctree-l2"><a class="reference internal" href="/docs/data-sources-and-file-formats-introduction/">Data Sources and File Formats Introduction</a></li>
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- <li class="toctree-l2"><a class="reference internal" href="/docs/hive-to-drill-data-type-mapping/">Hive-to-Drill Data Type Mapping</a></li>
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- <li class="toctree-l2"><a class="reference internal" href="/docs/deploying-and-using-a-hive-udf/">Deploying and Using a Hive UDF</a></li>
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- <li class="toctree-l2"><a class="reference internal" href="/docs/parquet-format/">Parquet Format</a></li>
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- <li class="toctree-l2"><a class="reference internal" href="/docs/json-data-model/">JSON Data Model</a></li>
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- </ul>
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- <li class="toctree-l1"><a href="javascript: void(0);">Develop Custom Functions</a></li>
- <ul style="display: none">
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- <li class="toctree-l2"><a class="reference internal" href="/docs/develop-custom-functions-introduction/">Develop Custom Functions Introduction</a></li>
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- <li class="toctree-l2"><a class="reference internal" href="/docs/develop-a-simple-function/">Develop a Simple Function</a></li>
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- <li class="toctree-l2"><a class="reference internal" href="/docs/developing-an-aggregate-function/">Developing an Aggregate Function</a></li>
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- <li class="toctree-l2"><a class="reference internal" href="/docs/adding-custom-functions-to-drill/">Adding Custom Functions to Drill</a></li>
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- <li class="toctree-l2"><a class="reference internal" href="/docs/using-custom-functions-in-queries/">Using Custom Functions in Queries</a></li>
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- <li class="toctree-l2"><a class="reference internal" href="/docs/custom-function-interfaces/">Custom Function Interfaces</a></li>
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- </ul>
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- <li class="toctree-l1 current_section "><a href="javascript: void(0);">Manage Drill</a></li>
- <ul class="current_section">
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- <li class="toctree-l2"><a class="reference internal" href="/docs/manage-drill-introduction/">Manage Drill Introduction</a></li>
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- <li class="toctree-l2"><a class="reference internal" href="/docs/configuring-drill-in-a-dedicated-cluster/">Configuring Drill in a Dedicated Cluster</a></li>
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- <li class="toctree-l2"><a href="javascript: void(0);">Configuring a Multitenant Cluster</a></li>
- <ul style="display: none">
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- <li class="toctree-l3"><a class="reference internal" href="/docs/configuring-a-multitenant-cluster-introduction/">Configuring a Multitenant Cluster Introduction</a></li>
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- <li class="toctree-l3"><a class="reference internal" href="/docs/configuring-multitenant-resources/">Configuring Multitenant Resources</a></li>
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- <li class="toctree-l3"><a class="reference internal" href="/docs/configuring-resources-for-a-shared-drillbit/">Configuring Resources for a Shared Drillbit</a></li>
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- </ul>
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- <li class="toctree-l2"><a href="javascript: void(0);">Configuration Options</a></li>
- <ul style="display: none">
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- <li class="toctree-l3"><a class="reference internal" href="/docs/configuration-options-introduction/">Configuration Options Introduction</a></li>
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- <li class="toctree-l3"><a class="reference internal" href="/docs/start-up-options/">Start-Up Options</a></li>
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- <li class="toctree-l3"><a class="reference internal" href="/docs/planning-and-execution-options/">Planning and Execution Options</a></li>
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- <li class="toctree-l3"><a class="reference internal" href="/docs/persistent-configuration-storage/">Persistent Configuration Storage</a></li>
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- </ul>
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- <li class="toctree-l2 current"><a class="reference internal" href="/docs/starting-stopping-drill/">Starting/Stopping Drill</a></li>
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- <li class="toctree-l2"><a class="reference internal" href="/docs/ports-used-by-drill/">Ports Used by Drill</a></li>
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- <li class="toctree-l2"><a class="reference internal" href="/docs/partition-pruning/">Partition Pruning</a></li>
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- <li class="toctree-l2"><a class="reference internal" href="/docs/monitoring-and-canceling-queries-in-the-drill-web-ui/">Monitoring and Canceling Queries in the Drill Web UI</a></li>
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- </ul>
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- <li class="toctree-l1"><a href="javascript: void(0);">Developer Information</a></li>
- <ul style="display: none">
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- <li class="toctree-l2"><a href="javascript: void(0);">Develop Drill</a></li>
- <ul style="display: none">
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- <li class="toctree-l3"><a class="reference internal" href="/docs/compiling-drill-from-source/">Compiling Drill from Source</a></li>
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- <li class="toctree-l3"><a class="reference internal" href="/docs/drill-patch-review-tool/">Drill Patch Review Tool</a></li>
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- </ul>
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- <li class="toctree-l2"><a href="javascript: void(0);">Contribute to Drill</a></li>
- <ul style="display: none">
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- <li class="toctree-l3"><a class="reference internal" href="/docs/apache-drill-contribution-guidelines/">Apache Drill Contribution Guidelines</a></li>
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- <li class="toctree-l3"><a class="reference internal" href="/docs/apache-drill-contribution-ideas/">Apache Drill Contribution Ideas</a></li>
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- </ul>
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- <li class="toctree-l2"><a href="javascript: void(0);">Design Docs</a></li>
- <ul style="display: none">
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- <li class="toctree-l3"><a class="reference internal" href="/docs/drill-plan-syntax/">Drill Plan Syntax</a></li>
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- <li class="toctree-l3"><a class="reference internal" href="/docs/rpc-overview/">RPC Overview</a></li>
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- <li class="toctree-l2"><a class="reference internal" href="/docs/using-jdbc-with-squirrel-on-windows/">Using JDBC with SQuirreL on Windows</a></li>
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- <li class="toctree-l2"><a href="javascript: void(0);">Using ODBC on Linux and Mac OS X</a></li>
- <ul style="">
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- <li class="toctree-l3"><a class="reference internal" href="/docs/odbc-on-linux-and-mac-introduction/">ODBC on Linux and Mac Introduction</a></li>
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- <li class="toctree-l3"><a class="reference internal" href="/docs/installing-the-driver-on-linux/">Installing the Driver on Linux</a></li>
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- <li class="toctree-l3"><a class="reference internal" href="/docs/installing-the-driver-on-mac-os-x/">Installing the Driver on Mac OS X</a></li>
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- <li class="toctree-l3"><a class="reference internal" href="/docs/configuring-connections-on-linux-and-mac-os-x/">Configuring Connections on Linux and Mac OS X</a></li>
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- <li class="toctree-l3 current"><a class="reference internal" href="/docs/driver-configuration-options/">Driver Configuration Options</a></li>
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- <li class="toctree-l3"><a class="reference internal" href="/docs/using-a-connection-string/">Using a Connection String</a></li>
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- <li class="toctree-l3"><a class="reference internal" href="/docs/advanced-properties/">Advanced Properties</a></li>
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- <li class="toctree-l3"><a class="reference internal" href="/docs/testing-the-odbc-connection/">Testing the ODBC Connection</a></li>
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- </ul>
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- <li class="toctree-l2"><a href="javascript: void(0);">Using ODBC on Windows</a></li>
- <ul style="display: none">
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- <li class="toctree-l3"><a class="reference internal" href="/docs/installing-the-driver-on-windows/">Installing the Driver on Windows</a></li>
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- <li class="toctree-l3"><a class="reference internal" href="/docs/configuring-connections-on-windows/">Configuring Connections on Windows</a></li>
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- <li class="toctree-l3"><a class="reference internal" href="/docs/connecting-to-odbc-data-sources/">Connecting to ODBC Data Sources</a></li>
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- <li class="toctree-l3"><a class="reference internal" href="/docs/tableau-examples/">Tableau Examples</a></li>
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- <li class="toctree-l3"><a class="reference internal" href="/docs/using-drill-explorer-on-windows/">Using Drill Explorer on Windows</a></li>
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- </ul>
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- <li class="toctree-l2"><a class="reference internal" href="/docs/using-microstrategy-analytics-with-apache-drill/">Using MicroStrategy Analytics with Apache Drill</a></li>
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- <li class="toctree-l2"><a class="reference internal" href="/docs/using-tibco-spotfire-with-drill/">Using Tibco Spotfire with Drill</a></li>
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- <li class="toctree-l2"><a class="reference internal" href="/docs/configuring-tibco-spotfire-server-with-drill/">Configuring Tibco Spotfire Server with Drill</a></li>
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- <li class="toctree-l2"><a class="reference internal" href="/docs/using-apache-drill-with-tableau-9-desktop/">Using Apache Drill with Tableau 9 Desktop</a></li>
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- <li class="toctree-l2"><a class="reference internal" href="/docs/using-apache-drill-with-tableau-9-server/">Using Apache Drill with Tableau 9 Server</a></li>
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- </ul>
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- <li class="toctree-l1"><a href="javascript: void(0);">Query Data</a></li>
- <ul style="display: none">
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- <li class="toctree-l2"><a class="reference internal" href="/docs/query-data-introduction/">Query Data Introduction</a></li>
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- <li class="toctree-l2"><a href="javascript: void(0);">Querying a File System</a></li>
- <ul style="display: none">
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- <li class="toctree-l3"><a class="reference internal" href="/docs/querying-a-file-system-introduction/">Querying a File System Introduction</a></li>
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- <li class="toctree-l3"><a class="reference internal" href="/docs/querying-json-files/">Querying JSON Files</a></li>
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- <li class="toctree-l3"><a class="reference internal" href="/docs/querying-parquet-files/">Querying Parquet Files</a></li>
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- <li class="toctree-l3"><a class="reference internal" href="/docs/querying-plain-text-files/">Querying Plain Text Files</a></li>
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- <li class="toctree-l3"><a class="reference internal" href="/docs/querying-directories/">Querying Directories</a></li>
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- </ul>
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- <li class="toctree-l2"><a class="reference internal" href="/docs/querying-hbase/">Querying HBase</a></li>
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- <li class="toctree-l2"><a href="javascript: void(0);">Querying Complex Data</a></li>
- <ul style="display: none">
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- <li class="toctree-l3"><a class="reference internal" href="/docs/querying-complex-data-introduction/">Querying Complex Data Introduction</a></li>
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- <li class="toctree-l3"><a class="reference internal" href="/docs/sample-data-donuts/">Sample Data: Donuts</a></li>
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- <li class="toctree-l3"><a class="reference internal" href="/docs/selecting-flat-data/">Selecting Flat Data</a></li>
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- <li class="toctree-l3"><a class="reference internal" href="/docs/using-sql-functions-clauses-and-joins/">Using SQL Functions, Clauses, and Joins</a></li>
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- <li class="toctree-l3"><a class="reference internal" href="/docs/selecting-nested-data-for-a-column/">Selecting Nested Data for a Column</a></li>
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- <li class="toctree-l3"><a class="reference internal" href="/docs/selecting-multiple-columns-within-nested-data/">Selecting Multiple Columns Within Nested Data</a></li>
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- </ul>
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- <li class="toctree-l2"><a class="reference internal" href="/docs/querying-hive/">Querying Hive</a></li>
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- <li class="toctree-l2"><a class="reference internal" href="/docs/querying-the-information-schema/">Querying the INFORMATION SCHEMA</a></li>
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- <li class="toctree-l2"><a class="reference internal" href="/docs/querying-system-tables/">Querying System Tables</a></li>
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- <li class="toctree-l2"><a class="reference internal" href="/docs/monitoring-and-canceling-queries-in-the-drill-web-ui/">Monitoring and Canceling Queries in the Drill Web UI</a></li>
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-
- </ul>
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- <li class="toctree-l1"><a href="javascript: void(0);">Performance Tuning</a></li>
- <ul style="display: none">
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- <li class="toctree-l2"><a class="reference internal" href="/docs/performance-tuning-introduction/">Performance Tuning Introduction</a></li>
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- <li class="toctree-l2"><a class="reference internal" href="/docs/partition-pruning/">Partition Pruning</a></li>
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- <li class="toctree-l2"><a class="reference internal" href="/docs/choosing-a-storage-format/">Choosing a Storage Format</a></li>
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- <li class="toctree-l2"><a href="javascript: void(0);">Query Plans and Tuning</a></li>
- <ul style="display: none">
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- <li class="toctree-l3"><a class="reference internal" href="/docs/query-plans-and-tuning-introduction/">Query Plans and Tuning Introduction</a></li>
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- <li class="toctree-l3"><a class="reference internal" href="/docs/join-planning-guidelines/">Join Planning Guidelines</a></li>
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- <li class="toctree-l3"><a class="reference internal" href="/docs/guidelines-for-optimizing-aggregation/">Guidelines for Optimizing Aggregation</a></li>
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- <li class="toctree-l3"><a class="reference internal" href="/docs/modifying-query-planning-options/">Modifying Query Planning Options</a></li>
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- <li class="toctree-l3"><a class="reference internal" href="/docs/sort-based-and-hash-based-memory-constrained-operators/">Sort-Based and Hash-Based Memory-Constrained Operators</a></li>
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- <li class="toctree-l3"><a class="reference internal" href="/docs/enabling-query-queuing/">Enabling Query Queuing</a></li>
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- <li class="toctree-l3"><a class="reference internal" href="/docs/controlling-parallelization-to-balance-performance-with-multi-tenancy/">Controlling Parallelization to Balance Performance with Multi-Tenancy</a></li>
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- </ul>
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- <li class="toctree-l2"><a href="javascript: void(0);">Identifying Performance Issues</a></li>
- <ul style="display: none">
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- <li class="toctree-l3"><a class="reference internal" href="/docs/query-plans/">Query Plans</a></li>
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- <li class="toctree-l3"><a class="reference internal" href="/docs/query-profiles/">Query Profiles</a></li>
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- </ul>
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- <li class="toctree-l2"><a href="javascript: void(0);">Performance Tuning Reference</a></li>
- <ul style="display: none">
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- <li class="toctree-l3"><a class="reference internal" href="/docs/query-profile-column-descriptions/">Query Profile Column Descriptions</a></li>
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- <li class="toctree-l3"><a class="reference internal" href="/docs/physical-operators/">Physical Operators</a></li>
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- </ul>
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- </ul>
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- <li class="toctree-l1"><a href="javascript: void(0);">Log and Debug</a></li>
- <ul style="display: none">
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- <li class="toctree-l2"><a class="reference internal" href="/docs/log-and-debug-introduction/">Log and Debug Introduction</a></li>
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- <li class="toctree-l2"><a class="reference internal" href="/docs/error-messages/">Error Messages</a></li>
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- <li class="toctree-l2"><a class="reference internal" href="/docs/modify-logback-xml/">Modify logback.xml</a></li>
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- <li class="toctree-l2"><a class="reference internal" href="/docs/review-the-java-stack-trace/">Review the Java Stack Trace</a></li>
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- </ul>
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- <li class="toctree-l1"><a href="javascript: void(0);">Query Audit Logging</a></li>
- <ul style="display: none">
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- <li class="toctree-l2"><a class="reference internal" href="/docs/getting-query-information/">Getting Query Information</a></li>
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- </ul>
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- <li class="toctree-l1"><a href="javascript: void(0);">SQL Reference</a></li>
- <ul style="display: none">
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- <li class="toctree-l2"><a class="reference internal" href="/docs/sql-reference-introduction/">SQL Reference Introduction</a></li>
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- <li class="toctree-l2"><a href="javascript: void(0);">Data Types</a></li>
- <ul style="display: none">
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- <li class="toctree-l3"><a class="reference internal" href="/docs/supported-data-types/">Supported Data Types</a></li>
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- <li class="toctree-l3"><a class="reference internal" href="/docs/date-time-and-timestamp/">Date, Time, and Timestamp</a></li>
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- <li class="toctree-l3"><a class="reference internal" href="/docs/handling-different-data-types/">Handling Different Data Types</a></li>
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- </ul>
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- <li class="toctree-l2"><a class="reference internal" href="/docs/lexical-structure/">Lexical Structure</a></li>
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- <li class="toctree-l2"><a class="reference internal" href="/docs/operators/">Operators</a></li>
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- <li class="toctree-l2"><a href="javascript: void(0);">SQL Functions</a></li>
- <ul style="display: none">
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- <li class="toctree-l3"><a class="reference internal" href="/docs/about-sql-function-examples/">About SQL Function Examples</a></li>
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- <li class="toctree-l3"><a class="reference internal" href="/docs/math-and-trig/">Math and Trig</a></li>
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- <li class="toctree-l3"><a class="reference internal" href="/docs/data-type-conversion/">Data Type Conversion</a></li>
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- <li class="toctree-l3"><a class="reference internal" href="/docs/date-time-functions-and-arithmetic/">Date/Time Functions and Arithmetic</a></li>
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- <li class="toctree-l3"><a class="reference internal" href="/docs/string-manipulation/">String Manipulation</a></li>
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- <li class="toctree-l3"><a class="reference internal" href="/docs/aggregate-and-aggregate-statistical/">Aggregate and Aggregate Statistical</a></li>
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- <li class="toctree-l3"><a class="reference internal" href="/docs/functions-for-handling-nulls/">Functions for Handling Nulls</a></li>
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- </ul>
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- <li class="toctree-l2"><a href="javascript: void(0);">Nested Data Functions</a></li>
- <ul style="display: none">
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- <li class="toctree-l3"><a class="reference internal" href="/docs/nested-data-limitations/">Nested Data Limitations</a></li>
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- <li class="toctree-l3"><a class="reference internal" href="/docs/flatten/">FLATTEN</a></li>
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- <li class="toctree-l3"><a class="reference internal" href="/docs/kvgen/">KVGEN</a></li>
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- <li class="toctree-l3"><a class="reference internal" href="/docs/repeated-count/">REPEATED_COUNT</a></li>
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- <li class="toctree-l3"><a class="reference internal" href="/docs/repeated-contains/">REPEATED_CONTAINS</a></li>
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- </ul>
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- <li class="toctree-l2"><a class="reference internal" href="/docs/query-directory-functions/">Query Directory Functions</a></li>
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- <li class="toctree-l2"><a href="javascript: void(0);">SQL Commands</a></li>
- <ul style="display: none">
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- <li class="toctree-l3"><a class="reference internal" href="/docs/supported-sql-commands/">Supported SQL Commands</a></li>
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- <li class="toctree-l3"><a class="reference internal" href="/docs/alter-session/">ALTER SESSION</a></li>
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- <li class="toctree-l3"><a class="reference internal" href="/docs/alter-system/">ALTER SYSTEM</a></li>
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- <li class="toctree-l3"><a class="reference internal" href="/docs/create-table-as-ctas/">CREATE TABLE AS (CTAS)</a></li>
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- <li class="toctree-l3"><a class="reference internal" href="/docs/create-view/">CREATE VIEW</a></li>
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- <li class="toctree-l3"><a class="reference internal" href="/docs/drop-view/">DROP VIEW</a></li>
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- <li class="toctree-l3"><a class="reference internal" href="/docs/describe/">DESCRIBE</a></li>
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- <li class="toctree-l3"><a class="reference internal" href="/docs/explain/">EXPLAIN</a></li>
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- <li class="toctree-l3"><a class="reference internal" href="/docs/select/">SELECT</a></li>
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- <li class="toctree-l3"><a class="reference internal" href="/docs/select-list/">SELECT List</a></li>
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- <li class="toctree-l3"><a class="reference internal" href="/docs/from-clause/">FROM Clause</a></li>
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- <li class="toctree-l3"><a class="reference internal" href="/docs/group-by-clause/">GROUP BY Clause</a></li>
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- <li class="toctree-l3"><a class="reference internal" href="/docs/having-clause/">HAVING Clause</a></li>
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- <li class="toctree-l3"><a class="reference internal" href="/docs/limit-clause/">LIMIT Clause</a></li>
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- <li class="toctree-l3"><a class="reference internal" href="/docs/offset-clause/">OFFSET Clause</a></li>
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- <li class="toctree-l3"><a class="reference internal" href="/docs/order-by-clause/">ORDER BY Clause</a></li>
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- <li class="toctree-l3"><a class="reference internal" href="/docs/union-set-operator/">UNION Set Operator</a></li>
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- <li class="toctree-l3"><a class="reference internal" href="/docs/where-clause/">WHERE Clause</a></li>
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- <li class="toctree-l3"><a class="reference internal" href="/docs/with-clause/">WITH Clause</a></li>
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- <li class="toctree-l3"><a class="reference internal" href="/docs/show-databases-and-show-schemas/">SHOW DATABASES and SHOW SCHEMAS</a></li>
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- <li class="toctree-l3"><a class="reference internal" href="/docs/show-files/">SHOW FILES</a></li>
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- <li class="toctree-l3"><a class="reference internal" href="/docs/show-tables/">SHOW TABLES</a></li>
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- <li class="toctree-l3"><a class="reference internal" href="/docs/use/">USE</a></li>
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- </ul>
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- <li class="toctree-l2"><a href="javascript: void(0);">SQL Conditional Expressions</a></li>
- <ul style="display: none">
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- <li class="toctree-l3"><a class="reference internal" href="/docs/case/">CASE</a></li>
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- </ul>
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- <li class="toctree-l2"><a class="reference internal" href="/docs/reserved-keywords/">Reserved Keywords</a></li>
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- <li class="toctree-l2"><a class="reference internal" href="/docs/sql-extensions/">SQL Extensions</a></li>
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- </ul>
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- <li class="toctree-l1"><a href="javascript: void(0);">Data Sources and File Formats</a></li>
- <ul style="display: none">
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- <li class="toctree-l2"><a class="reference internal" href="/docs/data-sources-and-file-formats-introduction/">Data Sources and File Formats Introduction</a></li>
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- <li class="toctree-l2"><a class="reference internal" href="/docs/hive-to-drill-data-type-mapping/">Hive-to-Drill Data Type Mapping</a></li>
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- <li class="toctree-l2"><a class="reference internal" href="/docs/deploying-and-using-a-hive-udf/">Deploying and Using a Hive UDF</a></li>
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- <li class="toctree-l2"><a class="reference internal" href="/docs/parquet-format/">Parquet Format</a></li>
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- <li class="toctree-l2"><a class="reference internal" href="/docs/json-data-model/">JSON Data Model</a></li>
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- </ul>
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- <li class="toctree-l1"><a href="javascript: void(0);">Develop Custom Functions</a></li>
- <ul style="display: none">
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- <li class="toctree-l2"><a class="reference internal" href="/docs/develop-custom-functions-introduction/">Develop Custom Functions Introduction</a></li>
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- <li class="toctree-l2"><a class="reference internal" href="/docs/develop-a-simple-function/">Develop a Simple Function</a></li>
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- <li class="toctree-l2"><a class="reference internal" href="/docs/developing-an-aggregate-function/">Developing an Aggregate Function</a></li>
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- <li class="toctree-l2"><a class="reference internal" href="/docs/adding-custom-functions-to-drill/">Adding Custom Functions to Drill</a></li>
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- <li class="toctree-l2"><a class="reference internal" href="/docs/using-custom-functions-in-queries/">Using Custom Functions in Queries</a></li>
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- <li class="toctree-l2"><a class="reference internal" href="/docs/custom-function-interfaces/">Custom Function Interfaces</a></li>
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- </ul>
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- <li class="toctree-l1"><a class="reference internal" href="/docs/troubleshooting/">Troubleshooting</a></li>
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- <ul style="display: none">
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- <li class="toctree-l2"><a href="javascript: void(0);">Develop Drill</a></li>
- <ul style="display: none">
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- <li class="toctree-l3"><a class="reference internal" href="/docs/compiling-drill-from-source/">Compiling Drill from Source</a></li>
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- <li class="toctree-l3"><a class="reference internal" href="/docs/drill-patch-review-tool/">Drill Patch Review Tool</a></li>
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- </ul>
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- <li class="toctree-l2"><a href="javascript: void(0);">Contribute to Drill</a></li>
- <ul style="display: none">
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- <li class="toctree-l3"><a class="reference internal" href="/docs/apache-drill-contribution-guidelines/">Apache Drill Contribution Guidelines</a></li>
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- <li class="toctree-l3"><a class="reference internal" href="/docs/apache-drill-contribution-ideas/">Apache Drill Contribution Ideas</a></li>
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- </ul>
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- <li class="toctree-l2"><a href="javascript: void(0);">Design Docs</a></li>
- <ul style="display: none">
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- <li class="toctree-l3"><a class="reference internal" href="/docs/drill-plan-syntax/">Drill Plan Syntax</a></li>
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- <li class="toctree-l3"><a class="reference internal" href="/docs/rpc-overview/">RPC Overview</a></li>
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- <li class="toctree-l3"><a class="reference internal" href="/docs/query-stages/">Query Stages</a></li>
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- <li class="toctree-l3"><a class="reference internal" href="/docs/useful-research/">Useful Research</a></li>
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- <li class="toctree-l3"><a class="reference internal" href="/docs/value-vectors/">Value Vectors</a></li>
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- </ul>
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- </ul>
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- <li class="toctree-l1"><a href="javascript: void(0);">Release Notes</a></li>
- <ul style="display: none">
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- <li class="toctree-l2"><a class="reference internal" href="/docs/apache-drill-0-5-0-release-notes/">Apache Drill 0.5.0 Release Notes</a></li>
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- <li class="toctree-l2"><a class="reference internal" href="/docs/apache-drill-0-4-0-release-notes/">Apache Drill 0.4.0 Release Notes</a></li>
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- <li class="toctree-l2"><a class="reference internal" href="/docs/apache-drill-m1-release-notes-apache-drill-alpha/">Apache Drill M1 Release Notes (Apache Drill Alpha)</a></li>
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- <li class="toctree-l2"><a class="reference internal" href="/docs/apache-drill-m1-release-notes-apache-drill-alpha/">Apache Drill M1 Release Notes (Apache Drill Alpha)</a></li>
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- <li class="toctree-l2"><a class="reference internal" href="/docs/apache-drill-0-6-0-release-notes/">Apache Drill 0.6.0 Release Notes</a></li>
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- <li class="toctree-l2"><a class="reference internal" href="/docs/apache-drill-0-7-0-release-notes/">Apache Drill 0.7.0 Release Notes</a></li>
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- <li class="toctree-l2"><a class="reference internal" href="/docs/apache-drill-0-8-0-release-notes/">Apache Drill 0.8.0 Release Notes</a></li>
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- <li class="toctree-l2"><a class="reference internal" href="/docs/apache-drill-0-9-0-release-notes/">Apache Drill 0.9.0 Release Notes</a></li>
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- <li class="toctree-l2"><a class="reference internal" href="/docs/apache-drill-1-0-0-release-notes/">Apache Drill 1.0.0 Release Notes</a></li>
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- </ul>
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- <li class="toctree-l1"><a href="javascript: void(0);">Sample Datasets</a></li>
- <ul style="display: none">
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- <li class="toctree-l2"><a class="reference internal" href="/docs/enron-emails/">Enron Emails</a></li>
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- <li class="toctree-l2"><a class="reference internal" href="/docs/wikipedia-edit-history/">Wikipedia Edit History</a></li>
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- <ul style="display: none">
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- <li class="toctree-l2"><a class="reference internal" href="/docs/how-to-run-the-drill-demo/">How to Run the Drill Demo</a></li>
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- <li class="toctree-l2"><a class="reference internal" href="/docs/what-is-apache-drill/">What is Apache Drill</a></li>
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- <li class="toctree-l2"><a class="reference internal" href="/docs/partition-pruning/">Partition Pruning</a></li>
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- <p class="first admonition-title">Note</p>
- <p class="last">If you use a connection string to connect to your data source, then you can set these configuration properties in the connection string instead of the` odbc.ini` file. </p>
-</div>
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-<p>The following table provides a list of the configuration options with their
-descriptions:</p>
-
-<table><thead>
-<tr>
-<th>Property Name</th>
-<th>Description</th>
-</tr>
-</thead><tbody>
-<tr>
-<td>AdvancedProperties</td>
-<td>Separate advanced properties using a semi-colon (;) and then surround all advanced properties in a connection string using braces { and }. For details on supported advanced properties, see Appendix C: Advanced Properties.</td>
-</tr>
-<tr>
-<td>Catalog</td>
-<td>The name of the synthetic catalog under which all of the schemas/databases are organized: DRILL</td>
-</tr>
-<tr>
-<td>ConnectionType</td>
-<td>The following values are possible: Direct and Zookeeper. The Direct connection type connects to a Drill server using Host and Port properties in the connection string. The Zookeeper connection type connects to a Zookeeper cluster using ZKQuorum and ZKClusterID properties in the connection string.</td>
-</tr>
-<tr>
-<td>DRIVER</td>
-<td>(Required) The name of the installed driver: MapR Drill ODBC Driver</td>
-</tr>
-<tr>
-<td>Host</td>
-<td>If the ConnectionType property is set to Direct, then indicate the IP address or hostname of the Drill server using the Host property.</td>
-</tr>
-<tr>
-<td>Port</td>
-<td>If the ConnectionType property is set to Direct, then indicate the port on which the Drill server is listening using the Port property.</td>
-</tr>
-<tr>
-<td>Schema</td>
-<td>The name of the database schema to use when a schema is not explicitly specified in a query.Note: Queries on other schemas can still be issued by explicitly specifying the schema in the query.</td>
-</tr>
-<tr>
-<td>ZKClusterID</td>
-<td>If the ConnectionType property is set to ZooKeeper, then use ZKClusterID to indicate the name of the Drillbit cluster to use.</td>
-</tr>
-<tr>
-<td>ZKQuorum</td>
-<td>If the ConnectionType property is set to ZooKeeper, then use ZKQuorum to indicate the server(s) in your ZooKeeper cluster. Separate multiple servers using a comma (,).</td>
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- <li class="toctree-l3"><a class="reference internal" href="/docs/connecting-drill-explorer-to-data/">Connecting Drill Explorer to Data</a></li>
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- <li class="toctree-l3"><a class="reference internal" href="/docs/browsing-data-and-defining-views/">Browsing Data and Defining Views</a></li>
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- </ul>
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- <li class="toctree-l2"><a href="javascript: void(0);">Using Drill with BI Tools</a></li>
- <ul style="display: none">
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- <li class="toctree-l3"><a class="reference internal" href="/docs/using-drill-with-bi-tools-introduction/">Using Drill with BI Tools Introduction</a></li>
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- <li class="toctree-l3"><a class="reference internal" href="/docs/tableau-examples/">Tableau Examples</a></li>
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- <li class="toctree-l3"><a class="reference internal" href="/docs/using-microstrategy-analytics-with-apache-drill/">Using MicroStrategy Analytics with Apache Drill</a></li>
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- <li class="toctree-l3"><a class="reference internal" href="/docs/using-tibco-spotfire-desktop-with-drill/">Using Tibco Spotfire Desktop with Drill</a></li>
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- <li class="toctree-l3"><a class="reference internal" href="/docs/configuring-tibco-spotfire-server-with-drill/">Configuring Tibco Spotfire Server with Drill</a></li>
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- <li class="toctree-l3"><a class="reference internal" href="/docs/using-qlik-sense-with-drill/">Using Qlik Sense with Drill</a></li>
-
- <li class="toctree-l3"><a class="reference internal" href="/docs/using-apache-drill-with-tableau-9-desktop/">Using Apache Drill with Tableau 9 Desktop</a></li>
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- <li class="toctree-l3"><a class="reference internal" href="/docs/using-apache-drill-with-tableau-9-server/">Using Apache Drill with Tableau 9 Server</a></li>
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- <li class="toctree-l3"><a class="reference internal" href="/docs/configuring-jreport-with-drill/">Configuring JReport with Drill</a></li>
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- </ul>
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-
- </ul>
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- <li class="toctree-l1"><a href="javascript: void(0);">Query Data</a></li>
- <ul style="display: none">
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- <li class="toctree-l2"><a class="reference internal" href="/docs/query-data-introduction/">Query Data Introduction</a></li>
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- <li class="toctree-l2"><a href="javascript: void(0);">Querying a File System</a></li>
- <ul style="display: none">
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- <li class="toctree-l3"><a class="reference internal" href="/docs/querying-a-file-system-introduction/">Querying a File System Introduction</a></li>
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- <li class="toctree-l3"><a class="reference internal" href="/docs/querying-json-files/">Querying JSON Files</a></li>
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- <li class="toctree-l3"><a class="reference internal" href="/docs/querying-parquet-files/">Querying Parquet Files</a></li>
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- <li class="toctree-l3"><a class="reference internal" href="/docs/querying-plain-text-files/">Querying Plain Text Files</a></li>
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- <li class="toctree-l3"><a class="reference internal" href="/docs/querying-directories/">Querying Directories</a></li>
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- <li class="toctree-l3"><a class="reference internal" href="/docs/querying-sequence-files/">Querying Sequence Files</a></li>
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- </ul>
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- <li class="toctree-l2"><a class="reference internal" href="/docs/querying-hbase/">Querying HBase</a></li>
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- <li class="toctree-l2"><a href="javascript: void(0);">Querying Complex Data</a></li>
- <ul style="display: none">
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- <li class="toctree-l3"><a class="reference internal" href="/docs/querying-complex-data-introduction/">Querying Complex Data Introduction</a></li>
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- <li class="toctree-l3"><a class="reference internal" href="/docs/sample-data-donuts/">Sample Data: Donuts</a></li>
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- <li class="toctree-l3"><a class="reference internal" href="/docs/selecting-flat-data/">Selecting Flat Data</a></li>
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- <li class="toctree-l3"><a class="reference internal" href="/docs/using-sql-functions-clauses-and-joins/">Using SQL Functions, Clauses, and Joins</a></li>
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- <li class="toctree-l3"><a class="reference internal" href="/docs/selecting-nested-data-for-a-column/">Selecting Nested Data for a Column</a></li>
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- <li class="toctree-l3"><a class="reference internal" href="/docs/selecting-multiple-columns-within-nested-data/">Selecting Multiple Columns Within Nested Data</a></li>
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- </ul>
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- <li class="toctree-l2"><a class="reference internal" href="/docs/querying-hive/">Querying Hive</a></li>
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- <li class="toctree-l2"><a class="reference internal" href="/docs/querying-the-information-schema/">Querying the INFORMATION SCHEMA</a></li>
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- <li class="toctree-l2"><a class="reference internal" href="/docs/querying-system-tables/">Querying System Tables</a></li>
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- <li class="toctree-l2"><a class="reference internal" href="/docs/monitoring-and-canceling-queries-in-the-drill-web-console/">Monitoring and Canceling Queries in the Drill Web Console</a></li>
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-
- </ul>
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- <li class="toctree-l1 current_section "><a href="javascript: void(0);">Performance Tuning</a></li>
- <ul class="current_section">
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- <li class="toctree-l2"><a class="reference internal" href="/docs/performance-tuning-introduction/">Performance Tuning Introduction</a></li>
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- <li class="toctree-l2"><a href="javascript: void(0);">Partition Pruning</a></li>
- <ul style="">
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- <li class="toctree-l3"><a class="reference internal" href="/docs/partition-pruning-introduction/">Partition Pruning Introduction</a></li>
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- <li class="toctree-l3 current"><a class="reference internal" href="/docs/migrating-partitioned-data/">Migrating Partitioned Data</a></li>
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- <li class="toctree-l3"><a class="reference internal" href="/docs/how-to-partition-data/">How to Partition Data</a></li>
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- </ul>
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- <li class="toctree-l2"><a class="reference internal" href="/docs/optimizing-parquet-metadata-reading/">Optimizing Parquet Metadata Reading</a></li>
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- <li class="toctree-l2"><a class="reference internal" href="/docs/choosing-a-storage-format/">Choosing a Storage Format</a></li>
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- <li class="toctree-l2"><a href="javascript: void(0);">Query Plans and Tuning</a></li>
- <ul style="display: none">
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- <li class="toctree-l3"><a class="reference internal" href="/docs/query-plans-and-tuning-introduction/">Query Plans and Tuning Introduction</a></li>
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- <li class="toctree-l3"><a class="reference internal" href="/docs/join-planning-guidelines/">Join Planning Guidelines</a></li>
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- <li class="toctree-l3"><a class="reference internal" href="/docs/guidelines-for-optimizing-aggregation/">Guidelines for Optimizing Aggregation</a></li>
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- <li class="toctree-l3"><a class="reference internal" href="/docs/modifying-query-planning-options/">Modifying Query Planning Options</a></li>
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- <li class="toctree-l3"><a class="reference internal" href="/docs/sort-based-and-hash-based-memory-constrained-operators/">Sort-Based and Hash-Based Memory-Constrained Operators</a></li>
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- <li class="toctree-l3"><a class="reference internal" href="/docs/enabling-query-queuing/">Enabling Query Queuing</a></li>
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- <li class="toctree-l3"><a class="reference internal" href="/docs/controlling-parallelization-to-balance-performance-with-multi-tenancy/">Controlling Parallelization to Balance Performance with Multi-Tenancy</a></li>
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- </ul>
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-
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- <li class="toctree-l2"><a href="javascript: void(0);">Identifying Performance Issues</a></li>
- <ul style="display: none">
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- <li class="toctree-l3"><a class="reference internal" href="/docs/query-plans/">Query Plans</a></li>
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- <li class="toctree-l3"><a class="reference internal" href="/docs/query-profiles/">Query Profiles</a></li>
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- </ul>
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- <li class="toctree-l2"><a href="javascript: void(0);">Performance Tuning Reference</a></li>
- <ul style="display: none">
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- <li class="toctree-l3"><a class="reference internal" href="/docs/query-profile-column-descriptions/">Query Profile Column Descriptions</a></li>
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- <li class="toctree-l3"><a class="reference internal" href="/docs/physical-operators/">Physical Operators</a></li>
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- </ul>
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-
- </ul>
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- <li class="toctree-l1"><a href="javascript: void(0);">Log and Debug</a></li>
- <ul style="display: none">
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- <li class="toctree-l2"><a class="reference internal" href="/docs/log-and-debug-introduction/">Log and Debug Introduction</a></li>
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- <li class="toctree-l2"><a class="reference internal" href="/docs/error-messages/">Error Messages</a></li>
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- <li class="toctree-l2"><a class="reference internal" href="/docs/modify-logback-xml/">Modify logback.xml</a></li>
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- <li class="toctree-l2"><a class="reference internal" href="/docs/review-the-java-stack-trace/">Review the Java Stack Trace</a></li>
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- <li class="toctree-l2"><a class="reference internal" href="/docs/query-audit-logging/">Query Audit Logging</a></li>
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- </ul>
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- <li class="toctree-l1"><a href="javascript: void(0);">SQL Reference</a></li>
- <ul style="display: none">
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- <li class="toctree-l2"><a class="reference internal" href="/docs/sql-reference-introduction/">SQL Reference Introduction</a></li>
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- <li class="toctree-l2"><a href="javascript: void(0);">Data Types</a></li>
- <ul style="display: none">
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- <li class="toctree-l3"><a class="reference internal" href="/docs/supported-data-types/">Supported Data Types</a></li>
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- <li class="toctree-l3"><a class="reference internal" href="/docs/date-time-and-timestamp/">Date, Time, and Timestamp</a></li>
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- <li class="toctree-l3"><a class="reference internal" href="/docs/handling-different-data-types/">Handling Different Data Types</a></li>
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- </ul>
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- <li class="toctree-l2"><a class="reference internal" href="/docs/lexical-structure/">Lexical Structure</a></li>
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- <li class="toctree-l2"><a class="reference internal" href="/docs/operators/">Operators</a></li>
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- <li class="toctree-l2"><a href="javascript: void(0);">SQL Functions</a></li>
- <ul style="display: none">
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- <li class="toctree-l3"><a class="reference internal" href="/docs/about-sql-function-examples/">About SQL Function Examples</a></li>
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- <li class="toctree-l3"><a class="reference internal" href="/docs/math-and-trig/">Math and Trig</a></li>
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- <li class="toctree-l3"><a class="reference internal" href="/docs/data-type-conversion/">Data Type Conversion</a></li>
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- <li class="toctree-l3"><a class="reference internal" href="/docs/date-time-functions-and-arithmetic/">Date/Time Functions and Arithmetic</a></li>
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- <li class="toctree-l3"><a class="reference internal" href="/docs/string-manipulation/">String Manipulation</a></li>
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- <li class="toctree-l3"><a class="reference internal" href="/docs/aggregate-and-aggregate-statistical/">Aggregate and Aggregate Statistical</a></li>
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- <li class="toctree-l3"><a class="reference internal" href="/docs/functions-for-handling-nulls/">Functions for Handling Nulls</a></li>
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- </ul>
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- <li class="toctree-l2"><a href="javascript: void(0);">SQL Window Functions</a></li>
- <ul style="display: none">
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- <li class="toctree-l3"><a class="reference internal" href="/docs/sql-window-functions-introduction/">SQL Window Functions Introduction</a></li>
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- <li class="toctree-l3"><a class="reference internal" href="/docs/aggregate-window-functions/">Aggregate Window Functions</a></li>
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- <li class="toctree-l3"><a class="reference internal" href="/docs/ranking-window-functions/">Ranking Window Functions</a></li>
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- <li class="toctree-l3"><a class="reference internal" href="/docs/value-window-functions/">Value Window Functions</a></li>
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- <li class="toctree-l3"><a class="reference internal" href="/docs/sql-window-functions-examples/">SQL Window Functions Examples</a></li>
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- </ul>
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- <li class="toctree-l2"><a href="javascript: void(0);">Nested Data Functions</a></li>
- <ul style="display: none">
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- <li class="toctree-l3"><a class="reference internal" href="/docs/nested-data-limitations/">Nested Data Limitations</a></li>
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- <li class="toctree-l3"><a class="reference internal" href="/docs/flatten/">FLATTEN</a></li>
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- <li class="toctree-l3"><a class="reference internal" href="/docs/kvgen/">KVGEN</a></li>
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- <li class="toctree-l3"><a class="reference internal" href="/docs/repeated-count/">REPEATED_COUNT</a></li>
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- <li class="toctree-l3"><a class="reference internal" href="/docs/repeated-contains/">REPEATED_CONTAINS</a></li>
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- </ul>
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- <li class="toctree-l2"><a class="reference internal" href="/docs/query-directory-functions/">Query Directory Functions</a></li>
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- <li class="toctree-l2"><a href="javascript: void(0);">SQL Commands</a></li>
- <ul style="display: none">
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- <li class="toctree-l3"><a class="reference internal" href="/docs/supported-sql-commands/">Supported SQL Commands</a></li>
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- <li class="toctree-l3"><a class="reference internal" href="/docs/set/">SET</a></li>
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- <li class="toctree-l3"><a class="reference internal" href="/docs/reset/">RESET</a></li>
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- <li class="toctree-l3"><a class="reference internal" href="/docs/alter-system/">ALTER SYSTEM</a></li>
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- <li class="toctree-l3"><a class="reference internal" href="/docs/create-table-as-ctas/">CREATE TABLE AS (CTAS)</a></li>
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- <li class="toctree-l3"><a class="reference internal" href="/docs/partition-by-clause/">PARTITION BY Clause</a></li>
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- <li class="toctree-l3"><a class="reference internal" href="/docs/create-view/">CREATE VIEW</a></li>
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- <li class="toctree-l3"><a class="reference internal" href="/docs/describe/">DESCRIBE</a></li>
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- <li class="toctree-l3"><a class="reference internal" href="/docs/drop-table/">DROP TABLE</a></li>
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- <li class="toctree-l3"><a class="reference internal" href="/docs/drop-view/">DROP VIEW</a></li>
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- <li class="toctree-l3"><a class="reference internal" href="/docs/explain/">EXPLAIN</a></li>
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- <li class="toctree-l3"><a class="reference internal" href="/docs/select/">SELECT</a></li>
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- <li class="toctree-l3"><a class="reference internal" href="/docs/select-list/">SELECT List</a></li>
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- <li class="toctree-l3"><a class="reference internal" href="/docs/from-clause/">FROM Clause</a></li>
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- <li class="toctree-l3"><a class="reference internal" href="/docs/group-by-clause/">GROUP BY Clause</a></li>
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- <li class="toctree-l3"><a class="reference internal" href="/docs/having-clause/">HAVING Clause</a></li>
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- <li class="toctree-l3"><a class="reference internal" href="/docs/limit-clause/">LIMIT Clause</a></li>
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- <li class="toctree-l3"><a class="reference internal" href="/docs/offset-clause/">OFFSET Clause</a></li>
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- <li class="toctree-l3"><a class="reference internal" href="/docs/order-by-clause/">ORDER BY Clause</a></li>
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- <li class="toctree-l3"><a class="reference internal" href="/docs/union-set-operator/">UNION Set Operator</a></li>
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- <li class="toctree-l3"><a class="reference internal" href="/docs/where-clause/">WHERE Clause</a></li>
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- <li class="toctree-l3"><a class="reference internal" href="/docs/with-clause/">WITH Clause</a></li>
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- <li class="toctree-l3"><a class="reference internal" href="/docs/show-databases-and-show-schemas/">SHOW DATABASES and SHOW SCHEMAS</a></li>
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- <li class="toctree-l3"><a class="reference internal" href="/docs/show-files/">SHOW FILES</a></li>
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- <li class="toctree-l3"><a class="reference internal" href="/docs/show-tables/">SHOW TABLES</a></li>
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- <li class="toctree-l3"><a class="reference internal" href="/docs/use/">USE</a></li>
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- </ul>
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- <li class="toctree-l2"><a href="javascript: void(0);">SQL Conditional Expressions</a></li>
- <ul style="display: none">
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- <li class="toctree-l3"><a class="reference internal" href="/docs/case/">CASE</a></li>
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- </ul>
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- <li class="toctree-l2"><a class="reference internal" href="/docs/reserved-keywords/">Reserved Keywords</a></li>
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- <li class="toctree-l2"><a class="reference internal" href="/docs/sql-extensions/">SQL Extensions</a></li>
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- </ul>
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- <li class="toctree-l1"><a href="javascript: void(0);">Data Sources and File Formats</a></li>
- <ul style="display: none">
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- <li class="toctree-l2"><a class="reference internal" href="/docs/data-sources-and-file-formats-introduction/">Data Sources and File Formats Introduction</a></li>
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- <li class="toctree-l2"><a class="reference internal" href="/docs/hive-to-drill-data-type-mapping/">Hive-to-Drill Data Type Mapping</a></li>
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- <li class="toctree-l2"><a class="reference internal" href="/docs/deploying-and-using-a-hive-udf/">Deploying and Using a Hive UDF</a></li>
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- <li class="toctree-l2"><a class="reference internal" href="/docs/parquet-format/">Parquet Format</a></li>
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- <li class="toctree-l2"><a class="reference internal" href="/docs/json-data-model/">JSON Data Model</a></li>
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- <li class="toctree-l2"><a class="reference internal" href="/docs/text-files-csv-tsv-psv/">Text Files: CSV, TSV, PSV</a></li>
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- <li class="toctree-l2"><a class="reference internal" href="/docs/sequence-files/">Sequence Files</a></li>
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- </ul>
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- <li class="toctree-l1"><a href="javascript: void(0);">Develop Custom Functions</a></li>
- <ul style="display: none">
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- <li class="toctree-l2"><a class="reference internal" href="/docs/develop-custom-functions-introduction/">Develop Custom Functions Introduction</a></li>
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- <li class="toctree-l2"><a class="reference internal" href="/docs/developing-a-simple-function/">Developing a Simple Function</a></li>
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- <li class="toctree-l2"><a class="reference internal" href="/docs/tutorial-develop-a-simple-function/">Tutorial: Develop a Simple Function</a></li>
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- <li class="toctree-l2"><a class="reference internal" href="/docs/developing-an-aggregate-function/">Developing an Aggregate Function</a></li>
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- <li class="toctree-l2"><a class="reference internal" href="/docs/adding-custom-functions-to-drill/">Adding Custom Functions to Drill</a></li>
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- <li class="toctree-l2"><a class="reference internal" href="/docs/using-custom-functions-in-queries/">Using Custom Functions in Queries</a></li>
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- <li class="toctree-l2"><a class="reference internal" href="/docs/custom-function-interfaces/">Custom Function Interfaces</a></li>
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- </ul>
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- <li class="toctree-l1"><a class="reference internal" href="/docs/troubleshooting/">Troubleshooting</a></li>
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- <ul style="display: none">
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- <li class="toctree-l2"><a class="reference internal" href="/docs/rest-api/">REST API</a></li>
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- <li class="toctree-l2"><a href="javascript: void(0);">Develop Drill</a></li>
- <ul style="display: none">
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- <li class="toctree-l3"><a class="reference internal" href="/docs/compiling-drill-from-source/">Compiling Drill from Source</a></li>
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- <li class="toctree-l3"><a class="reference internal" href="/docs/drill-patch-review-tool/">Drill Patch Review Tool</a></li>
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- </ul>
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- <li class="toctree-l2"><a href="javascript: void(0);">Contribute to Drill</a></li>
- <ul style="display: none">
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- <li class="toctree-l3"><a class="reference internal" href="/docs/apache-drill-contribution-guidelines/">Apache Drill Contribution Guidelines</a></li>
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- <li class="toctree-l3"><a class="reference internal" href="/docs/apache-drill-contribution-ideas/">Apache Drill Contribution Ideas</a></li>
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- </ul>
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- <li class="toctree-l2"><a href="javascript: void(0);">Design Docs</a></li>
- <ul style="display: none">
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- <li class="toctree-l3"><a class="reference internal" href="/docs/drill-plan-syntax/">Drill Plan Syntax</a></li>
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- <li class="toctree-l3"><a class="reference internal" href="/docs/rpc-overview/">RPC Overview</a></li>
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- <li class="toctree-l3"><a class="reference internal" href="/docs/query-stages/">Query Stages</a></li>
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- <li class="toctree-l3"><a class="reference internal" href="/docs/useful-research/">Useful Research</a></li>
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- <li class="toctree-l3"><a class="reference internal" href="/docs/value-vectors/">Value Vectors</a></li>
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- </ul>
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- </ul>
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- <li class="toctree-l1"><a href="javascript: void(0);">Release Notes</a></li>
- <ul style="display: none">
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- <li class="toctree-l2"><a class="reference internal" href="/docs/apache-drill-1-4-0-release-notes/">Apache Drill 1.4.0 Release Notes</a></li>
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- <li class="toctree-l2"><a class="reference internal" href="/docs/apache-drill-1-3-0-release-notes/">Apache Drill 1.3.0 Release Notes</a></li>
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- <li class="toctree-l2"><a class="reference internal" href="/docs/apache-drill-1-2-0-release-notes/">Apache Drill 1.2.0 Release Notes</a></li>
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- <li class="toctree-l2"><a class="reference internal" href="/docs/apache-drill-1-1-0-release-notes/">Apache Drill 1.1.0 Release Notes</a></li>
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- <li class="toctree-l2"><a class="reference internal" href="/docs/apache-drill-1-0-0-release-notes/">Apache Drill 1.0.0 Release Notes</a></li>
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- <li class="toctree-l2"><a class="reference internal" href="/docs/apache-drill-0-9-0-release-notes/">Apache Drill 0.9.0 Release Notes</a></li>
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- <li class="toctree-l2"><a class="reference internal" href="/docs/apache-drill-0-8-0-release-notes/">Apache Drill 0.8.0 Release Notes</a></li>
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- <li class="toctree-l2"><a class="reference internal" href="/docs/apache-drill-0-7-0-release-notes/">Apache Drill 0.7.0 Release Notes</a></li>
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- <li class="toctree-l2"><a class="reference internal" href="/docs/apache-drill-0-6-0-release-notes/">Apache Drill 0.6.0 Release Notes</a></li>
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- <li class="toctree-l2"><a class="reference internal" href="/docs/apache-drill-m1-release-notes-apache-drill-alpha/">Apache Drill M1 Release Notes (Apache Drill Alpha)</a></li>
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- <p class="last"> Run the upgrade tool only on Drill-generated Parquet files. </p>
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-<!-- as described in [DRILL-4070](https://issues.apache.org/jira/browse/DRILL-4070). -->
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-<h2 id="why-migrate-drill-1-1-1-2-data">Why Migrate Drill 1.1-1.2 Data</h2>
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-<p>Parquet data partitioning became available in Drill 1.1 with the introduction of the PARTITION BY clause of the CTAS command. Drill 1.3 uses the latest (as of the 1.3 release date) Apache Parquet Library from when generating and partitioning Parquet files, whereas Drill 1.1 and 1.2 use a version of a previous Parquet Library created by the Drill team. The Drill team fixed a bug in the previous Library to accurately process Parquet files generated by other tools, such as Impala and Hive. Apache Parquet fixed the bug in the latest Library, making it suitable for use in Drill 1.3. Drill now uses the same Apache Parquet Library as Impala, Hive, and other software. You need to run the upgrade tool on Parquet files generated by Drill 1.1 and 1.2 that used the previous Library. </p>
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-<p>The upgrade tool simply inserts a version number in the metadata to mark the file as a Drill file. </p>
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-<!-- The bug fix eliminated the risk of inaccurate metadata that could cause incorrect results when querying Hive- and Pig-generated Parquet files. No such risk exists with Drill-generated Parquet files. Querying Drill-generated Parquet files, regardless of the Drill version, yields accurate results. Drill-generated Parquet files, regardless of the Drill release, contain accurate metadata. -->
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-<h2 id="preparing-for-the-migration">Preparing for the Migration</h2>
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-<p>Set aside sufficient time for the migration. In a test by Drill developers, it took 32 minutes to upgrade 1TB data in 840 files and 370 minutes to upgrade 100 GB data in 200k files. Although the size of files is a factor in the upgrade time, the number of files is the most significant factor.</p>
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-<p>System administrators can write a shell script to run the upgrade tool simultaneously on multiple sub-directories.</p>
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-<p>Use the <a href="https://github.com/parthchandra/drill-upgrade">drill-upgrade tool</a> to modify one file at a time. The <code>temp</code> directory or directories hold a copy for recovery of the file(s) currently being modified in the event of a system failure. Inspecting the <code>temp</code> directory can also indicate the success or failure of an unattended migration.</p>
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-<p>To migrate Parquet data for use in Drill 1.3 that you partitioned and generated in Drill 1.1 or 1.2, follow these steps:</p>
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- <p class="first admonition-title">Important</p>
- <p class="last"> Run the upgrade tool only on Drill-generated Parquet files. </p>
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-<ol>
-<li>Back up the data to be migrated.<br></li>
-<li>Create one or more temp directories, depending on how you plan to run the upgrade tool, on the same file system as the data.<br>
-For example, if the data is on HDFS, create the temp directory on HDFS.
-Create distinct temp directories when you run the upgrade tool simultaneously on multiple directories as different directories can have files with same names.<br></li>
-<li>Access the upgrade tool at TBD.<br></li>
-<li>If you use <a href="/docs/optimizing-parquet-metadata-reading/#how-to-trigger-generation-of-the-parquet-metadata-cache-file">Parquet metadata caching</a>:<br>
-
-<ul>
-<li>Delete the cache file you generated from all directories and subdirectories where you plan to run the upgrade tool.<br></li>
-<li>Run REFRESH TABLE METADATA on all the folders where a cache file previously existed.<br></li>
-</ul></li>
-<li>Run the upgrade tool as shown in the following example:<br>
- java -Dlog.path=/<your path>/drill-upgrade/upgrade.log -cp drill-upgrade-1.0-jar-with-dependencies.jar org.apache.drill.upgrade.Upgrade_12_13 --tempDir=maprfs:///drill/upgrade-temp maprfs:///drill/testdata/</li>
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-<p>If a network connection goes down, or if a user cancels the operation, the file that was being processed at the time of cancellation could be corrupted. To recover from such a situation, perform the following steps:</p>
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-<ol>
-<li>Copy the file back from the temp directory to your directory of Parquet files. </li>
-<li>Re-run the upgrade tool.</li>
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- <li class="toctree-l2"><a class="reference internal" href="/docs/using-jdbc-with-squirrel-on-windows/">Using JDBC with SQuirreL on Windows</a></li>
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- <li class="toctree-l2"><a href="javascript: void(0);">Using ODBC on Linux and Mac OS X</a></li>
- <ul style="display: none">
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- <li class="toctree-l3"><a class="reference internal" href="/docs/odbc-on-linux-and-mac-introduction/">ODBC on Linux and Mac Introduction</a></li>
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- <li class="toctree-l3"><a class="reference internal" href="/docs/installing-the-driver-on-linux/">Installing the Driver on Linux</a></li>
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- <li class="toctree-l3"><a class="reference internal" href="/docs/installing-the-driver-on-mac-os-x/">Installing the Driver on Mac OS X</a></li>
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- <li class="toctree-l3"><a class="reference internal" href="/docs/configuring-connections-on-linux-and-mac-os-x/">Configuring Connections on Linux and Mac OS X</a></li>
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- <li class="toctree-l3"><a class="reference internal" href="/docs/driver-configuration-options/">Driver Configuration Options</a></li>
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- <li class="toctree-l3"><a class="reference internal" href="/docs/using-a-connection-string/">Using a Connection String</a></li>
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- <li class="toctree-l3"><a class="reference internal" href="/docs/advanced-properties/">Advanced Properties</a></li>
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- <li class="toctree-l3"><a class="reference internal" href="/docs/testing-the-odbc-connection/">Testing the ODBC Connection</a></li>
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- </ul>
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- <li class="toctree-l2"><a href="javascript: void(0);">Using ODBC on Windows</a></li>
- <ul style="display: none">
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- <li class="toctree-l3"><a class="reference internal" href="/docs/installing-the-driver-on-windows/">Installing the Driver on Windows</a></li>
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- <li class="toctree-l3"><a class="reference internal" href="/docs/configuring-connections-on-windows/">Configuring Connections on Windows</a></li>
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- <li class="toctree-l3"><a class="reference internal" href="/docs/connecting-to-odbc-data-sources/">Connecting to ODBC Data Sources</a></li>
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- <li class="toctree-l3"><a class="reference internal" href="/docs/tableau-examples/">Tableau Examples</a></li>
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- <li class="toctree-l3"><a class="reference internal" href="/docs/using-drill-explorer-on-windows/">Using Drill Explorer on Windows</a></li>
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- </ul>
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- <li class="toctree-l2"><a class="reference internal" href="/docs/using-microstrategy-analytics-with-apache-drill/">Using MicroStrategy Analytics with Apache Drill</a></li>
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- <li class="toctree-l2"><a class="reference internal" href="/docs/using-tibco-spotfire-with-drill/">Using Tibco Spotfire with Drill</a></li>
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- <li class="toctree-l2"><a class="reference internal" href="/docs/configuring-tibco-spotfire-server-with-drill/">Configuring Tibco Spotfire Server with Drill</a></li>
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- <li class="toctree-l2"><a class="reference internal" href="/docs/using-apache-drill-with-tableau-9-desktop/">Using Apache Drill with Tableau 9 Desktop</a></li>
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- <li class="toctree-l2"><a class="reference internal" href="/docs/using-apache-drill-with-tableau-9-server/">Using Apache Drill with Tableau 9 Server</a></li>
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- </ul>
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- <li class="toctree-l1"><a href="javascript: void(0);">Query Data</a></li>
- <ul style="display: none">
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- <li class="toctree-l2"><a class="reference internal" href="/docs/query-data-introduction/">Query Data Introduction</a></li>
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- <li class="toctree-l2"><a href="javascript: void(0);">Querying a File System</a></li>
- <ul style="display: none">
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- <li class="toctree-l3"><a class="reference internal" href="/docs/querying-a-file-system-introduction/">Querying a File System Introduction</a></li>
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- <li class="toctree-l3"><a class="reference internal" href="/docs/querying-json-files/">Querying JSON Files</a></li>
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- <li class="toctree-l3"><a class="reference internal" href="/docs/querying-parquet-files/">Querying Parquet Files</a></li>
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- <li class="toctree-l3"><a class="reference internal" href="/docs/querying-plain-text-files/">Querying Plain Text Files</a></li>
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- <li class="toctree-l3"><a class="reference internal" href="/docs/querying-directories/">Querying Directories</a></li>
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- </ul>
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- <li class="toctree-l2"><a class="reference internal" href="/docs/querying-hbase/">Querying HBase</a></li>
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- <li class="toctree-l2"><a href="javascript: void(0);">Querying Complex Data</a></li>
- <ul style="display: none">
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- <li class="toctree-l3"><a class="reference internal" href="/docs/querying-complex-data-introduction/">Querying Complex Data Introduction</a></li>
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- <li class="toctree-l3"><a class="reference internal" href="/docs/sample-data-donuts/">Sample Data: Donuts</a></li>
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- <li class="toctree-l3"><a class="reference internal" href="/docs/selecting-flat-data/">Selecting Flat Data</a></li>
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- <li class="toctree-l3"><a class="reference internal" href="/docs/using-sql-functions-clauses-and-joins/">Using SQL Functions, Clauses, and Joins</a></li>
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- <li class="toctree-l3"><a class="reference internal" href="/docs/selecting-nested-data-for-a-column/">Selecting Nested Data for a Column</a></li>
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- <li class="toctree-l3"><a class="reference internal" href="/docs/selecting-multiple-columns-within-nested-data/">Selecting Multiple Columns Within Nested Data</a></li>
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- </ul>
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- <li class="toctree-l2"><a class="reference internal" href="/docs/querying-hive/">Querying Hive</a></li>
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- <li class="toctree-l2"><a class="reference internal" href="/docs/querying-the-information-schema/">Querying the INFORMATION SCHEMA</a></li>
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- <li class="toctree-l2"><a class="reference internal" href="/docs/querying-system-tables/">Querying System Tables</a></li>
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- <li class="toctree-l2"><a class="reference internal" href="/docs/monitoring-and-canceling-queries-in-the-drill-web-ui/">Monitoring and Canceling Queries in the Drill Web UI</a></li>
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-
- </ul>
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- <li class="toctree-l1"><a href="javascript: void(0);">Performance Tuning</a></li>
- <ul style="display: none">
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- <li class="toctree-l2"><a class="reference internal" href="/docs/performance-tuning-introduction/">Performance Tuning Introduction</a></li>
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- <li class="toctree-l2"><a class="reference internal" href="/docs/partition-pruning/">Partition Pruning</a></li>
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- <li class="toctree-l2"><a class="reference internal" href="/docs/choosing-a-storage-format/">Choosing a Storage Format</a></li>
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- <li class="toctree-l2"><a href="javascript: void(0);">Query Plans and Tuning</a></li>
- <ul style="display: none">
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- <li class="toctree-l3"><a class="reference internal" href="/docs/query-plans-and-tuning-introduction/">Query Plans and Tuning Introduction</a></li>
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- <li class="toctree-l3"><a class="reference internal" href="/docs/join-planning-guidelines/">Join Planning Guidelines</a></li>
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- <li class="toctree-l3"><a class="reference internal" href="/docs/guidelines-for-optimizing-aggregation/">Guidelines for Optimizing Aggregation</a></li>
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- <li class="toctree-l3"><a class="reference internal" href="/docs/modifying-query-planning-options/">Modifying Query Planning Options</a></li>
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- <li class="toctree-l3"><a class="reference internal" href="/docs/sort-based-and-hash-based-memory-constrained-operators/">Sort-Based and Hash-Based Memory-Constrained Operators</a></li>
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- <li class="toctree-l3"><a class="reference internal" href="/docs/enabling-query-queuing/">Enabling Query Queuing</a></li>
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- <li class="toctree-l3"><a class="reference internal" href="/docs/controlling-parallelization-to-balance-performance-with-multi-tenancy/">Controlling Parallelization to Balance Performance with Multi-Tenancy</a></li>
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- </ul>
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- <li class="toctree-l2"><a href="javascript: void(0);">Identifying Performance Issues</a></li>
- <ul style="display: none">
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- <li class="toctree-l3"><a class="reference internal" href="/docs/query-plans/">Query Plans</a></li>
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- <li class="toctree-l3"><a class="reference internal" href="/docs/query-profiles/">Query Profiles</a></li>
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- </ul>
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- <li class="toctree-l2"><a href="javascript: void(0);">Performance Tuning Reference</a></li>
- <ul style="display: none">
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- <li class="toctree-l3"><a class="reference internal" href="/docs/query-profile-column-descriptions/">Query Profile Column Descriptions</a></li>
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- <li class="toctree-l3"><a class="reference internal" href="/docs/physical-operators/">Physical Operators</a></li>
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- </ul>
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- </ul>
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- <li class="toctree-l1"><a href="javascript: void(0);">Log and Debug</a></li>
- <ul style="display: none">
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- <li class="toctree-l2"><a class="reference internal" href="/docs/log-and-debug-introduction/">Log and Debug Introduction</a></li>
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- <li class="toctree-l2"><a class="reference internal" href="/docs/error-messages/">Error Messages</a></li>
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- <li class="toctree-l2"><a class="reference internal" href="/docs/modify-logback-xml/">Modify logback.xml</a></li>
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- <li class="toctree-l2"><a class="reference internal" href="/docs/review-the-java-stack-trace/">Review the Java Stack Trace</a></li>
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- </ul>
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-
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- <li class="toctree-l1 current_section "><a href="javascript: void(0);">Query Audit Logging</a></li>
- <ul class="current_section">
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- <li class="toctree-l2 current"><a class="reference internal" href="/docs/getting-query-information/">Getting Query Information</a></li>
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- </ul>
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- <li class="toctree-l1"><a href="javascript: void(0);">SQL Reference</a></li>
- <ul style="display: none">
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- <li class="toctree-l2"><a class="reference internal" href="/docs/sql-reference-introduction/">SQL Reference Introduction</a></li>
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- <li class="toctree-l2"><a href="javascript: void(0);">Data Types</a></li>
- <ul style="display: none">
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- <li class="toctree-l3"><a class="reference internal" href="/docs/supported-data-types/">Supported Data Types</a></li>
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- <li class="toctree-l3"><a class="reference internal" href="/docs/date-time-and-timestamp/">Date, Time, and Timestamp</a></li>
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- <li class="toctree-l3"><a class="reference internal" href="/docs/handling-different-data-types/">Handling Different Data Types</a></li>
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- </ul>
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- <li class="toctree-l2"><a class="reference internal" href="/docs/lexical-structure/">Lexical Structure</a></li>
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- <li class="toctree-l2"><a class="reference internal" href="/docs/operators/">Operators</a></li>
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- <li class="toctree-l2"><a href="javascript: void(0);">SQL Functions</a></li>
- <ul style="display: none">
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- <li class="toctree-l3"><a class="reference internal" href="/docs/about-sql-function-examples/">About SQL Function Examples</a></li>
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- <li class="toctree-l3"><a class="reference internal" href="/docs/math-and-trig/">Math and Trig</a></li>
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- <li class="toctree-l3"><a class="reference internal" href="/docs/data-type-conversion/">Data Type Conversion</a></li>
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- <li class="toctree-l3"><a class="reference internal" href="/docs/date-time-functions-and-arithmetic/">Date/Time Functions and Arithmetic</a></li>
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- <li class="toctree-l3"><a class="reference internal" href="/docs/string-manipulation/">String Manipulation</a></li>
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- <li class="toctree-l3"><a class="reference internal" href="/docs/aggregate-and-aggregate-statistical/">Aggregate and Aggregate Statistical</a></li>
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- <li class="toctree-l3"><a class="reference internal" href="/docs/functions-for-handling-nulls/">Functions for Handling Nulls</a></li>
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- </ul>
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-
-
- <li class="toctree-l2"><a href="javascript: void(0);">Nested Data Functions</a></li>
- <ul style="display: none">
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- <li class="toctree-l3"><a class="reference internal" href="/docs/nested-data-limitations/">Nested Data Limitations</a></li>
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- <li class="toctree-l3"><a class="reference internal" href="/docs/flatten/">FLATTEN</a></li>
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- <li class="toctree-l3"><a class="reference internal" href="/docs/kvgen/">KVGEN</a></li>
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- <li class="toctree-l3"><a class="reference internal" href="/docs/repeated-count/">REPEATED_COUNT</a></li>
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- <li class="toctree-l3"><a class="reference internal" href="/docs/repeated-contains/">REPEATED_CONTAINS</a></li>
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- </ul>
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- <li class="toctree-l2"><a class="reference internal" href="/docs/query-directory-functions/">Query Directory Functions</a></li>
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- <li class="toctree-l2"><a href="javascript: void(0);">SQL Commands</a></li>
- <ul style="display: none">
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- <li class="toctree-l3"><a class="reference internal" href="/docs/supported-sql-commands/">Supported SQL Commands</a></li>
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- <li class="toctree-l3"><a class="reference internal" href="/docs/alter-session/">ALTER SESSION</a></li>
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- <li class="toctree-l3"><a class="reference internal" href="/docs/alter-system/">ALTER SYSTEM</a></li>
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- <li class="toctree-l3"><a class="reference internal" href="/docs/create-table-as-ctas/">CREATE TABLE AS (CTAS)</a></li>
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- <li class="toctree-l3"><a class="reference internal" href="/docs/create-view/">CREATE VIEW</a></li>
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- <li class="toctree-l3"><a class="reference internal" href="/docs/drop-view/">DROP VIEW</a></li>
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- <li class="toctree-l3"><a class="reference internal" href="/docs/describe/">DESCRIBE</a></li>
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- <li class="toctree-l3"><a class="reference internal" href="/docs/explain/">EXPLAIN</a></li>
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- <li class="toctree-l3"><a class="reference internal" href="/docs/select/">SELECT</a></li>
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- <li class="toctree-l3"><a class="reference internal" href="/docs/select-list/">SELECT List</a></li>
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- <li class="toctree-l3"><a class="reference internal" href="/docs/from-clause/">FROM Clause</a></li>
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- <li class="toctree-l3"><a class="reference internal" href="/docs/group-by-clause/">GROUP BY Clause</a></li>
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- <li class="toctree-l3"><a class="reference internal" href="/docs/having-clause/">HAVING Clause</a></li>
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- <li class="toctree-l3"><a class="reference internal" href="/docs/limit-clause/">LIMIT Clause</a></li>
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- <li class="toctree-l3"><a class="reference internal" href="/docs/offset-clause/">OFFSET Clause</a></li>
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- <li class="toctree-l3"><a class="reference internal" href="/docs/order-by-clause/">ORDER BY Clause</a></li>
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- <li class="toctree-l3"><a class="reference internal" href="/docs/union-set-operator/">UNION Set Operator</a></li>
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- <li class="toctree-l3"><a class="reference internal" href="/docs/where-clause/">WHERE Clause</a></li>
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- <li class="toctree-l3"><a class="reference internal" href="/docs/with-clause/">WITH Clause</a></li>
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- <li class="toctree-l3"><a class="reference internal" href="/docs/show-databases-and-show-schemas/">SHOW DATABASES and SHOW SCHEMAS</a></li>
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- <li class="toctree-l3"><a class="reference internal" href="/docs/show-files/">SHOW FILES</a></li>
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- <li class="toctree-l3"><a class="reference internal" href="/docs/show-tables/">SHOW TABLES</a></li>
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- <li class="toctree-l3"><a class="reference internal" href="/docs/use/">USE</a></li>
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- </ul>
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- <li class="toctree-l2"><a href="javascript: void(0);">SQL Conditional Expressions</a></li>
- <ul style="display: none">
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- <li class="toctree-l3"><a class="reference internal" href="/docs/case/">CASE</a></li>
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- </ul>
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- <li class="toctree-l2"><a class="reference internal" href="/docs/reserved-keywords/">Reserved Keywords</a></li>
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- <li class="toctree-l2"><a class="reference internal" href="/docs/sql-extensions/">SQL Extensions</a></li>
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- </ul>
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- <li class="toctree-l1"><a href="javascript: void(0);">Data Sources and File Formats</a></li>
- <ul style="display: none">
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- <li class="toctree-l2"><a class="reference internal" href="/docs/data-sources-and-file-formats-introduction/">Data Sources and File Formats Introduction</a></li>
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- <li class="toctree-l2"><a class="reference internal" href="/docs/hive-to-drill-data-type-mapping/">Hive-to-Drill Data Type Mapping</a></li>
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- <li class="toctree-l2"><a class="reference internal" href="/docs/deploying-and-using-a-hive-udf/">Deploying and Using a Hive UDF</a></li>
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- <li class="toctree-l2"><a class="reference internal" href="/docs/parquet-format/">Parquet Format</a></li>
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- <li class="toctree-l2"><a class="reference internal" href="/docs/json-data-model/">JSON Data Model</a></li>
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- </ul>
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- <li class="toctree-l1"><a href="javascript: void(0);">Develop Custom Functions</a></li>
- <ul style="display: none">
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- <li class="toctree-l2"><a class="reference internal" href="/docs/develop-custom-functions-introduction/">Develop Custom Functions Introduction</a></li>
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- <li class="toctree-l2"><a class="reference internal" href="/docs/develop-a-simple-function/">Develop a Simple Function</a></li>
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- <li class="toctree-l2"><a class="reference internal" href="/docs/developing-an-aggregate-function/">Developing an Aggregate Function</a></li>
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- <li class="toctree-l2"><a class="reference internal" href="/docs/adding-custom-functions-to-drill/">Adding Custom Functions to Drill</a></li>
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- <li class="toctree-l2"><a class="reference internal" href="/docs/using-custom-functions-in-queries/">Using Custom Functions in Queries</a></li>
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- <li class="toctree-l2"><a class="reference internal" href="/docs/custom-function-interfaces/">Custom Function Interfaces</a></li>
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- </ul>
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- <li class="toctree-l1"><a class="reference internal" href="/docs/troubleshooting/">Troubleshooting</a></li>
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- <li class="toctree-l1"><a href="javascript: void(0);">Developer Information</a></li>
- <ul style="display: none">
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- <li class="toctree-l2"><a href="javascript: void(0);">Develop Drill</a></li>
- <ul style="display: none">
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- <li class="toctree-l3"><a class="reference internal" href="/docs/compiling-drill-from-source/">Compiling Drill from Source</a></li>
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- <li class="toctree-l3"><a class="reference internal" href="/docs/drill-patch-review-tool/">Drill Patch Review Tool</a></li>
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- </ul>
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- <li class="toctree-l2"><a href="javascript: void(0);">Contribute to Drill</a></li>
- <ul style="display: none">
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- <li class="toctree-l3"><a class="reference internal" href="/docs/apache-drill-contribution-guidelines/">Apache Drill Contribution Guidelines</a></li>
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- <li class="toctree-l3"><a class="reference internal" href="/docs/apache-drill-contribution-ideas/">Apache Drill Contribution Ideas</a></li>
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- </ul>
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- <li class="toctree-l2"><a href="javascript: void(0);">Design Docs</a></li>
- <ul style="display: none">
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- <li class="toctree-l3"><a class="reference internal" href="/docs/drill-plan-syntax/">Drill Plan Syntax</a></li>
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- <li class="toctree-l3"><a class="reference internal" href="/docs/rpc-overview/">RPC Overview</a></li>
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- <li class="toctree-l3"><a class="reference internal" href="/docs/query-stages/">Query Stages</a></li>
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- <li class="toctree-l3"><a class="reference internal" href="/docs/useful-research/">Useful Research</a></li>
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- <li class="toctree-l3"><a class="reference internal" href="/docs/value-vectors/">Value Vectors</a></li>
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- </ul>
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- </ul>
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- <li class="toctree-l1"><a href="javascript: void(0);">Release Notes</a></li>
- <ul style="display: none">
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- <li class="toctree-l2"><a class="reference internal" href="/docs/apache-drill-0-5-0-release-notes/">Apache Drill 0.5.0 Release Notes</a></li>
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- <li class="toctree-l2"><a class="reference internal" href="/docs/apache-drill-0-4-0-release-notes/">Apache Drill 0.4.0 Release Notes</a></li>
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- <li class="toctree-l2"><a class="reference internal" href="/docs/apache-drill-m1-release-notes-apache-drill-alpha/">Apache Drill M1 Release Notes (Apache Drill Alpha)</a></li>
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- <li class="toctree-l2"><a class="reference internal" href="/docs/apache-drill-m1-release-notes-apache-drill-alpha/">Apache Drill M1 Release Notes (Apache Drill Alpha)</a></li>
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- <li class="toctree-l2"><a class="reference internal" href="/docs/apache-drill-0-6-0-release-notes/">Apache Drill 0.6.0 Release Notes</a></li>
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- <li class="toctree-l2"><a class="reference internal" href="/docs/apache-drill-0-7-0-release-notes/">Apache Drill 0.7.0 Release Notes</a></li>
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- <li class="toctree-l2"><a class="reference internal" href="/docs/apache-drill-0-8-0-release-notes/">Apache Drill 0.8.0 Release Notes</a></li>
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- <li class="toctree-l2"><a class="reference internal" href="/docs/apache-drill-0-9-0-release-notes/">Apache Drill 0.9.0 Release Notes</a></li>
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- <li class="toctree-l2"><a class="reference internal" href="/docs/apache-drill-1-0-0-release-notes/">Apache Drill 1.0.0 Release Notes</a></li>
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- </ul>
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- <li class="toctree-l1"><a href="javascript: void(0);">Sample Datasets</a></li>
- <ul style="display: none">
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- <li class="toctree-l2"><a class="reference internal" href="/docs/aol-search/">AOL Search</a></li>
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- <li class="toctree-l2"><a class="reference internal" href="/docs/enron-emails/">Enron Emails</a></li>
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- <li class="toctree-l2"><a class="reference internal" href="/docs/wikipedia-edit-history/">Wikipedia Edit History</a></li>
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- </ul>
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- <li class="toctree-l1"><a href="javascript: void(0);">Archived Pages</a></li>
- <ul style="display: none">
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- <li class="toctree-l2"><a class="reference internal" href="/docs/how-to-run-the-drill-demo/">How to Run the Drill Demo</a></li>
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- <li class="toctree-l2"><a class="reference internal" href="/docs/what-is-apache-drill/">What is Apache Drill</a></li>
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- <p>The query log provides audit log functionality for the queries executed by various drillbits in the cluster. The log records important information about queries executed on the Drillbit where Drill runs. The log includes query text, start time, end time, user, status, schema, and the query id. You can query one of the following log files, depending on whether you run Drill in embedded or distributed mode, to get audit logging information:</p>
-
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-<li><code>sqlline_queries.json</code> (embedded mode) </li>
-<li><code>drillbit_queries.json</code> (distributed mode)</li>
-</ul>
-
-<h2 id="checking-the-most-recent-queries">Checking the Most Recent Queries</h2>
-
-<p>For example, to check the most recent queries, query the log using this command:</p>
-<div class="highlight"><pre><code class="language-text" data-lang="text">SELECT * FROM dfs.`default`.`/Users/drill-user/apache-drill-1.0.0/log/sqlline_queries.json` t ORDER BY `start` LIMIT 5;
-
-+----------------+------------+---------------------------------------+--------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------+---------+----------------+------------+
-| finish | outcome | queryId | queryText | schema | start | username |
-+----------------+------------+---------------------------------------+--------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------+---------+----------------+------------+
-| 1431752662216 | FAILED | 2aa9302b-bf6f-a378-d66e-151834e87b16 | select * from dfs.`default`.`/Users/nrentachintala/Downloads/testgoogle.json` t limit 1 | | 1431752660376 | anonymous |
-| 1431752769079 | COMPLETED | 2aa92fc1-b722-c27a-10f7-57a1cf0dd366 | SELECT KVGEN(checkin_info) checkins FROM dfs.`/users/nrentachintala/Downloads/yelp/yelp_academic_dataset_checkin.json` LIMIT 2 | | 1431752765303 | anonymous |
-| 1431752786341 | COMPLETED | 2aa92faf-2103-047b-9761-32eedefba1e6 | SELECT FLATTEN(KVGEN(checkin_info)) checkins FROM dfs.`/users/nrentachintala/Downloads/yelp/yelp_academic_dataset_checkin.json` LIMIT 20 | | 1431752784532 | anonymous |
-| 1431752809084 | FAILED | 2aa92f97-61d3-1e9a-97b0-c754f5b568d5 | SELECT SUM(checkintbl.checkins.`value`) AS TotalCheckins FROM (SELECT FLATTEN(KVGEN(checkin_info)) checkins FROM dfs.`/users/nrentachintala/Downloads/yelp/yelp_academic_dataset_checkin.json` ) checkintbl | | 1431752808923 | anonymous |
-| 1431752853992 | COMPLETED | 2aa92f87-0250-c6ac-3700-9ae1f98435b8 | SELECT SUM(checkintbl.checkins.`value`) AS TotalCheckins FROM (SELECT FLATTEN(KVGEN(checkin_info)) checkins FROM dfs.`/users/nrentachintala/Downloads/yelp/yelp_academic_dataset_checkin.json` ) checkintbl | | 1431752824947 | anonymous |
-+----------------+------------+---------------------------------------+--------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------+---------+----------------+------------+
-5 rows selected (0.532 seconds)
-</code></pre></div>
-<div class="admonition note">
- <p class="first admonition-title">Note</p>
- <p class="last">This document aligns Drill output for example purposes. Drill output is not aligned in this case. </p>
-</div>
-
-<h2 id="checking-drillbit-traffic">Checking Drillbit Traffic</h2>
-
-<p>To check the total number of queries executed since the session started on the Drillbit, use the following command:</p>
-<div class="highlight"><pre><code class="language-text" data-lang="text">SELECT COUNT(*) FROM dfs.`default`.`/Users/drill-user/apache-drill-1.0.0/log/sqlline_queries.json`;
-
-+---------+
-| EXPR$0 |
-+---------+
-| 32 |
-+---------+
-1 row selected (0.144 seconds)
-</code></pre></div>
-<h2 id="getting-query-success-statistics">Getting Query Success Statistics</h2>
-
-<p>To get the total number of successful and failed executions, run the following command:</p>
-<div class="highlight"><pre><code class="language-text" data-lang="text">SELECT outcome, COUNT(*) FROM dfs.`default`.`/Users/drill-user/apache-drill-1.0.0/log/sqlline_queries.json` GROUP BY outcome;
-
-+------------+---------+
-| outcome | EXPR$1 |
-+------------+---------+
-| COMPLETED | 18 |
-| FAILED | 14 |
-+------------+---------+
-2 rows selected (0.219 seconds)
-</code></pre></div>
-<p>Note the queryid column in the audit can be correlated with the profiles of the queries for troubleshooting/diagnostics purposes.</p>
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- <a class="edit-link" href="https://github.com/apache/drill/blob/gh-pages/_docs/sql-reference/sql-commands/120-use-command.md" target="_blank"><i class="fa fa-pencil-square-o"></i></a>
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- <h1>USE Command</h1>
-
- </div>
-
- <link href="/css/docpage.css" rel="stylesheet" type="text/css">
-
- <div class="int_text" align="left">
-
- <p>The USE command changes the schema context to the specified schema. When you
-issue the USE command to switch to a particular schema, Drill queries that
-schema only.</p>
-
-<h2 id="syntax">Syntax</h2>
-
-<p>The USE command supports the following syntax:</p>
-<div class="highlight"><pre><code class="language-text" data-lang="text">USE schema_name;
-</code></pre></div>
-<h2 id="parameters">Parameters</h2>
-
-<p><em>schema_name</em><br>
-A unique name for a Drill schema. A schema in Drill is a configured storage
-plugin, such as hive, or a storage plugin and workspace. For example,
-<code>dfs.donuts</code> where <code>dfs</code> is an instance of the file system configured as a
-storage plugin, and <code>donuts</code> is a workspace configured to point to a directory
-within the file system. You can configure and use multiple storage plugins and
-workspaces in Drill. See <a href="/docs/storage-plugin-registration">Storage Plugin Registration</a> and
-<a href="/docs/Workspaces">Workspaces</a>.</p>
-
-<h2 id="usage-notes">Usage Notes</h2>
-
-<p>Issue the USE command to change to a particular schema. When you use a schema,
-you do not have to include the full path to a file or table in your query. </p>
-
-<p>For example, to query a file named <code>donuts.json</code> in the
-<code>/users/max/drill/json/</code> directory, you must include the full file path in
-your query if you do not use a defined workspace</p>
-<div class="highlight"><pre><code class="language-text" data-lang="text">SELECT * FROM dfs.`/users/max/drill/json/donuts.json` WHERE type='frosted';
-</code></pre></div>
-<p>If you create a schema that points to the <code>~/json</code> directory where the file is
-located and then use the schema, you can issue the query without explicitly
-stating the file path:</p>
-<div class="highlight"><pre><code class="language-text" data-lang="text">USE dfs.json;
-SELECT * FROM `donuts.json`WHERE type='frosted';
-</code></pre></div>
-<p>If you do not use a schema before querying a table, you must use absolute
-notation, such as <code>[schema.]table[.column]</code>, to query the table. If you switch
-to the schema where the table exists, you can just specify the table name in
-the query. For example, to query a table named "<code>products</code>" in the <code>hive</code>
-schema, tell Drill to use the hive schema and then issue your query with the
-table name only:</p>
-<div class="highlight"><pre><code class="language-text" data-lang="text">USE hive;
-SELECT * FROM products limit 5;
-</code></pre></div>
-<p>Before you issue the USE command, you may want to run SHOW DATABASES or SHOW
-SCHEMAS to see a list of the configured storage plugins and workspaces.</p>
-
-<h2 id="example">Example</h2>
-
-<p>This example demonstrates how to use a file system and a hive schema to query
-a file and table in Drill. </p>
-
-<p>Issue the SHOW DATABASES or SHOW SCHEMAS command to see a list of the
-available schemas that you can use. Both commands return the same results.</p>
-<div class="highlight"><pre><code class="language-text" data-lang="text">0: jdbc:drill:zk=drilldemo:5181> show schemas;
-+-------------+
-| SCHEMA_NAME |
-+-------------+
-| hive.default |
-| dfs.reviews |
-| dfs.flatten |
-| dfs.default |
-| dfs.root |
-| dfs.logs |
-| dfs.myviews |
-| dfs.clicks |
-| dfs.tmp |
-| sys |
-| hbase |
-| INFORMATION_SCHEMA |
-| s3.twitter |
-| s3.reviews |
-| s3.default |
-+-------------+
-15 rows selected (0.059 seconds)
-</code></pre></div>
-<p>Issue the USE command with the schema that you want Drill to query.<br>
-<strong>Note:</strong> If you use any of the Drill default schemas, such as <code>cp.default</code> or <code>dfs.default</code>, do not include .<code>default</code>. For example, if you want Drill to issue queries on files in its classpath, you can issue the following command:</p>
-<div class="highlight"><pre><code class="language-text" data-lang="text">0: jdbc:drill:zk=local> use cp;
-+------------+------------+
-| ok | summary |
-+------------+------------+
-| true | Default schema changed to 'cp' |
-+------------+------------+
-1 row selected (0.04 seconds)
-</code></pre></div>
-<p>Issue the USE command with a file system schema.</p>
-<div class="highlight"><pre><code class="language-text" data-lang="text">0: jdbc:drill:zk=drilldemo:5181> use dfs.logs;
-+------------+------------+
-| ok | summary |
-+------------+------------+
-| true | Default schema changed to 'dfs.logs' |
-+------------+------------+
-1 row selected (0.054 seconds)
-</code></pre></div>
-<p>You can issue the SHOW FILES command to view the files and directories within
-the schema.</p>
-<div class="highlight"><pre><code class="language-text" data-lang="text">0: jdbc:drill:zk=drilldemo:5181> show files;
-+------------+-------------+------------+------------+------------+------------+-------------+------------+------------------+
-| name | isDirectory | isFile | length | owner | group | permissions | accessTime | modificationTime |
-+------------+-------------+------------+------------+------------+------------+-------------+------------+------------------+
-| csv | true | false | 1 | mapr | mapr | rwxrwxr-x | 2015-02-09 06:49:17.0 | 2015-02-09 06:50:11.172 |
-| logs | true | false | 3 | mapr | mapr | rwxrwxr-x | 2014-12-16 18:58:26.0 | 2014-12-16 18:58:27.223 |
-+------------+-------------+------------+------------+------------+------------+-------------+------------+------------------+
-2 rows selected (0.156 seconds)
-</code></pre></div>
-<p>Query a file or directory in the file system schema.</p>
-<div class="highlight"><pre><code class="language-text" data-lang="text">0: jdbc:drill:zk=drilldemo:5181> select * from logs limit 5;
-+------------+------------+------------+------------+------------+------------+------------+------------+------------+------------+------------+------------+
-| dir0 | dir1 | trans_id | date | time | cust_id | device | state | camp_id | keywords | prod_id | purch_flag |
-+------------+------------+------------+------------+------------+------------+------------+------------+------------+------------+------------+------------+
-| 2014 | 8 | 24181 | 08/02/2014 | 09:23:52 | 0 | IOS5 | il | 2 | wait | 128 | false |
-| 2014 | 8 | 24195 | 08/02/2014 | 07:58:19 | 243 | IOS5 | mo | 6 | hmm | 107 | false |
-| 2014 | 8 | 24204 | 08/01/2014 | 12:10:27 | 12048 | IOS6 | il | 1 | marge | 324 | false |
-| 2014 | 8 | 24222 | 08/02/2014 | 16:28:37 | 2488 | IOS6 | pa | 2 | to | 391 | false |
-| 2014 | 8 | 24227 | 08/02/2014 | 07:14:00 | 154687 | IOS5 | wa | 2 | on | 376 | false |
-+------------+------------+------------+------------+------------+------------+------------+------------+------------+------------+------------+------------+
-</code></pre></div>
-<p>Issue the USE command to switch to the hive schema.</p>
-<div class="highlight"><pre><code class="language-text" data-lang="text">0: jdbc:drill:zk=drilldemo:5181> use hive;
-+------------+------------+
-| ok | summary |
-+------------+------------+
-| true | Default schema changed to 'hive' |
-+------------+------------+
-1 row selected (0.093 seconds)
-</code></pre></div>
-<p>Issue the SHOW TABLES command to see the tables that exist within the schema.</p>
-<div class="highlight"><pre><code class="language-text" data-lang="text">0: jdbc:drill:zk=drilldemo:5181> show tables;
-+--------------+------------+
-| TABLE_SCHEMA | TABLE_NAME |
-+--------------+------------+
-| hive.default | orders |
-| hive.default | products |
-+--------------+------------+
-2 rows selected (0.421 seconds)
-</code></pre></div>
-<p>Query a table within the schema.</p>
-<div class="highlight"><pre><code class="language-text" data-lang="text">0: jdbc:drill:zk=drilldemo:5181> select * from products limit 5;
-+------------+------------+------------+------------+
-| prod_id | name | category | price |
-+------------+------------+------------+------------+
-| 0 | Sony notebook | laptop | 959 |
-| 1 | #10-4 1/8 x 9 1/2 Premium Diagonal Seam Envelopes | Envelopes | 16 |
-| 2 | #10- 4 1/8 x 9 1/2 Recycled Envelopes | Envelopes | 9 |
-| 3 | #10- 4 1/8 x 9 1/2 Security-Tint Envelopes | Envelopes | 8 |
-| 4 | #10 Self-Seal White Envelopes | Envelopes | 11 |
-+------------+------------+------------+------------+
-5 rows selected (0.211 seconds)
-</code></pre></div>
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-<h2 id="syntax">Syntax</h2>
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-<p>The SHOW DATABASES and SHOW SCHEMAS commands support the following syntax:</p>
-<div class="highlight"><pre><code class="language-text" data-lang="text">SHOW DATABASES;
-SHOW SCHEMAS;
-</code></pre></div>
-<div class="admonition note">
- <p class="first admonition-title">Note</p>
- <p class="last">These commands generate the same results. </p>
-</div>
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-<h2 id="usage-notes">Usage Notes</h2>
-
-<p>You may want to run the SHOW DATABASES or SHOW SCHEMAS command to see a list of the configured storage plugins and workspaces in Drill before you issue the USE command to switch to a particular schema for your queries.</p>
-
-<p>In Drill, a database or schema is a configured storage plugin instance or a configured storage plugin instance with a configured workspace. For example, dfs.donuts where dfs is the file system configured as a storage plugin instance, and donuts is a configured workspace.</p>
-
-<p>You can configure and use multiple storage plugins and workspaces in Drill. See <a href="/docs/storage-plugin-registration">Storage Plugin Registration</a> and <a href="/docs/workspaces">Workspaces</a>.</p>
-
-<h2 id="example">Example</h2>
-
-<p>The following example uses the SHOW DATABASES and SHOW SCHEMAS commands to generate a list of the available schemas in Drill. Some of the results that display are specific to all Drill installations, such as <code>cp.default</code> and <code>dfs.default</code>, while others vary based on your specific storage plugin and workspace configurations.</p>
-<div class="highlight"><pre><code class="language-text" data-lang="text">0: jdbc:drill:zk=local> show databases;
-+-------------+
-| SCHEMA_NAME |
-+-------------+
-| dfs.default |
-| dfs.root |
-| dfs.donuts |
-| dfs.tmp |
-| dfs.customers |
-| dfs.yelp |
-| cp.default |
-| sys |
-| INFORMATION_SCHEMA |
-+-------------+
-9 rows selected (0.07 seconds)
-
-
-0: jdbc:drill:zk=local> show schemas;
-+-------------+
-| SCHEMA_NAME |
-+-------------+
-| dfs.default |
-| dfs.root |
-| dfs.donuts |
-| dfs.tmp |
-| dfs.customers |
-| dfs.yelp |
-| cp.default |
-| sys |
-| INFORMATION_SCHEMA |
-+-------------+
-9 rows selected (0.058 seconds)
-</code></pre></div>
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- <li class="toctree-l2"><a class="reference internal" href="/docs/why-drill/">Why Drill</a></li>
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- </ul>
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- <li class="toctree-l1"><a href="javascript: void(0);">Architecture</a></li>
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- <li class="toctree-l2"><a class="reference internal" href="/docs/architecture-introduction/">Architecture Introduction</a></li>
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- <li class="toctree-l2"><a class="reference internal" href="/docs/core-modules/">Core Modules</a></li>
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- <li class="toctree-l2"><a href="javascript: void(0);">Architectural Highlights</a></li>
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- <li class="toctree-l3"><a class="reference internal" href="/docs/flexibility/">Flexibility</a></li>
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- <li class="toctree-l3"><a class="reference internal" href="/docs/performance/">Performance</a></li>
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- </ul>
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- </ul>
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- <li class="toctree-l1"><a href="javascript: void(0);">Tutorials</a></li>
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- <li class="toctree-l2"><a class="reference internal" href="/docs/tutorials-introduction/">Tutorials Introduction</a></li>
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- <li class="toctree-l2"><a class="reference internal" href="/docs/drill-in-10-minutes/">Drill in 10 Minutes</a></li>
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- <li class="toctree-l2"><a class="reference internal" href="/docs/analyzing-the-yelp-academic-dataset/">Analyzing the Yelp Academic Dataset</a></li>
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- <li class="toctree-l2"><a href="javascript: void(0);">Learn Drill with the MapR Sandbox</a></li>
- <ul style="display: none">
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- <li class="toctree-l3"><a class="reference internal" href="/docs/about-the-mapr-sandbox/">About the MapR Sandbox</a></li>
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- <li class="toctree-l3"><a class="reference internal" href="/docs/installing-the-apache-drill-sandbox/">Installing the Apache Drill Sandbox</a></li>
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- <li class="toctree-l3"><a class="reference internal" href="/docs/getting-to-know-the-drill-sandbox/">Getting to Know the Drill Sandbox</a></li>
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- <li class="toctree-l3"><a class="reference internal" href="/docs/lesson-1-learn-about-the-data-set/">Lesson 1: Learn about the Data Set</a></li>
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- <li class="toctree-l3"><a class="reference internal" href="/docs/lesson-2-run-queries-with-ansi-sql/">Lesson 2: Run Queries with ANSI SQL</a></li>
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- <li class="toctree-l3"><a class="reference internal" href="/docs/lesson-3-run-queries-on-complex-data-types/">Lesson 3: Run Queries on Complex Data Types</a></li>
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- <li class="toctree-l3"><a class="reference internal" href="/docs/summary/">Summary</a></li>
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- </ul>
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- <li class="toctree-l2"><a class="reference internal" href="/docs/analyzing-highly-dynamic-datasets/">Analyzing Highly Dynamic Datasets</a></li>
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- </ul>
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- <li class="toctree-l1"><a href="javascript: void(0);">Install Drill</a></li>
- <ul style="display: none">
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- <li class="toctree-l2"><a class="reference internal" href="/docs/install-drill-introduction/">Install Drill Introduction</a></li>
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- <li class="toctree-l2"><a href="javascript: void(0);">Installing Drill in Embedded Mode</a></li>
- <ul style="display: none">
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- <li class="toctree-l3"><a class="reference internal" href="/docs/embedded-mode-prerequisites/">Embedded Mode Prerequisites</a></li>
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- <li class="toctree-l3"><a class="reference internal" href="/docs/installing-drill-on-linux-and-mac-os-x/">Installing Drill on Linux and Mac OS X</a></li>
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- <li class="toctree-l3"><a class="reference internal" href="/docs/starting-drill-on-linux-and-mac-os-x/">Starting Drill on Linux and Mac OS X</a></li>
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- <li class="toctree-l3"><a class="reference internal" href="/docs/installing-drill-on-windows/">Installing Drill on Windows</a></li>
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- <li class="toctree-l3"><a class="reference internal" href="/docs/starting-drill-on-windows/">Starting Drill on Windows</a></li>
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- </ul>
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- <li class="toctree-l2"><a href="javascript: void(0);">Installing Drill in Distributed Mode</a></li>
- <ul style="display: none">
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- <li class="toctree-l3"><a class="reference internal" href="/docs/distributed-mode-prerequisites/">Distributed Mode Prerequisites</a></li>
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- <li class="toctree-l3"><a class="reference internal" href="/docs/installing-drill-on-the-cluster/">Installing Drill on the Cluster</a></li>
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- <li class="toctree-l3"><a class="reference internal" href="/docs/starting-drill-in-distributed-mode/">Starting Drill in Distributed Mode</a></li>
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- </ul>
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- </ul>
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- <li class="toctree-l1"><a href="javascript: void(0);">Configure Drill</a></li>
- <ul style="display: none">
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- <li class="toctree-l2"><a class="reference internal" href="/docs/configure-drill-introduction/">Configure Drill Introduction</a></li>
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- <li class="toctree-l2"><a class="reference internal" href="/docs/configuring-drill-memory/">Configuring Drill Memory</a></li>
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- <li class="toctree-l2"><a href="javascript: void(0);">Configuring a Multitenant Cluster</a></li>
- <ul style="display: none">
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- <li class="toctree-l3"><a class="reference internal" href="/docs/configuring-a-multitenant-cluster-introduction/">Configuring a Multitenant Cluster Introduction</a></li>
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- <li class="toctree-l3"><a class="reference internal" href="/docs/configuring-multitenant-resources/">Configuring Multitenant Resources</a></li>
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- <li class="toctree-l3"><a class="reference internal" href="/docs/configuring-resources-for-a-shared-drillbit/">Configuring Resources for a Shared Drillbit</a></li>
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- </ul>
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- <li class="toctree-l2"><a class="reference internal" href="/docs/configuring-user-impersonation/">Configuring User Impersonation</a></li>
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- <li class="toctree-l2"><a class="reference internal" href="/docs/configuring-user-authentication/">Configuring User Authentication</a></li>
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- <li class="toctree-l2"><a href="javascript: void(0);">Configuration Options</a></li>
- <ul style="display: none">
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- <li class="toctree-l3"><a class="reference internal" href="/docs/configuration-options-introduction/">Configuration Options Introduction</a></li>
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- <li class="toctree-l3"><a class="reference internal" href="/docs/start-up-options/">Start-Up Options</a></li>
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- <li class="toctree-l3"><a class="reference internal" href="/docs/planning-and-execution-options/">Planning and Execution Options</a></li>
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- <li class="toctree-l3"><a class="reference internal" href="/docs/persistent-configuration-storage/">Persistent Configuration Storage</a></li>
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- </ul>
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- <li class="toctree-l2"><a class="reference internal" href="/docs/ports-used-by-drill/">Ports Used by Drill</a></li>
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- <li class="toctree-l2"><a class="reference internal" href="/docs/partition-pruning/">Partition Pruning</a></li>
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- </ul>
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- <li class="toctree-l1"><a href="javascript: void(0);">Connect a Data Source</a></li>
- <ul style="display: none">
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- <li class="toctree-l2"><a class="reference internal" href="/docs/connect-a-data-source-introduction/">Connect a Data Source Introduction</a></li>
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- <li class="toctree-l2"><a class="reference internal" href="/docs/storage-plugin-registration/">Storage Plugin Registration</a></li>
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- <li class="toctree-l2"><a href="javascript: void(0);">Storage Plugin Configuration</a></li>
- <ul style="display: none">
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- <li class="toctree-l3"><a class="reference internal" href="/docs/plugin-configuration-introduction/">Plugin Configuration Introduction</a></li>
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- <li class="toctree-l3"><a class="reference internal" href="/docs/workspaces/">Workspaces</a></li>
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- <li class="toctree-l3"><a class="reference internal" href="/docs/file-system-storage-plugin/">File System Storage Plugin</a></li>
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- <li class="toctree-l3"><a class="reference internal" href="/docs/hbase-storage-plugin/">HBase Storage Plugin</a></li>
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- <li class="toctree-l3"><a class="reference internal" href="/docs/hive-storage-plugin/">Hive Storage Plugin</a></li>
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- <li class="toctree-l3"><a class="reference internal" href="/docs/drill-default-input-format/">Drill Default Input Format</a></li>
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- </ul>
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- <li class="toctree-l2"><a class="reference internal" href="/docs/mongodb-plugin-for-apache-drill/">MongoDB Plugin for Apache Drill</a></li>
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- <li class="toctree-l2"><a class="reference internal" href="/docs/mapr-db-format/">MapR-DB Format</a></li>
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- </ul>
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- <li class="toctree-l1"><a href="javascript: void(0);">ODBC/JDBC Interfaces</a></li>
- <ul style="display: none">
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- <li class="toctree-l2"><a class="reference internal" href="/docs/interfaces-introduction/">Interfaces Introduction</a></li>
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- <li class="toctree-l2"><a class="reference internal" href="/docs/using-jdbc/">Using JDBC</a></li>
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- <li class="toctree-l2"><a href="javascript: void(0);">Using ODBC on Linux and Mac OS X</a></li>
- <ul style="display: none">
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- <li class="toctree-l3"><a class="reference internal" href="/docs/odbc-on-linux-and-mac-introduction/">ODBC on Linux and Mac Introduction</a></li>
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- <li class="toctree-l3"><a class="reference internal" href="/docs/installing-the-driver-on-linux/">Installing the Driver on Linux</a></li>
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- <li class="toctree-l3"><a class="reference internal" href="/docs/installing-the-driver-on-mac-os-x/">Installing the Driver on Mac OS X</a></li>
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- <li class="toctree-l3"><a class="reference internal" href="/docs/configuring-connections-on-linux-and-mac-os-x/">Configuring Connections on Linux and Mac OS X</a></li>
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- <li class="toctree-l3"><a class="reference internal" href="/docs/driver-configuration-options/">Driver Configuration Options</a></li>
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- <li class="toctree-l3"><a class="reference internal" href="/docs/using-a-connection-string/">Using a Connection String</a></li>
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- <li class="toctree-l3"><a class="reference internal" href="/docs/advanced-properties/">Advanced Properties</a></li>
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- <li class="toctree-l3"><a class="reference internal" href="/docs/testing-the-odbc-connection/">Testing the ODBC Connection</a></li>
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- </ul>
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- <li class="toctree-l2"><a href="javascript: void(0);">Using ODBC on Windows</a></li>
- <ul style="display: none">
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- <li class="toctree-l3"><a class="reference internal" href="/docs/installing-the-driver-on-windows/">Installing the Driver on Windows</a></li>
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- <li class="toctree-l3"><a class="reference internal" href="/docs/configuring-connections-on-windows/">Configuring Connections on Windows</a></li>
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- <li class="toctree-l3"><a class="reference internal" href="/docs/connecting-to-odbc-data-sources/">Connecting to ODBC Data Sources</a></li>
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- <li class="toctree-l3"><a class="reference internal" href="/docs/tableau-examples/">Tableau Examples</a></li>
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- <li class="toctree-l3"><a class="reference internal" href="/docs/using-drill-explorer-on-windows/">Using Drill Explorer on Windows</a></li>
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- </ul>
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-
- <li class="toctree-l2"><a class="reference internal" href="/docs/using-microstrategy-analytics-with-apache-drill/">Using MicroStrategy Analytics with Apache Drill</a></li>
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- <li class="toctree-l2"><a class="reference internal" href="/docs/using-tibco-spotfire-with-drill/">Using Tibco Spotfire with Drill</a></li>
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- <li class="toctree-l2"><a class="reference internal" href="/docs/using-apache-drill-with-tableau-9-desktop/">Using Apache Drill with Tableau 9 Desktop</a></li>
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- <li class="toctree-l2"><a class="reference internal" href="/docs/using-apache-drill-with-tableau-9-server/">Using Apache Drill with Tableau 9 Server</a></li>
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- </ul>
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- <li class="toctree-l1"><a href="javascript: void(0);">Query Data</a></li>
- <ul style="display: none">
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- <li class="toctree-l2"><a class="reference internal" href="/docs/query-data-introduction/">Query Data Introduction</a></li>
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- <li class="toctree-l2"><a href="javascript: void(0);">Querying a File System</a></li>
- <ul style="display: none">
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- <li class="toctree-l3"><a class="reference internal" href="/docs/querying-a-file-system-introduction/">Querying a File System Introduction</a></li>
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- <li class="toctree-l3"><a class="reference internal" href="/docs/querying-json-files/">Querying JSON Files</a></li>
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- <li class="toctree-l3"><a class="reference internal" href="/docs/querying-parquet-files/">Querying Parquet Files</a></li>
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- <li class="toctree-l3"><a class="reference internal" href="/docs/querying-plain-text-files/">Querying Plain Text Files</a></li>
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- <li class="toctree-l3"><a class="reference internal" href="/docs/querying-directories/">Querying Directories</a></li>
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- </ul>
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- <li class="toctree-l2"><a class="reference internal" href="/docs/querying-hbase/">Querying HBase</a></li>
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- <li class="toctree-l2"><a href="javascript: void(0);">Querying Complex Data</a></li>
- <ul style="display: none">
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- <li class="toctree-l3"><a class="reference internal" href="/docs/querying-complex-data-introduction/">Querying Complex Data Introduction</a></li>
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- <li class="toctree-l3"><a class="reference internal" href="/docs/sample-data-donuts/">Sample Data: Donuts</a></li>
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- <li class="toctree-l3"><a class="reference internal" href="/docs/selecting-flat-data/">Selecting Flat Data</a></li>
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- <li class="toctree-l3"><a class="reference internal" href="/docs/using-sql-functions-clauses-and-joins/">Using SQL Functions, Clauses, and Joins</a></li>
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- <li class="toctree-l3"><a class="reference internal" href="/docs/selecting-nested-data-for-a-column/">Selecting Nested Data for a Column</a></li>
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- <li class="toctree-l3"><a class="reference internal" href="/docs/selecting-multiple-columns-within-nested-data/">Selecting Multiple Columns Within Nested Data</a></li>
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- </ul>
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- <li class="toctree-l2"><a class="reference internal" href="/docs/querying-hive/">Querying Hive</a></li>
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- <li class="toctree-l2"><a class="reference internal" href="/docs/querying-the-information-schema/">Querying the INFORMATION SCHEMA</a></li>
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- <li class="toctree-l2"><a class="reference internal" href="/docs/querying-system-tables/">Querying System Tables</a></li>
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- <li class="toctree-l2"><a class="reference internal" href="/docs/monitoring-and-canceling-queries-in-the-drill-web-ui/">Monitoring and Canceling Queries in the Drill Web UI</a></li>
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- </ul>
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- <li class="toctree-l1 current_section "><a href="javascript: void(0);">SQL Reference</a></li>
- <ul class="current_section">
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- <li class="toctree-l2"><a class="reference internal" href="/docs/sql-reference-introduction/">SQL Reference Introduction</a></li>
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- <li class="toctree-l2"><a href="javascript: void(0);">Data Types</a></li>
- <ul style="display: none">
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- <li class="toctree-l3"><a class="reference internal" href="/docs/supported-data-types/">Supported Data Types</a></li>
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- <li class="toctree-l3"><a class="reference internal" href="/docs/date-time-and-timestamp/">Date, Time, and Timestamp</a></li>
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- <li class="toctree-l3"><a class="reference internal" href="/docs/handling-different-data-types/">Handling Different Data Types</a></li>
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- </ul>
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- <li class="toctree-l2"><a class="reference internal" href="/docs/lexical-structure/">Lexical Structure</a></li>
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- <li class="toctree-l2"><a class="reference internal" href="/docs/operators/">Operators</a></li>
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- <li class="toctree-l2"><a href="javascript: void(0);">SQL Functions</a></li>
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- <li class="toctree-l3"><a class="reference internal" href="/docs/about-sql-function-examples/">About SQL Function Examples</a></li>
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- <li class="toctree-l3"><a class="reference internal" href="/docs/math-and-trig/">Math and Trig</a></li>
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- <li class="toctree-l3"><a class="reference internal" href="/docs/data-type-conversion/">Data Type Conversion</a></li>
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- <li class="toctree-l3"><a class="reference internal" href="/docs/date-time-functions-and-arithmetic/">Date/Time Functions and Arithmetic</a></li>
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- <li class="toctree-l3"><a class="reference internal" href="/docs/string-manipulation/">String Manipulation</a></li>
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- <li class="toctree-l3"><a class="reference internal" href="/docs/aggregate-and-aggregate-statistical/">Aggregate and Aggregate Statistical</a></li>
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- <li class="toctree-l3"><a class="reference internal" href="/docs/functions-for-handling-nulls/">Functions for Handling Nulls</a></li>
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- </ul>
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- <li class="toctree-l2"><a href="javascript: void(0);">Nested Data Functions</a></li>
- <ul style="display: none">
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- <li class="toctree-l3"><a class="reference internal" href="/docs/nested-data-limitations/">Nested Data Limitations</a></li>
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- <li class="toctree-l3"><a class="reference internal" href="/docs/flatten/">FLATTEN</a></li>
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- <li class="toctree-l3"><a class="reference internal" href="/docs/kvgen/">KVGEN</a></li>
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- <li class="toctree-l3"><a class="reference internal" href="/docs/repeated-count/">REPEATED_COUNT</a></li>
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- <li class="toctree-l3"><a class="reference internal" href="/docs/repeated-contains/">REPEATED_CONTAINS</a></li>
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- </ul>
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- <li class="toctree-l2"><a class="reference internal" href="/docs/query-directory-functions/">Query Directory Functions</a></li>
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- <li class="toctree-l2"><a href="javascript: void(0);">SQL Commands</a></li>
- <ul style="">
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- <li class="toctree-l3"><a class="reference internal" href="/docs/supported-sql-commands/">Supported SQL Commands</a></li>
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- <li class="toctree-l3"><a class="reference internal" href="/docs/alter-session-command/">ALTER SESSION Command</a></li>
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- <li class="toctree-l3"><a class="reference internal" href="/docs/alter-system-command/">ALTER SYSTEM Command</a></li>
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- <li class="toctree-l3"><a class="reference internal" href="/docs/create-table-as-ctas-command/">CREATE TABLE AS (CTAS) Command</a></li>
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- <li class="toctree-l3"><a class="reference internal" href="/docs/create-view-command/">CREATE VIEW Command</a></li>
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- <li class="toctree-l3"><a class="reference internal" href="/docs/describe-command/">DESCRIBE Command</a></li>
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- <li class="toctree-l3"><a class="reference internal" href="/docs/explain-commands/">EXPLAIN Commands</a></li>
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- <li class="toctree-l3"><a class="reference internal" href="/docs/select-statements/">SELECT Statements</a></li>
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- <li class="toctree-l3"><a class="reference internal" href="/docs/show-databases-and-show-schemas-command/">SHOW DATABASES and SHOW SCHEMAS Command</a></li>
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- <li class="toctree-l3 current"><a class="reference internal" href="/docs/show-files-command/">SHOW FILES Command</a></li>
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- <li class="toctree-l3"><a class="reference internal" href="/docs/show-tables-command/">SHOW TABLES Command</a></li>
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- <li class="toctree-l3"><a class="reference internal" href="/docs/use-command/">USE Command</a></li>
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- <li class="toctree-l2"><a href="javascript: void(0);">SQL Conditional Expressions</a></li>
- <ul style="display: none">
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- <li class="toctree-l3"><a class="reference internal" href="/docs/case/">CASE</a></li>
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- <li class="toctree-l2"><a class="reference internal" href="/docs/reserved-keywords/">Reserved Keywords</a></li>
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- <li class="toctree-l2"><a class="reference internal" href="/docs/sql-extensions/">SQL Extensions</a></li>
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- </ul>
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- <li class="toctree-l1"><a href="javascript: void(0);">Data Sources and File Formats</a></li>
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- <li class="toctree-l2"><a class="reference internal" href="/docs/data-sources-and-file-formats-introduction/">Data Sources and File Formats Introduction</a></li>
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- <li class="toctree-l2"><a class="reference internal" href="/docs/hive-to-drill-data-type-mapping/">Hive-to-Drill Data Type Mapping</a></li>
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- <li class="toctree-l2"><a class="reference internal" href="/docs/deploying-and-using-a-hive-udf/">Deploying and Using a Hive UDF</a></li>
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- <li class="toctree-l2"><a class="reference internal" href="/docs/parquet-format/">Parquet Format</a></li>
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- <li class="toctree-l2"><a class="reference internal" href="/docs/json-data-model/">JSON Data Model</a></li>
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- </ul>
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- <li class="toctree-l1"><a href="javascript: void(0);">Develop Custom Functions</a></li>
- <ul style="display: none">
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- <li class="toctree-l2"><a class="reference internal" href="/docs/develop-custom-functions-introduction/">Develop Custom Functions Introduction</a></li>
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- <li class="toctree-l2"><a class="reference internal" href="/docs/develop-a-simple-function/">Develop a Simple Function</a></li>
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- <li class="toctree-l2"><a class="reference internal" href="/docs/developing-an-aggregate-function/">Developing an Aggregate Function</a></li>
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- <li class="toctree-l2"><a class="reference internal" href="/docs/adding-custom-functions-to-drill/">Adding Custom Functions to Drill</a></li>
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- <li class="toctree-l2"><a class="reference internal" href="/docs/using-custom-functions-in-queries/">Using Custom Functions in Queries</a></li>
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- <li class="toctree-l2"><a class="reference internal" href="/docs/custom-function-interfaces/">Custom Function Interfaces</a></li>
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- </ul>
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- <li class="toctree-l1"><a href="javascript: void(0);">Developer Information</a></li>
- <ul style="display: none">
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- <li class="toctree-l2"><a href="javascript: void(0);">Develop Drill</a></li>
- <ul style="display: none">
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- <li class="toctree-l3"><a class="reference internal" href="/docs/compiling-drill-from-source/">Compiling Drill from Source</a></li>
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- <li class="toctree-l3"><a class="reference internal" href="/docs/drill-patch-review-tool/">Drill Patch Review Tool</a></li>
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- </ul>
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- <li class="toctree-l2"><a href="javascript: void(0);">Contribute to Drill</a></li>
- <ul style="display: none">
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-<h2 id="syntax">Syntax</h2>
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-<p>The SHOW FILES command supports the following syntax.</p>
-<div class="highlight"><pre><code class="language-text" data-lang="text">SHOW FILES [ FROM filesystem.directory_name | IN filesystem.directory_name ];
-</code></pre></div>
-<p>The FROM or IN clause is required if you do not specify a default file system
-first. You can do this with the USE command. FROM and IN are synonyms.</p>
-
-<p>The directory name is optional. (If the directory name is a Drill reserved
-word, you must use back ticks around the name.)</p>
-
-<p>The command returns standard Linux <code>stat</code> information for each file or
-directory, such as permissions, owner, and group values. This information is
-not specific to Drill.</p>
-
-<h2 id="examples">Examples</h2>
-
-<p>The following example returns information about directories and files in the
-local (<code>dfs</code>) file system.</p>
-<div class="highlight"><pre><code class="language-text" data-lang="text">0: jdbc:drill:> use dfs;
-
-+------------+------------+
-| ok | summary |
-+------------+------------+
-| true | Default schema changed to 'dfs' |
-+------------+------------+
-1 row selected (0.318 seconds)
-
-0: jdbc:drill:> show files;
-+------------+-------------+------------+------------+------------+------------+-------------+------------+------------------+
-| name | isDirectory | isFile | length | owner | group | permissions | accessTime | modificationTime |
-+------------+-------------+------------+------------+------------+------------+-------------+------------+------------------+
-| user | true | false | 1 | mapr | mapr | rwxr-xr-x | 2014-07-30 21:37:06.0 | 2014-07-31 22:15:53.193 |
-| backup.tgz | false | true | 36272 | root | root | rw-r--r-- | 2014-07-31 22:09:13.0 | 2014-07-31 22:09:13.211 |
-| JSON | true | false | 1 | root | root | rwxr-xr-x | 2014-07-31 15:22:42.0 | 2014-08-04 15:43:07.083 |
-| scripts | true | false | 3 | root | root | rwxr-xr-x | 2014-07-31 22:10:51.0 | 2014-08-04 18:23:09.236 |
-| temp | true | false | 2 | root | root | rwxr-xr-x | 2014-08-01 20:07:37.0 | 2014-08-01 20:09:42.595 |
-| hbase | true | false | 10 | mapr | mapr | rwxr-xr-x | 2014-07-30 21:36:08.0 | 2014-08-04 18:31:13.778 |
-| tables | true | false | 0 | root | root | rwxrwxrwx | 2014-07-31 22:14:35.0 | 2014-08-04 15:42:43.415 |
-| CSV | true | false | 4 | root | root | rwxrwxrwx | 2014-07-31 17:34:53.0 | 2014-08-04
-...
-</code></pre></div>
-<p>The following example shows the files in a specific directory in the <code>dfs</code>
-file system:</p>
-<div class="highlight"><pre><code class="language-text" data-lang="text">0: jdbc:drill:> show files in dfs.CSV;
-
-+------------+-------------+------------+------------+------------+------------+-------------+------------+------------------+
-| name | isDirectory | isFile | length | owner | group | permissions | accessTime | modificationTime |
-+------------+-------------+------------+------------+------------+------------+-------------+------------+------------------+
-| customers.csv | false | true | 62011 | root | root | rw-r--r-- | 2014-08-04 18:30:39.0 | 2014-08-04 18:30:39.314 |
-| products.csv.small | false | true | 34972 | root | root | rw-r--r-- | 2014-07-31 23:58:42.0 | 2014-07-31 23:59:16.849 |
-| products.csv | false | true | 34972 | root | root | rw-r--r-- | 2014-08-01 06:39:34.0 | 2014-08-04 15:58:09.325 |
-| products.csv.bad | false | true | 62307 | root | root | rw-r--r-- | 2014-08-04 15:58:02.0 | 2014-08-04 15:58:02.612 |
-+------------+-------------+------------+------------+------------+------------+-------------+------------+------------------+
-4 rows selected (0.165 seconds)
-</code></pre></div>
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- <li class="toctree-l3"><a class="reference internal" href="/docs/configuration-options-introduction/">Configuration Options Introduction</a></li>
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- <li class="toctree-l3"><a class="reference internal" href="/docs/start-up-options/">Start-Up Options</a></li>
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- <li class="toctree-l3"><a class="reference internal" href="/docs/planning-and-execution-options/">Planning and Execution Options</a></li>
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- <li class="toctree-l3"><a class="reference internal" href="/docs/persistent-configuration-storage/">Persistent Configuration Storage</a></li>
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- </ul>
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- <li class="toctree-l2"><a class="reference internal" href="/docs/ports-used-by-drill/">Ports Used by Drill</a></li>
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- <li class="toctree-l2"><a class="reference internal" href="/docs/configuring-the-drill-shell/">Configuring the Drill Shell</a></li>
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- </ul>
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- <li class="toctree-l1"><a href="javascript: void(0);">Connect a Data Source</a></li>
- <ul style="display: none">
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- <li class="toctree-l2"><a class="reference internal" href="/docs/connect-a-data-source-introduction/">Connect a Data Source Introduction</a></li>
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- <li class="toctree-l2"><a class="reference internal" href="/docs/storage-plugin-registration/">Storage Plugin Registration</a></li>
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- <li class="toctree-l2"><a href="javascript: void(0);">Storage Plugin Configuration</a></li>
- <ul style="display: none">
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- <li class="toctree-l3"><a class="reference internal" href="/docs/plugin-configuration-basics/">Plugin Configuration Basics</a></li>
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- <li class="toctree-l3"><a class="reference internal" href="/docs/workspaces/">Workspaces</a></li>
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- <li class="toctree-l3"><a class="reference internal" href="/docs/drill-default-input-format/">Drill Default Input Format</a></li>
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- </ul>
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- <li class="toctree-l2"><a class="reference internal" href="/docs/file-system-storage-plugin/">File System Storage Plugin</a></li>
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- <li class="toctree-l2"><a class="reference internal" href="/docs/hbase-storage-plugin/">HBase Storage Plugin</a></li>
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-
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- <li class="toctree-l2"><a class="reference internal" href="/docs/hive-storage-plugin/">Hive Storage Plugin</a></li>
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- <li class="toctree-l2"><a class="reference internal" href="/docs/rdbms-storage-plugin/">RDBMS Storage Plugin</a></li>
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- <li class="toctree-l2"><a class="reference internal" href="/docs/mongodb-storage-plugin/">MongoDB Storage Plugin</a></li>
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- <li class="toctree-l2"><a class="reference internal" href="/docs/mapr-db-format/">MapR-DB Format</a></li>
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- <li class="toctree-l2"><a class="reference internal" href="/docs/s3-storage-plugin/">S3 Storage Plugin</a></li>
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-
- </ul>
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- <li class="toctree-l1 current_section "><a href="javascript: void(0);">ODBC/JDBC Interfaces</a></li>
- <ul class="current_section">
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- <li class="toctree-l2"><a class="reference internal" href="/docs/interfaces-introduction/">Interfaces Introduction</a></li>
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- <li class="toctree-l2"><a class="reference internal" href="/docs/using-the-jdbc-driver/">Using the JDBC Driver</a></li>
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- <li class="toctree-l2"><a class="reference internal" href="/docs/using-jdbc-with-squirrel-on-windows/">Using JDBC with SQuirreL on Windows</a></li>
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- <li class="toctree-l2"><a href="javascript: void(0);">Installing the ODBC Driver</a></li>
- <ul style="">
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- <li class="toctree-l3"><a class="reference internal" href="/docs/installing-the-driver-on-linux/">Installing the Driver on Linux</a></li>
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- <li class="toctree-l3"><a class="reference internal" href="/docs/installing-the-driver-on-mac-os-x/">Installing the Driver on Mac OS X</a></li>
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- <li class="toctree-l3"><a class="reference internal" href="/docs/installing-the-driver-on-windows/">Installing the Driver on Windows</a></li>
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- <li class="toctree-l3 current"><a class="reference internal" href="/docs/installing-the-tdc-file-on-windows/">Installing the TDC File on Windows</a></li>
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- </ul>
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- <li class="toctree-l2"><a href="javascript: void(0);">Configuring ODBC</a></li>
- <ul style="display: none">
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- <li class="toctree-l3"><a class="reference internal" href="/docs/odbc-configuration-reference/">ODBC Configuration Reference</a></li>
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- <li class="toctree-l3"><a class="reference internal" href="/docs/configuring-odbc-on-linux/">Configuring ODBC on Linux</a></li>
-
- <li class="toctree-l3"><a class="reference internal" href="/docs/configuring-odbc-on-mac-os-x/">Configuring ODBC on Mac OS X</a></li>
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- <li class="toctree-l3"><a class="reference internal" href="/docs/configuring-odbc-on-windows/">Configuring ODBC on Windows</a></li>
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- <li class="toctree-l3"><a class="reference internal" href="/docs/testing-the-odbc-connection/">Testing the ODBC Connection</a></li>
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- </ul>
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- <li class="toctree-l2"><a href="javascript: void(0);">Using Drill Explorer</a></li>
- <ul style="display: none">
-
- <li class="toctree-l3"><a class="reference internal" href="/docs/drill-explorer-introduction/">Drill Explorer Introduction</a></li>
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- <li class="toctree-l3"><a class="reference internal" href="/docs/connecting-drill-explorer-to-data/">Connecting Drill Explorer to Data</a></li>
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- <li class="toctree-l3"><a class="reference internal" href="/docs/browsing-data-and-defining-views/">Browsing Data and Defining Views</a></li>
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- </ul>
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- <li class="toctree-l2"><a href="javascript: void(0);">Using Drill with BI Tools</a></li>
- <ul style="display: none">
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- <li class="toctree-l3"><a class="reference internal" href="/docs/using-drill-with-bi-tools-introduction/">Using Drill with BI Tools Introduction</a></li>
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- <li class="toctree-l3"><a class="reference internal" href="/docs/tableau-examples/">Tableau Examples</a></li>
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- <li class="toctree-l3"><a class="reference internal" href="/docs/using-microstrategy-analytics-with-apache-drill/">Using MicroStrategy Analytics with Apache Drill</a></li>
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- <li class="toctree-l3"><a class="reference internal" href="/docs/using-tibco-spotfire-desktop-with-drill/">Using Tibco Spotfire Desktop with Drill</a></li>
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- <li class="toctree-l3"><a class="reference internal" href="/docs/configuring-tibco-spotfire-server-with-drill/">Configuring Tibco Spotfire Server with Drill</a></li>
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- <li class="toctree-l3"><a class="reference internal" href="/docs/using-qlik-sense-with-drill/">Using Qlik Sense with Drill</a></li>
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- <li class="toctree-l3"><a class="reference internal" href="/docs/using-apache-drill-with-tableau-9-server/">Using Apache Drill with Tableau 9 Server</a></li>
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- <li class="toctree-l3"><a class="reference internal" href="/docs/using-information-builders-webfocus-with-apache-drill/">Using Information Builders\u2019 WebFOCUS with Apache Drill</a></li>
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- <li class="toctree-l3"><a class="reference internal" href="/docs/configuring-jreport-with-drill/">Configuring JReport with Drill</a></li>
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- <li class="toctree-l3"><a class="reference internal" href="/docs/using-apache-drill-with-tableau-9-desktop/">Using Apache Drill with Tableau 9 Desktop</a></li>
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- </ul>
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- </ul>
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- <li class="toctree-l1"><a href="javascript: void(0);">Query Data</a></li>
- <ul style="display: none">
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- <li class="toctree-l2"><a class="reference internal" href="/docs/query-data-introduction/">Query Data Introduction</a></li>
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- <li class="toctree-l2"><a href="javascript: void(0);">Querying a File System</a></li>
- <ul style="display: none">
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- <li class="toctree-l3"><a class="reference internal" href="/docs/querying-a-file-system-introduction/">Querying a File System Introduction</a></li>
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- <li class="toctree-l3"><a class="reference internal" href="/docs/querying-avro-files/">Querying Avro Files</a></li>
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- <li class="toctree-l3"><a class="reference internal" href="/docs/querying-json-files/">Querying JSON Files</a></li>
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- <li class="toctree-l3"><a class="reference internal" href="/docs/querying-parquet-files/">Querying Parquet Files</a></li>
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- <li class="toctree-l3"><a class="reference internal" href="/docs/querying-plain-text-files/">Querying Plain Text Files</a></li>
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- <li class="toctree-l3"><a class="reference internal" href="/docs/querying-directories/">Querying Directories</a></li>
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- <li class="toctree-l3"><a class="reference internal" href="/docs/querying-sequence-files/">Querying Sequence Files</a></li>
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- </ul>
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- <li class="toctree-l2"><a class="reference internal" href="/docs/querying-hbase/">Querying HBase</a></li>
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- <li class="toctree-l2"><a href="javascript: void(0);">Querying Complex Data</a></li>
- <ul style="display: none">
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- <li class="toctree-l3"><a class="reference internal" href="/docs/querying-complex-data-introduction/">Querying Complex Data Introduction</a></li>
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- <li class="toctree-l3"><a class="reference internal" href="/docs/sample-data-donuts/">Sample Data: Donuts</a></li>
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- <li class="toctree-l3"><a class="reference internal" href="/docs/selecting-flat-data/">Selecting Flat Data</a></li>
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- <li class="toctree-l3"><a class="reference internal" href="/docs/using-sql-functions-clauses-and-joins/">Using SQL Functions, Clauses, and Joins</a></li>
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- <li class="toctree-l3"><a class="reference internal" href="/docs/selecting-nested-data-for-a-column/">Selecting Nested Data for a Column</a></li>
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- <li class="toctree-l3"><a class="reference internal" href="/docs/selecting-multiple-columns-within-nested-data/">Selecting Multiple Columns Within Nested Data</a></li>
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- </ul>
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-
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- <li class="toctree-l2"><a class="reference internal" href="/docs/querying-hive/">Querying Hive</a></li>
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-
- <li class="toctree-l2"><a class="reference internal" href="/docs/querying-the-information-schema/">Querying the INFORMATION SCHEMA</a></li>
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- <li class="toctree-l2"><a class="reference internal" href="/docs/querying-system-tables/">Querying System Tables</a></li>
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- <li class="toctree-l2"><a class="reference internal" href="/docs/monitoring-and-canceling-queries-in-the-drill-web-console/">Monitoring and Canceling Queries in the Drill Web Console</a></li>
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-
- </ul>
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-
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- <li class="toctree-l1"><a href="javascript: void(0);">Performance Tuning</a></li>
- <ul style="display: none">
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- <li class="toctree-l2"><a class="reference internal" href="/docs/performance-tuning-introduction/">Performance Tuning Introduction</a></li>
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- <li class="toctree-l2"><a href="javascript: void(0);">Partition Pruning</a></li>
- <ul style="display: none">
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- <li class="toctree-l3"><a class="reference internal" href="/docs/partition-pruning-introduction/">Partition Pruning Introduction</a></li>
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- <li class="toctree-l3"><a class="reference internal" href="/docs/how-to-partition-data/">How to Partition Data</a></li>
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- </ul>
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- <li class="toctree-l2"><a class="reference internal" href="/docs/asynchronous-parquet-reader/">Asynchronous Parquet Reader</a></li>
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- <li class="toctree-l2"><a class="reference internal" href="/docs/optimizing-parquet-metadata-reading/">Optimizing Parquet Metadata Reading</a></li>
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- <li class="toctree-l2"><a class="reference internal" href="/docs/parquet-filter-pushdown/">Parquet Filter Pushdown</a></li>
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- <li class="toctree-l2"><a class="reference internal" href="/docs/hive-metadata-caching/">Hive Metadata Caching</a></li>
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- <li class="toctree-l2"><a class="reference internal" href="/docs/choosing-a-storage-format/">Choosing a Storage Format</a></li>
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- <li class="toctree-l2"><a href="javascript: void(0);">Query Plans and Tuning</a></li>
- <ul style="display: none">
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- <li class="toctree-l3"><a class="reference internal" href="/docs/query-plans-and-tuning-introduction/">Query Plans and Tuning Introduction</a></li>
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- <li class="toctree-l3"><a class="reference internal" href="/docs/join-planning-guidelines/">Join Planning Guidelines</a></li>
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- <li class="toctree-l3"><a class="reference internal" href="/docs/guidelines-for-optimizing-aggregation/">Guidelines for Optimizing Aggregation</a></li>
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- <li class="toctree-l3"><a class="reference internal" href="/docs/modifying-query-planning-options/">Modifying Query Planning Options</a></li>
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- <li class="toctree-l3"><a class="reference internal" href="/docs/sort-based-and-hash-based-memory-constrained-operators/">Sort-Based and Hash-Based Memory-Constrained Operators</a></li>
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- <li class="toctree-l3"><a class="reference internal" href="/docs/enabling-query-queuing/">Enabling Query Queuing</a></li>
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- <li class="toctree-l3"><a class="reference internal" href="/docs/controlling-parallelization-to-balance-performance-with-multi-tenancy/">Controlling Parallelization to Balance Performance with Multi-Tenancy</a></li>
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- </ul>
-
-
-
- <li class="toctree-l2"><a href="javascript: void(0);">Identifying Performance Issues</a></li>
- <ul style="display: none">
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- <li class="toctree-l3"><a class="reference internal" href="/docs/query-plans/">Query Plans</a></li>
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- <li class="toctree-l3"><a class="reference internal" href="/docs/query-profiles/">Query Profiles</a></li>
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- </ul>
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- <li class="toctree-l2"><a href="javascript: void(0);">Performance Tuning Reference</a></li>
- <ul style="display: none">
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- <li class="toctree-l3"><a class="reference internal" href="/docs/query-profile-column-descriptions/">Query Profile Column Descriptions</a></li>
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- <li class="toctree-l3"><a class="reference internal" href="/docs/physical-operators/">Physical Operators</a></li>
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- </ul>
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- <li class="toctree-l2"><a class="reference internal" href="/docs/monitoring-metrics/">Monitoring Metrics</a></li>
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- </ul>
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- <li class="toctree-l1"><a href="javascript: void(0);">Log and Debug</a></li>
- <ul style="display: none">
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- <li class="toctree-l2"><a class="reference internal" href="/docs/log-and-debug-introduction/">Log and Debug Introduction</a></li>
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- <li class="toctree-l2"><a class="reference internal" href="/docs/error-messages/">Error Messages</a></li>
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- <li class="toctree-l2"><a class="reference internal" href="/docs/modify-logback-xml/">Modify logback.xml</a></li>
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- <li class="toctree-l2"><a class="reference internal" href="/docs/review-the-java-stack-trace/">Review the Java Stack Trace</a></li>
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- <li class="toctree-l2"><a class="reference internal" href="/docs/query-audit-logging/">Query Audit Logging</a></li>
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- </ul>
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- <li class="toctree-l1"><a href="javascript: void(0);">SQL Reference</a></li>
- <ul style="display: none">
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- <li class="toctree-l2"><a class="reference internal" href="/docs/sql-reference-introduction/">SQL Reference Introduction</a></li>
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- <li class="toctree-l2"><a href="javascript: void(0);">Data Types</a></li>
- <ul style="display: none">
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- <li class="toctree-l3"><a class="reference internal" href="/docs/supported-data-types/">Supported Data Types</a></li>
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- <li class="toctree-l3"><a class="reference internal" href="/docs/date-time-and-timestamp/">Date, Time, and Timestamp</a></li>
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- <li class="toctree-l3"><a class="reference internal" href="/docs/handling-different-data-types/">Handling Different Data Types</a></li>
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- </ul>
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- <li class="toctree-l2"><a class="reference internal" href="/docs/lexical-structure/">Lexical Structure</a></li>
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- <li class="toctree-l2"><a class="reference internal" href="/docs/operators/">Operators</a></li>
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- <li class="toctree-l2"><a href="javascript: void(0);">SQL Functions</a></li>
- <ul style="display: none">
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- <li class="toctree-l3"><a class="reference internal" href="/docs/about-sql-function-examples/">About SQL Function Examples</a></li>
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- <li class="toctree-l3"><a class="reference internal" href="/docs/math-and-trig/">Math and Trig</a></li>
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- <li class="toctree-l3"><a class="reference internal" href="/docs/data-type-conversion/">Data Type Conversion</a></li>
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- <li class="toctree-l3"><a class="reference internal" href="/docs/date-time-functions-and-arithmetic/">Date/Time Functions and Arithmetic</a></li>
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- <li class="toctree-l3"><a class="reference internal" href="/docs/string-manipulation/">String Manipulation</a></li>
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- <li class="toctree-l3"><a class="reference internal" href="/docs/aggregate-and-aggregate-statistical/">Aggregate and Aggregate Statistical</a></li>
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- <li class="toctree-l3"><a class="reference internal" href="/docs/functions-for-handling-nulls/">Functions for Handling Nulls</a></li>
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- </ul>
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- <li class="toctree-l2"><a href="javascript: void(0);">SQL Window Functions</a></li>
- <ul style="display: none">
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- <li class="toctree-l3"><a class="reference internal" href="/docs/sql-window-functions-introduction/">SQL Window Functions Introduction</a></li>
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- <li class="toctree-l3"><a class="reference internal" href="/docs/aggregate-window-functions/">Aggregate Window Functions</a></li>
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- <li class="toctree-l3"><a class="reference internal" href="/docs/ranking-window-functions/">Ranking Window Functions</a></li>
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- <li class="toctree-l3"><a class="reference internal" href="/docs/value-window-functions/">Value Window Functions</a></li>
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- <li class="toctree-l3"><a class="reference internal" href="/docs/sql-window-functions-examples/">SQL Window Functions Examples</a></li>
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- </ul>
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- <li class="toctree-l2"><a href="javascript: void(0);">Nested Data Functions</a></li>
- <ul style="display: none">
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- <li class="toctree-l3"><a class="reference internal" href="/docs/nested-data-limitations/">Nested Data Limitations</a></li>
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- <li class="toctree-l3"><a class="reference internal" href="/docs/flatten/">FLATTEN</a></li>
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- <li class="toctree-l3"><a class="reference internal" href="/docs/kvgen/">KVGEN</a></li>
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- <li class="toctree-l3"><a class="reference internal" href="/docs/repeated-count/">REPEATED_COUNT</a></li>
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- <li class="toctree-l3"><a class="reference internal" href="/docs/repeated-contains/">REPEATED_CONTAINS</a></li>
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- </ul>
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- <li class="toctree-l2"><a class="reference internal" href="/docs/query-directory-functions/">Query Directory Functions</a></li>
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- <li class="toctree-l3"><a class="reference internal" href="/docs/supported-sql-commands/">Supported SQL Commands</a></li>
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- <li class="toctree-l3"><a class="reference internal" href="/docs/set/">SET</a></li>
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- <li class="toctree-l3"><a class="reference internal" href="/docs/reset/">RESET</a></li>
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- <li class="toctree-l3"><a class="reference internal" href="/docs/alter-system/">ALTER SYSTEM</a></li>
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- <li class="toctree-l3"><a class="reference internal" href="/docs/create-table-as-ctas/">CREATE TABLE AS (CTAS)</a></li>
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- <li class="toctree-l3"><a class="reference internal" href="/docs/create-function-using-jar/">CREATE FUNCTION USING JAR</a></li>
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- <li class="toctree-l3"><a class="reference internal" href="/docs/partition-by-clause/">PARTITION BY Clause</a></li>
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- <li class="toctree-l3"><a class="reference internal" href="/docs/create-view/">CREATE VIEW</a></li>
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- <li class="toctree-l3"><a class="reference internal" href="/docs/describe/">DESCRIBE</a></li>
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- <li class="toctree-l3"><a class="reference internal" href="/docs/drop-function-using-jar/">DROP FUNCTION USING JAR</a></li>
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- <li class="toctree-l3"><a class="reference internal" href="/docs/drop-table/">DROP TABLE</a></li>
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- <li class="toctree-l3"><a class="reference internal" href="/docs/drop-view/">DROP VIEW</a></li>
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- <li class="toctree-l3"><a class="reference internal" href="/docs/explain/">EXPLAIN</a></li>
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- <li class="toctree-l3"><a class="reference internal" href="/docs/select/">SELECT</a></li>
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- <li class="toctree-l3"><a class="reference internal" href="/docs/select-list/">SELECT List</a></li>
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- <li class="toctree-l3"><a class="reference internal" href="/docs/from-clause/">FROM Clause</a></li>
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- <li class="toctree-l3"><a class="reference internal" href="/docs/group-by-clause/">GROUP BY Clause</a></li>
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- <li class="toctree-l3"><a class="reference internal" href="/docs/having-clause/">HAVING Clause</a></li>
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- <li class="toctree-l3"><a class="reference internal" href="/docs/limit-clause/">LIMIT Clause</a></li>
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- <li class="toctree-l3"><a class="reference internal" href="/docs/offset-clause/">OFFSET Clause</a></li>
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- <li class="toctree-l3"><a class="reference internal" href="/docs/order-by-clause/">ORDER BY Clause</a></li>
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- <li class="toctree-l3"><a class="reference internal" href="/docs/union-set-operator/">UNION Set Operator</a></li>
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- <li class="toctree-l3"><a class="reference internal" href="/docs/where-clause/">WHERE Clause</a></li>
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- <li class="toctree-l3"><a class="reference internal" href="/docs/with-clause/">WITH Clause</a></li>
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- <li class="toctree-l3"><a class="reference internal" href="/docs/show-databases-and-show-schemas/">SHOW DATABASES and SHOW SCHEMAS</a></li>
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- <li class="toctree-l3"><a class="reference internal" href="/docs/show-files/">SHOW FILES</a></li>
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- <li class="toctree-l3"><a class="reference internal" href="/docs/show-tables/">SHOW TABLES</a></li>
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- <li class="toctree-l3"><a class="reference internal" href="/docs/use/">USE</a></li>
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- <li class="toctree-l2"><a href="javascript: void(0);">SQL Conditional Expressions</a></li>
- <ul style="display: none">
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- <li class="toctree-l3"><a class="reference internal" href="/docs/case/">CASE</a></li>
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- <li class="toctree-l2"><a class="reference internal" href="/docs/reserved-keywords/">Reserved Keywords</a></li>
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- <li class="toctree-l2"><a class="reference internal" href="/docs/sql-extensions/">SQL Extensions</a></li>
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- </ul>
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- <li class="toctree-l1"><a href="javascript: void(0);">Data Sources and File Formats</a></li>
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- <li class="toctree-l2"><a class="reference internal" href="/docs/configure-drill-introduction/">Configure Drill Introduction</a></li>
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- <li class="toctree-l2"><a class="reference internal" href="/docs/configuring-drill-memory/">Configuring Drill Memory</a></li>
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- <li class="toctree-l2"><a href="javascript: void(0);">Configuring a Multitenant Cluster</a></li>
- <ul style="display: none">
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- <li class="toctree-l3"><a class="reference internal" href="/docs/configuring-a-multitenant-cluster-introduction/">Configuring a Multitenant Cluster Introduction</a></li>
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- <li class="toctree-l3"><a class="reference internal" href="/docs/configuring-multitenant-resources/">Configuring Multitenant Resources</a></li>
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- <li class="toctree-l3"><a class="reference internal" href="/docs/configuring-resources-for-a-shared-drillbit/">Configuring Resources for a Shared Drillbit</a></li>
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- </ul>
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- <li class="toctree-l2"><a class="reference internal" href="/docs/configuring-user-impersonation/">Configuring User Impersonation</a></li>
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- <li class="toctree-l2"><a class="reference internal" href="/docs/configuring-user-authentication/">Configuring User Authentication</a></li>
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- <li class="toctree-l2"><a class="reference internal" href="/docs/configuring-user-impersonation-with-hive-authorization/">Configuring User Impersonation with Hive Authorization</a></li>
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- <li class="toctree-l2"><a class="reference internal" href="/docs/configuring-web-console-and-rest-api-security/">Configuring Web Console and REST API Security</a></li>
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- <li class="toctree-l2"><a href="javascript: void(0);">Configuration Options</a></li>
- <ul style="display: none">
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- <li class="toctree-l3"><a class="reference internal" href="/docs/configuration-options-introduction/">Configuration Options Introduction</a></li>
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- <li class="toctree-l3"><a class="reference internal" href="/docs/start-up-options/">Start-Up Options</a></li>
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- <li class="toctree-l3"><a class="reference internal" href="/docs/planning-and-execution-options/">Planning and Execution Options</a></li>
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- <li class="toctree-l3"><a class="reference internal" href="/docs/persistent-configuration-storage/">Persistent Configuration Storage</a></li>
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- </ul>
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- <li class="toctree-l2"><a class="reference internal" href="/docs/ports-used-by-drill/">Ports Used by Drill</a></li>
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- <li class="toctree-l2"><a class="reference internal" href="/docs/configuring-the-drill-shell/">Configuring the Drill Shell</a></li>
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-
- </ul>
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- <li class="toctree-l1 current_section "><a href="javascript: void(0);">Connect a Data Source</a></li>
- <ul class="current_section">
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- <li class="toctree-l2"><a class="reference internal" href="/docs/connect-a-data-source-introduction/">Connect a Data Source Introduction</a></li>
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- <li class="toctree-l2"><a class="reference internal" href="/docs/storage-plugin-registration/">Storage Plugin Registration</a></li>
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- <li class="toctree-l2"><a href="javascript: void(0);">Storage Plugin Configuration</a></li>
- <ul style="display: none">
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- <li class="toctree-l3"><a class="reference internal" href="/docs/plugin-configuration-basics/">Plugin Configuration Basics</a></li>
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- <li class="toctree-l3"><a class="reference internal" href="/docs/file-system-storage-plugin/">File System Storage Plugin</a></li>
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- <li class="toctree-l3"><a class="reference internal" href="/docs/workspaces/">Workspaces</a></li>
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- <li class="toctree-l3"><a class="reference internal" href="/docs/hbase-storage-plugin/">HBase Storage Plugin</a></li>
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- <li class="toctree-l3"><a class="reference internal" href="/docs/hive-storage-plugin/">Hive Storage Plugin</a></li>
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- <li class="toctree-l3"><a class="reference internal" href="/docs/drill-default-input-format/">Drill Default Input Format</a></li>
-
- </ul>
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- <li class="toctree-l2 current"><a class="reference internal" href="/docs/mongodb-plugin-for-apache-drill/">MongoDB Plugin for Apache Drill</a></li>
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- <li class="toctree-l2"><a class="reference internal" href="/docs/mapr-db-format/">MapR-DB Format</a></li>
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- </ul>
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- <li class="toctree-l1"><a href="javascript: void(0);">ODBC/JDBC Interfaces</a></li>
- <ul style="display: none">
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- <li class="toctree-l2"><a class="reference internal" href="/docs/interfaces-introduction/">Interfaces Introduction</a></li>
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- <li class="toctree-l2"><a class="reference internal" href="/docs/using-the-jdbc-driver/">Using the JDBC Driver</a></li>
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- <li class="toctree-l2"><a class="reference internal" href="/docs/using-jdbc-with-squirrel-on-windows/">Using JDBC with SQuirreL on Windows</a></li>
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- <li class="toctree-l2"><a href="javascript: void(0);">Installing the ODBC Driver</a></li>
- <ul style="display: none">
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- <li class="toctree-l3"><a class="reference internal" href="/docs/installing-the-driver-on-linux/">Installing the Driver on Linux</a></li>
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- <li class="toctree-l3"><a class="reference internal" href="/docs/installing-the-driver-on-mac-os-x/">Installing the Driver on Mac OS X</a></li>
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- <li class="toctree-l3"><a class="reference internal" href="/docs/installing-the-driver-on-windows/">Installing the Driver on Windows</a></li>
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- <li class="toctree-l3"><a class="reference internal" href="/docs/installing-the-tdc-file-on-windows/">Installing the TDC File on Windows</a></li>
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- </ul>
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-
-
- <li class="toctree-l2"><a href="javascript: void(0);">Configuring ODBC</a></li>
- <ul style="display: none">
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- <li class="toctree-l3"><a class="reference internal" href="/docs/odbc-configuration-reference/">ODBC Configuration Reference</a></li>
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- <li class="toctree-l3"><a class="reference internal" href="/docs/configuring-odbc-on-linux/">Configuring ODBC on Linux</a></li>
-
- <li class="toctree-l3"><a class="reference internal" href="/docs/configuring-odbc-on-mac-os-x/">Configuring ODBC on Mac OS X</a></li>
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- <li class="toctree-l3"><a class="reference internal" href="/docs/configuring-odbc-on-windows/">Configuring ODBC on Windows</a></li>
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- <li class="toctree-l3"><a class="reference internal" href="/docs/testing-the-odbc-connection/">Testing the ODBC Connection</a></li>
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- </ul>
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- <li class="toctree-l2"><a href="javascript: void(0);">Using Drill Explorer</a></li>
- <ul style="display: none">
-
- <li class="toctree-l3"><a class="reference internal" href="/docs/drill-explorer-introduction/">Drill Explorer Introduction</a></li>
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- <li class="toctree-l3"><a class="reference internal" href="/docs/connecting-drill-explorer-to-data/">Connecting Drill Explorer to Data</a></li>
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- <li class="toctree-l3"><a class="reference internal" href="/docs/browsing-data-and-defining-views/">Browsing Data and Defining Views</a></li>
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- </ul>
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-
- <li class="toctree-l2"><a href="javascript: void(0);">Using Drill with BI Tools</a></li>
- <ul style="display: none">
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- <li class="toctree-l3"><a class="reference internal" href="/docs/using-drill-with-bi-tools-introduction/">Using Drill with BI Tools Introduction</a></li>
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- <li class="toctree-l3"><a class="reference internal" href="/docs/tableau-examples/">Tableau Examples</a></li>
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- <li class="toctree-l3"><a class="reference internal" href="/docs/using-microstrategy-analytics-with-apache-drill/">Using MicroStrategy Analytics with Apache Drill</a></li>
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- <li class="toctree-l3"><a class="reference internal" href="/docs/using-tibco-spotfire-desktop-with-drill/">Using Tibco Spotfire Desktop with Drill</a></li>
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- <li class="toctree-l3"><a class="reference internal" href="/docs/configuring-tibco-spotfire-server-with-drill/">Configuring Tibco Spotfire Server with Drill</a></li>
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- <li class="toctree-l3"><a class="reference internal" href="/docs/using-qlik-sense-with-drill/">Using Qlik Sense with Drill</a></li>
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- <li class="toctree-l3"><a class="reference internal" href="/docs/using-apache-drill-with-tableau-9-desktop/">Using Apache Drill with Tableau 9 Desktop</a></li>
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- <li class="toctree-l3"><a class="reference internal" href="/docs/using-apache-drill-with-tableau-9-server/">Using Apache Drill with Tableau 9 Server</a></li>
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- <li class="toctree-l3"><a class="reference internal" href="/docs/configuring-jreport-with-drill/">Configuring JReport with Drill</a></li>
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- </ul>
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-
- </ul>
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-
-
- <li class="toctree-l1"><a href="javascript: void(0);">Query Data</a></li>
- <ul style="display: none">
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- <li class="toctree-l2"><a class="reference internal" href="/docs/query-data-introduction/">Query Data Introduction</a></li>
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- <li class="toctree-l2"><a href="javascript: void(0);">Querying a File System</a></li>
- <ul style="display: none">
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- <li class="toctree-l3"><a class="reference internal" href="/docs/querying-a-file-system-introduction/">Querying a File System Introduction</a></li>
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- <li class="toctree-l3"><a class="reference internal" href="/docs/querying-json-files/">Querying JSON Files</a></li>
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- <li class="toctree-l3"><a class="reference internal" href="/docs/querying-parquet-files/">Querying Parquet Files</a></li>
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- <li class="toctree-l3"><a class="reference internal" href="/docs/querying-plain-text-files/">Querying Plain Text Files</a></li>
-
- <li class="toctree-l3"><a class="reference internal" href="/docs/querying-directories/">Querying Directories</a></li>
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- </ul>
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- <li class="toctree-l2"><a class="reference internal" href="/docs/querying-hbase/">Querying HBase</a></li>
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- <li class="toctree-l2"><a href="javascript: void(0);">Querying Complex Data</a></li>
- <ul style="display: none">
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- <li class="toctree-l3"><a class="reference internal" href="/docs/querying-complex-data-introduction/">Querying Complex Data Introduction</a></li>
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- <li class="toctree-l3"><a class="reference internal" href="/docs/sample-data-donuts/">Sample Data: Donuts</a></li>
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- <li class="toctree-l3"><a class="reference internal" href="/docs/selecting-flat-data/">Selecting Flat Data</a></li>
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- <li class="toctree-l3"><a class="reference internal" href="/docs/using-sql-functions-clauses-and-joins/">Using SQL Functions, Clauses, and Joins</a></li>
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- <li class="toctree-l3"><a class="reference internal" href="/docs/selecting-nested-data-for-a-column/">Selecting Nested Data for a Column</a></li>
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- <li class="toctree-l3"><a class="reference internal" href="/docs/selecting-multiple-columns-within-nested-data/">Selecting Multiple Columns Within Nested Data</a></li>
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- </ul>
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- <li class="toctree-l2"><a class="reference internal" href="/docs/querying-hive/">Querying Hive</a></li>
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- <li class="toctree-l2"><a class="reference internal" href="/docs/querying-the-information-schema/">Querying the INFORMATION SCHEMA</a></li>
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- <li class="toctree-l2"><a class="reference internal" href="/docs/querying-system-tables/">Querying System Tables</a></li>
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-
-
- <li class="toctree-l2"><a class="reference internal" href="/docs/monitoring-and-canceling-queries-in-the-drill-web-console/">Monitoring and Canceling Queries in the Drill Web Console</a></li>
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-
- </ul>
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-
-
- <li class="toctree-l1"><a href="javascript: void(0);">Performance Tuning</a></li>
- <ul style="display: none">
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- <li class="toctree-l2"><a class="reference internal" href="/docs/performance-tuning-introduction/">Performance Tuning Introduction</a></li>
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- <li class="toctree-l2"><a class="reference internal" href="/docs/partition-pruning/">Partition Pruning</a></li>
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-
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- <li class="toctree-l2"><a class="reference internal" href="/docs/optimizing-parquet-metadata-reading/">Optimizing Parquet Metadata Reading</a></li>
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-
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- <li class="toctree-l2"><a class="reference internal" href="/docs/choosing-a-storage-format/">Choosing a Storage Format</a></li>
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- <li class="toctree-l2"><a href="javascript: void(0);">Query Plans and Tuning</a></li>
- <ul style="display: none">
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- <li class="toctree-l3"><a class="reference internal" href="/docs/query-plans-and-tuning-introduction/">Query Plans and Tuning Introduction</a></li>
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- <li class="toctree-l3"><a class="reference internal" href="/docs/join-planning-guidelines/">Join Planning Guidelines</a></li>
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- <li class="toctree-l3"><a class="reference internal" href="/docs/guidelines-for-optimizing-aggregation/">Guidelines for Optimizing Aggregation</a></li>
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- <li class="toctree-l3"><a class="reference internal" href="/docs/modifying-query-planning-options/">Modifying Query Planning Options</a></li>
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- <li class="toctree-l3"><a class="reference internal" href="/docs/sort-based-and-hash-based-memory-constrained-operators/">Sort-Based and Hash-Based Memory-Constrained Operators</a></li>
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- <li class="toctree-l3"><a class="reference internal" href="/docs/enabling-query-queuing/">Enabling Query Queuing</a></li>
-
- <li class="toctree-l3"><a class="reference internal" href="/docs/controlling-parallelization-to-balance-performance-with-multi-tenancy/">Controlling Parallelization to Balance Performance with Multi-Tenancy</a></li>
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- </ul>
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-
-
- <li class="toctree-l2"><a href="javascript: void(0);">Identifying Performance Issues</a></li>
- <ul style="display: none">
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- <li class="toctree-l3"><a class="reference internal" href="/docs/query-plans/">Query Plans</a></li>
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- <li class="toctree-l3"><a class="reference internal" href="/docs/query-profiles/">Query Profiles</a></li>
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- </ul>
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- <li class="toctree-l2"><a href="javascript: void(0);">Performance Tuning Reference</a></li>
- <ul style="display: none">
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- <li class="toctree-l3"><a class="reference internal" href="/docs/query-profile-column-descriptions/">Query Profile Column Descriptions</a></li>
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- <li class="toctree-l3"><a class="reference internal" href="/docs/physical-operators/">Physical Operators</a></li>
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- </ul>
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- </ul>
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- <li class="toctree-l1"><a href="javascript: void(0);">Log and Debug</a></li>
- <ul style="display: none">
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- <li class="toctree-l2"><a class="reference internal" href="/docs/log-and-debug-introduction/">Log and Debug Introduction</a></li>
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- <li class="toctree-l2"><a class="reference internal" href="/docs/error-messages/">Error Messages</a></li>
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- <li class="toctree-l2"><a class="reference internal" href="/docs/modify-logback-xml/">Modify logback.xml</a></li>
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- <li class="toctree-l2"><a class="reference internal" href="/docs/review-the-java-stack-trace/">Review the Java Stack Trace</a></li>
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- <li class="toctree-l2"><a class="reference internal" href="/docs/query-audit-logging/">Query Audit Logging</a></li>
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- </ul>
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- <li class="toctree-l1"><a href="javascript: void(0);">SQL Reference</a></li>
- <ul style="display: none">
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- <li class="toctree-l2"><a class="reference internal" href="/docs/sql-reference-introduction/">SQL Reference Introduction</a></li>
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- <li class="toctree-l2"><a href="javascript: void(0);">Data Types</a></li>
- <ul style="display: none">
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- <li class="toctree-l3"><a class="reference internal" href="/docs/supported-data-types/">Supported Data Types</a></li>
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- <li class="toctree-l3"><a class="reference internal" href="/docs/date-time-and-timestamp/">Date, Time, and Timestamp</a></li>
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- <li class="toctree-l3"><a class="reference internal" href="/docs/handling-different-data-types/">Handling Different Data Types</a></li>
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- </ul>
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- <li class="toctree-l2"><a class="reference internal" href="/docs/lexical-structure/">Lexical Structure</a></li>
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- <li class="toctree-l2"><a class="reference internal" href="/docs/operators/">Operators</a></li>
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- <li class="toctree-l2"><a href="javascript: void(0);">SQL Functions</a></li>
- <ul style="display: none">
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- <li class="toctree-l3"><a class="reference internal" href="/docs/about-sql-function-examples/">About SQL Function Examples</a></li>
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- <li class="toctree-l3"><a class="reference internal" href="/docs/math-and-trig/">Math and Trig</a></li>
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- <li class="toctree-l3"><a class="reference internal" href="/docs/data-type-conversion/">Data Type Conversion</a></li>
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- <li class="toctree-l3"><a class="reference internal" href="/docs/date-time-functions-and-arithmetic/">Date/Time Functions and Arithmetic</a></li>
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- <li class="toctree-l3"><a class="reference internal" href="/docs/string-manipulation/">String Manipulation</a></li>
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- <li class="toctree-l3"><a class="reference internal" href="/docs/aggregate-and-aggregate-statistical/">Aggregate and Aggregate Statistical</a></li>
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- <li class="toctree-l3"><a class="reference internal" href="/docs/functions-for-handling-nulls/">Functions for Handling Nulls</a></li>
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- </ul>
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- <li class="toctree-l2"><a href="javascript: void(0);">SQL Window Functions</a></li>
- <ul style="display: none">
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- <li class="toctree-l3"><a class="reference internal" href="/docs/sql-window-functions-introduction/">SQL Window Functions Introduction</a></li>
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- <li class="toctree-l3"><a class="reference internal" href="/docs/aggregate-window-functions/">Aggregate Window Functions</a></li>
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- <li class="toctree-l3"><a class="reference internal" href="/docs/ranking-window-functions/">Ranking Window Functions</a></li>
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- <li class="toctree-l3"><a class="reference internal" href="/docs/value-window-functions/">Value Window Functions</a></li>
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- <li class="toctree-l3"><a class="reference internal" href="/docs/sql-window-functions-examples/">SQL Window Functions Examples</a></li>
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- </ul>
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- <li class="toctree-l2"><a href="javascript: void(0);">Nested Data Functions</a></li>
- <ul style="display: none">
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- <li class="toctree-l3"><a class="reference internal" href="/docs/nested-data-limitations/">Nested Data Limitations</a></li>
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- <li class="toctree-l3"><a class="reference internal" href="/docs/flatten/">FLATTEN</a></li>
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- <li class="toctree-l3"><a class="reference internal" href="/docs/kvgen/">KVGEN</a></li>
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- <li class="toctree-l3"><a class="reference internal" href="/docs/repeated-count/">REPEATED_COUNT</a></li>
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- <li class="toctree-l3"><a class="reference internal" href="/docs/repeated-contains/">REPEATED_CONTAINS</a></li>
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- </ul>
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- <li class="toctree-l2"><a class="reference internal" href="/docs/query-directory-functions/">Query Directory Functions</a></li>
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- <li class="toctree-l2"><a href="javascript: void(0);">SQL Commands</a></li>
- <ul style="display: none">
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- <li class="toctree-l3"><a class="reference internal" href="/docs/supported-sql-commands/">Supported SQL Commands</a></li>
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- <li class="toctree-l3"><a class="reference internal" href="/docs/alter-session/">ALTER SESSION</a></li>
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- <li class="toctree-l3"><a class="reference internal" href="/docs/alter-system/">ALTER SYSTEM</a></li>
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- <li class="toctree-l3"><a class="reference internal" href="/docs/create-table-as-ctas/">CREATE TABLE AS (CTAS)</a></li>
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- <li class="toctree-l3"><a class="reference internal" href="/docs/partition-by-clause/">PARTITION BY Clause</a></li>
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- <li class="toctree-l3"><a class="reference internal" href="/docs/create-view/">CREATE VIEW</a></li>
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- <li class="toctree-l3"><a class="reference internal" href="/docs/describe/">DESCRIBE</a></li>
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- <li class="toctree-l3"><a class="reference internal" href="/docs/drop-table/">DROP TABLE</a></li>
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- <li class="toctree-l3"><a class="reference internal" href="/docs/drop-view/">DROP VIEW</a></li>
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- <li class="toctree-l3"><a class="reference internal" href="/docs/explain/">EXPLAIN</a></li>
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- <li class="toctree-l3"><a class="reference internal" href="/docs/select/">SELECT</a></li>
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- <li class="toctree-l3"><a class="reference internal" href="/docs/select-list/">SELECT List</a></li>
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- <li class="toctree-l3"><a class="reference internal" href="/docs/from-clause/">FROM Clause</a></li>
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- <li class="toctree-l3"><a class="reference internal" href="/docs/group-by-clause/">GROUP BY Clause</a></li>
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- <li class="toctree-l3"><a class="reference internal" href="/docs/having-clause/">HAVING Clause</a></li>
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- <li class="toctree-l3"><a class="reference internal" href="/docs/limit-clause/">LIMIT Clause</a></li>
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- <li class="toctree-l3"><a class="reference internal" href="/docs/offset-clause/">OFFSET Clause</a></li>
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- <li class="toctree-l3"><a class="reference internal" href="/docs/order-by-clause/">ORDER BY Clause</a></li>
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- <li class="toctree-l3"><a class="reference internal" href="/docs/union-set-operator/">UNION Set Operator</a></li>
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- <li class="toctree-l3"><a class="reference internal" href="/docs/where-clause/">WHERE Clause</a></li>
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- <li class="toctree-l3"><a class="reference internal" href="/docs/with-clause/">WITH Clause</a></li>
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- <li class="toctree-l3"><a class="reference internal" href="/docs/show-databases-and-show-schemas/">SHOW DATABASES and SHOW SCHEMAS</a></li>
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- <li class="toctree-l3"><a class="reference internal" href="/docs/show-files/">SHOW FILES</a></li>
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- <li class="toctree-l3"><a class="reference internal" href="/docs/show-tables/">SHOW TABLES</a></li>
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- <li class="toctree-l3"><a class="reference internal" href="/docs/use/">USE</a></li>
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- </ul>
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- <li class="toctree-l2"><a href="javascript: void(0);">SQL Conditional Expressions</a></li>
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- <li class="toctree-l3"><a class="reference internal" href="/docs/case/">CASE</a></li>
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- </ul>
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- <li class="toctree-l2"><a class="reference internal" href="/docs/reserved-keywords/">Reserved Keywords</a></li>
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- <li class="toctree-l2"><a class="reference internal" href="/docs/sql-extensions/">SQL Extensions</a></li>
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- </ul>
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- <li class="toctree-l1"><a href="javascript: void(0);">Data Sources and File Formats</a></li>
- <ul style="display: none">
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- <li class="toctree-l2"><a class="reference internal" href="/docs/data-sources-and-file-formats-introduction/">Data Sources and File Formats Introduction</a></li>
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- <li class="toctree-l2"><a class="reference internal" href="/docs/hive-to-drill-data-type-mapping/">Hive-to-Drill Data Type Mapping</a></li>
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- <h1>MongoDB Plugin for Apache Drill</h1>
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- <h2 id="overview">Overview</h2>
-
-<p>Drill supports MongoDB 3.0, providing a mongodb storage plugin to connect to MongoDB using MongoDB's latest Java driver. You can run queries
-to read, but not write, Mongo data using Drill. Attempting to write data back to Mongo results in an error. You do not need any upfront schema definitions. </p>
-
-<div class="admonition note">
- <p class="first admonition-title">Note</p>
- <p class="last">In the following examples, you use a local instance of Drill for simplicity. </p>
-</div>
-
-<p>You can also run Drill and MongoDB together in distributed mode.</p>
-
-<h3 id="before-you-begin">Before You Begin</h3>
-
-<p>To query MongoDB with Drill, you install Drill and MongoDB, and then you import zip code aggregation data into MongoDB. </p>
-
-<ol>
-<li><a href="/docs/installing-drill-in-embedded-mode">Install Drill</a>, if you do not already have it installed.</li>
-<li><a href="http://docs.mongodb.org/manual/installation">Install MongoDB</a>, if you do not already have it installed.</li>
-<li><a href="http://docs.mongodb.org/manual/tutorial/aggregation-zip-code-data-set">Import the MongoDB zip code sample data set</a>. * Copy the <code>zips.json</code> content into a file and save it.<br>
-
-<ul>
-<li>Create <code>/data/db</code> if it doesn't already exist.</li>
-<li>Make sure you have permissions to access the directories. </li>
-<li>Use Mongo Import to import <code>zips.json</code>. </li>
-</ul></li>
-</ol>
-
-<h2 id="configuring-mongodb">Configuring MongoDB</h2>
-
-<p>Drill must be running in order to access the Web Console to configure a storage plugin configuration. Start Drill and view and enable the MongoDB storage plugin configuration as described in the following procedure: </p>
-
-<ol>
-<li><p><a href="/docs/starting-drill-on-linux-and-mac-os-x/">Start the Drill shell</a>.</p>
-
-<p>The Drill shell needs to be running to access the Drill Web Console.</p></li>
-<li><p>In the <a href="/docs/plugin-configuration-basics/#using-the-drill-web-console">Drill Web Console</a>, select the <strong>Storage</strong> tab.</p></li>
-<li><p>Under Disabled Storage Plugins, select <strong>Update</strong> to choose the <code>mongo</code> storage plugin configuration.</p></li>
-<li><p>In the Configuration window, take a look at the default configuration:</p>
-<div class="highlight"><pre><code class="language-text" data-lang="text">{
- "type": "mongo",
- "connection": "mongodb://localhost:27017/",
- "enabled": false
-}
-</code></pre></div>
-<p><div class="admonition note">
-<p class="first admonition-title">Note</p>
-<p class="last">27017 is the default port for <code>mongodb</code> instances. </p>
-</div> </p></li>
-<li><p>Click <strong>Enable</strong> to enable the storage plugin.</p></li>
-</ol>
-
-<h2 id="querying-mongodb">Querying MongoDB</h2>
-
-<p>In the <a href="/docs/starting-drill-on-linux-and-mac-os-x/">Drill shell</a>, set up Drill to use the zips collection you imported into MongoDB.</p>
-
-<ol>
-<li><p>Get a list of schemas from all
-Drill data sources, including MongoDB. </p>
-<div class="highlight"><pre><code class="language-text" data-lang="text">SHOW DATABASES;
-
-+---------------------+
-| SCHEMA_NAME |
-+---------------------+
-| INFORMATION_SCHEMA |
-| cp.default |
-| dfs.default |
-| dfs.root |
-| dfs.tmp |
-| mongo.local |
-| mongo.test |
-| sys |
-+---------------------+
-8 rows selected (1.385 seconds)
-</code></pre></div></li>
-<li><p>Change the schema to mongo.text.</p>
-<div class="highlight"><pre><code class="language-text" data-lang="text">USE mongo.test;
-
-+-------+-----------------------------------------+
-| ok | summary |
-+-------+-----------------------------------------+
-| true | Default schema changed to [mongo.test] |
-+-------+-----------------------------------------+
-</code></pre></div></li>
-<li><p>List the tables and verify that the <code>zips</code> collection appears:</p>
-<div class="highlight"><pre><code class="language-text" data-lang="text">SHOW TABLES;
-
-+---------------+-----------------+
-| TABLE_SCHEMA | TABLE_NAME |
-+---------------+-----------------+
-| mongo.test | system.indexes |
-| mongo.test | zips |
-+---------------+-----------------+
-2 rows selected (0.187 seconds)
-</code></pre></div></li>
-<li><p>Set the option to read numbers as doubles instead of as text;</p>
-<div class="highlight"><pre><code class="language-text" data-lang="text">ALTER SYSTEM SET `store.mongo.read_numbers_as_double` = true;
-+-------+----------------------------------------------+
-| ok | summary |
-+-------+----------------------------------------------+
-| true | store.mongo.read_numbers_as_double updated. |
-+-------+----------------------------------------------+
-1 row selected (0.078 seconds)
-</code></pre></div></li>
-</ol>
-
-<h3 id="example-queries">Example Queries</h3>
-
-<p><strong>Example 1: View the zips Collection</strong></p>
-<div class="highlight"><pre><code class="language-text" data-lang="text">SELECT * FROM zips LIMIT 10;
-
-+---------------+-------------------------+--------+--------+
-| city | loc | pop | state |
-+---------------+-------------------------+--------+--------+
-| AGAWAM | [-72.622739,42.070206] | 15338 | MA |
-| CUSHMAN | [-72.51565,42.377017] | 36963 | MA |
-| BELCHERTOWN | [-72.410953,42.275103] | 10579 | MA |
-| BLANDFORD | [-72.936114,42.182949] | 1240 | MA |
-| BRIMFIELD | [-72.188455,42.116543] | 3706 | MA |
-| CHESTERFIELD | [-72.833309,42.38167] | 177 | MA |
-| BARRE | [-72.108354,42.409698] | 4546 | MA |
-| CHICOPEE | [-72.607962,42.162046] | 23396 | MA |
-| CHICOPEE | [-72.576142,42.176443] | 31495 | MA |
-| CHESTER | [-72.988761,42.279421] | 1688 | MA |
-+---------------+-------------------------+--------+--------+
-10 rows selected (0.444 seconds)
-</code></pre></div>
-<p><strong>Example 2: Aggregation</strong></p>
-<div class="highlight"><pre><code class="language-text" data-lang="text">SELECT city, avg(pop) FROM zips GROUP BY city LIMIT 10;
-
-+---------------+---------------------+
-| city | EXPR$1 |
-+---------------+---------------------+
-| AGAWAM | 15338.0 |
-| CUSHMAN | 18649.5 |
-| BELCHERTOWN | 10579.0 |
-| BLANDFORD | 1240.0 |
-| BRIMFIELD | 2441.5 |
-| CHESTERFIELD | 9988.857142857143 |
-| BARRE | 9770.0 |
-| CHICOPEE | 27445.5 |
-| CHESTER | 7285.0952380952385 |
-| WESTOVER AFB | 1764.0 |
-+---------------+---------------------+
-10 rows selected (1.664 seconds)
-</code></pre></div>
-<p><strong>Example 3: Nested Data Column Array</strong></p>
-<div class="highlight"><pre><code class="language-text" data-lang="text">0: jdbc:drill:zk=local> SELECT loc FROM zips LIMIT 10;
-+------------------------+
-| loc |
-+------------------------+
-| [-72.622739,42.070206] |
-| [-72.51565,42.377017] |
-| [-72.108354,42.409698] |
-| [-72.410953,42.275103] |
-| [-72.936114,42.182949] |
-| [-72.188455,42.116543] |
-| [-72.988761,42.279421] |
-| [-72.833309,42.38167] |
-| [-72.607962,42.162046] |
-| [-72.576142,42.176443] |
-+------------------------+
-
-0: jdbc:drill:zk=local> SELECT loc[0] FROM zips LIMIT 10;
-+------------+
-| EXPR$0 |
-+------------+
-| -72.622739 |
-| -72.51565 |
-| -72.108354 |
-| -72.410953 |
-| -72.936114 |
-| -72.188455 |
-| -72.988761 |
-| -72.833309 |
-| -72.607962 |
-| -72.576142 |
-+------------+
-</code></pre></div>
-<h2 id="using-odbc/jdbc-drivers">Using ODBC/JDBC Drivers</h2>
-
-<p>You can query MongoDB through standard
-BI tools, such as Tableau and SQuirreL. For information about Drill ODBC and JDBC drivers, refer to <a href="/docs/odbc-jdbc-interfaces">Drill Interfaces</a>.</p>
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- <li class="toctree-l2"><a class="reference internal" href="/docs/drill-query-execution/">Drill Query Execution</a></li>
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- <li class="toctree-l2"><a class="reference internal" href="/docs/core-modules/">Core Modules</a></li>
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- <li class="toctree-l2"><a class="reference internal" href="/docs/performance/">Performance</a></li>
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- </ul>
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- <li class="toctree-l1"><a href="javascript: void(0);">Tutorials</a></li>
- <ul style="display: none">
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- <li class="toctree-l2"><a class="reference internal" href="/docs/tutorials-introduction/">Tutorials Introduction</a></li>
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- <li class="toctree-l2"><a class="reference internal" href="/docs/drill-in-10-minutes/">Drill in 10 Minutes</a></li>
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- <li class="toctree-l2"><a class="reference internal" href="/docs/analyzing-the-yelp-academic-dataset/">Analyzing the Yelp Academic Dataset</a></li>
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- <li class="toctree-l2"><a href="javascript: void(0);">Learn Drill with the MapR Sandbox</a></li>
- <ul style="display: none">
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- <li class="toctree-l3"><a class="reference internal" href="/docs/about-the-mapr-sandbox/">About the MapR Sandbox</a></li>
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- <li class="toctree-l3"><a class="reference internal" href="/docs/installing-the-apache-drill-sandbox/">Installing the Apache Drill Sandbox</a></li>
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- <li class="toctree-l3"><a class="reference internal" href="/docs/getting-to-know-the-drill-sandbox/">Getting to Know the Drill Sandbox</a></li>
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- <li class="toctree-l3"><a class="reference internal" href="/docs/lesson-1-learn-about-the-data-set/">Lesson 1: Learn about the Data Set</a></li>
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- <li class="toctree-l3"><a class="reference internal" href="/docs/lesson-2-run-queries-with-ansi-sql/">Lesson 2: Run Queries with ANSI SQL</a></li>
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- <li class="toctree-l3"><a class="reference internal" href="/docs/lesson-3-run-queries-on-complex-data-types/">Lesson 3: Run Queries on Complex Data Types</a></li>
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- <li class="toctree-l3"><a class="reference internal" href="/docs/summary/">Summary</a></li>
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- </ul>
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- <li class="toctree-l2"><a class="reference internal" href="/docs/analyzing-highly-dynamic-datasets/">Analyzing Highly Dynamic Datasets</a></li>
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- <li class="toctree-l2"><a class="reference internal" href="/docs/analyzing-social-media/">Analyzing Social Media</a></li>
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- </ul>
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- <li class="toctree-l1"><a href="javascript: void(0);">Install Drill</a></li>
- <ul style="display: none">
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- <li class="toctree-l2"><a class="reference internal" href="/docs/install-drill-introduction/">Install Drill Introduction</a></li>
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- <li class="toctree-l2"><a href="javascript: void(0);">Installing Drill in Embedded Mode</a></li>
- <ul style="display: none">
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- <li class="toctree-l3"><a class="reference internal" href="/docs/embedded-mode-prerequisites/">Embedded Mode Prerequisites</a></li>
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- <li class="toctree-l3"><a class="reference internal" href="/docs/installing-drill-on-linux-and-mac-os-x/">Installing Drill on Linux and Mac OS X</a></li>
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- <li class="toctree-l3"><a class="reference internal" href="/docs/starting-drill-on-linux-and-mac-os-x/">Starting Drill on Linux and Mac OS X</a></li>
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- <li class="toctree-l3"><a class="reference internal" href="/docs/installing-drill-on-windows/">Installing Drill on Windows</a></li>
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- <li class="toctree-l3"><a class="reference internal" href="/docs/starting-drill-on-windows/">Starting Drill on Windows</a></li>
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- </ul>
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- <li class="toctree-l2"><a href="javascript: void(0);">Installing Drill in Distributed Mode</a></li>
- <ul style="display: none">
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- <li class="toctree-l3"><a class="reference internal" href="/docs/distributed-mode-prerequisites/">Distributed Mode Prerequisites</a></li>
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- <li class="toctree-l3"><a class="reference internal" href="/docs/installing-drill-on-the-cluster/">Installing Drill on the Cluster</a></li>
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- <li class="toctree-l3"><a class="reference internal" href="/docs/starting-drill-in-distributed-mode/">Starting Drill in Distributed Mode</a></li>
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- </ul>
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- </ul>
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- <li class="toctree-l1"><a href="javascript: void(0);">Configure Drill</a></li>
- <ul style="display: none">
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- <li class="toctree-l2"><a class="reference internal" href="/docs/configure-drill-introduction/">Configure Drill Introduction</a></li>
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- <li class="toctree-l2"><a class="reference internal" href="/docs/configuring-drill-memory/">Configuring Drill Memory</a></li>
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- <li class="toctree-l2"><a href="javascript: void(0);">Configuring a Multitenant Cluster</a></li>
- <ul style="display: none">
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- <li class="toctree-l3"><a class="reference internal" href="/docs/configuring-a-multitenant-cluster-introduction/">Configuring a Multitenant Cluster Introduction</a></li>
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- <li class="toctree-l3"><a class="reference internal" href="/docs/configuring-multitenant-resources/">Configuring Multitenant Resources</a></li>
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- <li class="toctree-l3"><a class="reference internal" href="/docs/configuring-resources-for-a-shared-drillbit/">Configuring Resources for a Shared Drillbit</a></li>
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- </ul>
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- <li class="toctree-l2"><a class="reference internal" href="/docs/configuring-user-impersonation/">Configuring User Impersonation</a></li>
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- <li class="toctree-l2"><a class="reference internal" href="/docs/configuring-user-authentication/">Configuring User Authentication</a></li>
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- <li class="toctree-l2"><a class="reference internal" href="/docs/configuring-user-impersonation-with-hive-authorization/">Configuring User Impersonation with Hive Authorization</a></li>
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- <li class="toctree-l2"><a href="javascript: void(0);">Configuration Options</a></li>
- <ul style="display: none">
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- <li class="toctree-l3"><a class="reference internal" href="/docs/configuration-options-introduction/">Configuration Options Introduction</a></li>
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- <li class="toctree-l3"><a class="reference internal" href="/docs/start-up-options/">Start-Up Options</a></li>
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- <li class="toctree-l3"><a class="reference internal" href="/docs/planning-and-execution-options/">Planning and Execution Options</a></li>
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- <li class="toctree-l3"><a class="reference internal" href="/docs/persistent-configuration-storage/">Persistent Configuration Storage</a></li>
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- </ul>
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- <li class="toctree-l2"><a class="reference internal" href="/docs/ports-used-by-drill/">Ports Used by Drill</a></li>
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- <li class="toctree-l2"><a class="reference internal" href="/docs/configuring-the-drill-shell/">Configuring the Drill Shell</a></li>
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- </ul>
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- <li class="toctree-l1"><a href="javascript: void(0);">Connect a Data Source</a></li>
- <ul style="display: none">
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- <li class="toctree-l2"><a class="reference internal" href="/docs/connect-a-data-source-introduction/">Connect a Data Source Introduction</a></li>
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- <li class="toctree-l2"><a class="reference internal" href="/docs/storage-plugin-registration/">Storage Plugin Registration</a></li>
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- <li class="toctree-l2"><a href="javascript: void(0);">Storage Plugin Configuration</a></li>
- <ul style="display: none">
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- <li class="toctree-l3"><a class="reference internal" href="/docs/plugin-configuration-basics/">Plugin Configuration Basics</a></li>
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- <li class="toctree-l3"><a class="reference internal" href="/docs/file-system-storage-plugin/">File System Storage Plugin</a></li>
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- <li class="toctree-l3"><a class="reference internal" href="/docs/workspaces/">Workspaces</a></li>
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- <li class="toctree-l3"><a class="reference internal" href="/docs/hbase-storage-plugin/">HBase Storage Plugin</a></li>
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- <li class="toctree-l3"><a class="reference internal" href="/docs/hive-storage-plugin/">Hive Storage Plugin</a></li>
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- <li class="toctree-l3"><a class="reference internal" href="/docs/drill-default-input-format/">Drill Default Input Format</a></li>
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- </ul>
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- <li class="toctree-l2"><a class="reference internal" href="/docs/mongodb-plugin-for-apache-drill/">MongoDB Plugin for Apache Drill</a></li>
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- <li class="toctree-l2"><a class="reference internal" href="/docs/mapr-db-format/">MapR-DB Format</a></li>
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- </ul>
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- <li class="toctree-l1"><a href="javascript: void(0);">ODBC/JDBC Interfaces</a></li>
- <ul style="display: none">
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- <li class="toctree-l2"><a class="reference internal" href="/docs/interfaces-introduction/">Interfaces Introduction</a></li>
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- <li class="toctree-l2"><a class="reference internal" href="/docs/using-the-jdbc-driver/">Using the JDBC Driver</a></li>
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- <li class="toctree-l2"><a class="reference internal" href="/docs/using-jdbc-with-squirrel-on-windows/">Using JDBC with SQuirreL on Windows</a></li>
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- <li class="toctree-l2"><a href="javascript: void(0);">Installing the ODBC Driver</a></li>
- <ul style="display: none">
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- <li class="toctree-l3"><a class="reference internal" href="/docs/installing-the-driver-on-linux/">Installing the Driver on Linux</a></li>
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- <li class="toctree-l3"><a class="reference internal" href="/docs/installing-the-driver-on-mac-os-x/">Installing the Driver on Mac OS X</a></li>
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- <li class="toctree-l3"><a class="reference internal" href="/docs/installing-the-driver-on-windows/">Installing the Driver on Windows</a></li>
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- <li class="toctree-l3"><a class="reference internal" href="/docs/installing-the-tdc-file-on-windows/">Installing the TDC File on Windows</a></li>
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- </ul>
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- <li class="toctree-l2"><a href="javascript: void(0);">Configuring ODBC</a></li>
- <ul style="display: none">
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- <li class="toctree-l3"><a class="reference internal" href="/docs/odbc-configuration-reference/">ODBC Configuration Reference</a></li>
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- <li class="toctree-l3"><a class="reference internal" href="/docs/configuring-odbc-on-linux/">Configuring ODBC on Linux</a></li>
-
- <li class="toctree-l3"><a class="reference internal" href="/docs/configuring-odbc-on-mac-os-x/">Configuring ODBC on Mac OS X</a></li>
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- <li class="toctree-l3"><a class="reference internal" href="/docs/configuring-odbc-on-windows/">Configuring ODBC on Windows</a></li>
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- <li class="toctree-l3"><a class="reference internal" href="/docs/testing-the-odbc-connection/">Testing the ODBC Connection</a></li>
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- </ul>
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- <li class="toctree-l2"><a href="javascript: void(0);">Using Drill Explorer</a></li>
- <ul style="display: none">
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- <li class="toctree-l3"><a class="reference internal" href="/docs/drill-explorer-introduction/">Drill Explorer Introduction</a></li>
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- <li class="toctree-l3"><a class="reference internal" href="/docs/connecting-drill-explorer-to-data/">Connecting Drill Explorer to Data</a></li>
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- <li class="toctree-l3"><a class="reference internal" href="/docs/browsing-data-and-defining-views/">Browsing Data and Defining Views</a></li>
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- </ul>
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- <li class="toctree-l2"><a href="javascript: void(0);">Using Drill with BI Tools</a></li>
- <ul style="display: none">
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- <li class="toctree-l3"><a class="reference internal" href="/docs/using-drill-with-bi-tools-introduction/">Using Drill with BI Tools Introduction</a></li>
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- <li class="toctree-l3"><a class="reference internal" href="/docs/tableau-examples/">Tableau Examples</a></li>
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- <li class="toctree-l3"><a class="reference internal" href="/docs/using-microstrategy-analytics-with-apache-drill/">Using MicroStrategy Analytics with Apache Drill</a></li>
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- <li class="toctree-l3"><a class="reference internal" href="/docs/using-tibco-spotfire-desktop-with-drill/">Using Tibco Spotfire Desktop with Drill</a></li>
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- <li class="toctree-l3"><a class="reference internal" href="/docs/configuring-tibco-spotfire-server-with-drill/">Configuring Tibco Spotfire Server with Drill</a></li>
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- <li class="toctree-l3"><a class="reference internal" href="/docs/using-apache-drill-with-tableau-9-desktop/">Using Apache Drill with Tableau 9 Desktop</a></li>
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- <li class="toctree-l3"><a class="reference internal" href="/docs/using-apache-drill-with-tableau-9-server/">Using Apache Drill with Tableau 9 Server</a></li>
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- <li class="toctree-l3"><a class="reference internal" href="/docs/configuring-jreport-with-drill/">Configuring JReport with Drill</a></li>
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- </ul>
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- </ul>
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- <li class="toctree-l1"><a href="javascript: void(0);">Query Data</a></li>
- <ul style="display: none">
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- <li class="toctree-l2"><a class="reference internal" href="/docs/query-data-introduction/">Query Data Introduction</a></li>
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- <li class="toctree-l2"><a href="javascript: void(0);">Querying a File System</a></li>
- <ul style="display: none">
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- <li class="toctree-l3"><a class="reference internal" href="/docs/querying-a-file-system-introduction/">Querying a File System Introduction</a></li>
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- <li class="toctree-l3"><a class="reference internal" href="/docs/querying-json-files/">Querying JSON Files</a></li>
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- <li class="toctree-l3"><a class="reference internal" href="/docs/querying-parquet-files/">Querying Parquet Files</a></li>
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- <li class="toctree-l3"><a class="reference internal" href="/docs/querying-plain-text-files/">Querying Plain Text Files</a></li>
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- <li class="toctree-l3"><a class="reference internal" href="/docs/querying-directories/">Querying Directories</a></li>
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- </ul>
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- <li class="toctree-l2"><a class="reference internal" href="/docs/querying-hbase/">Querying HBase</a></li>
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- <li class="toctree-l2"><a href="javascript: void(0);">Querying Complex Data</a></li>
- <ul style="display: none">
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- <li class="toctree-l3"><a class="reference internal" href="/docs/querying-complex-data-introduction/">Querying Complex Data Introduction</a></li>
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- <li class="toctree-l3"><a class="reference internal" href="/docs/sample-data-donuts/">Sample Data: Donuts</a></li>
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- <li class="toctree-l3"><a class="reference internal" href="/docs/selecting-flat-data/">Selecting Flat Data</a></li>
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- <li class="toctree-l3"><a class="reference internal" href="/docs/using-sql-functions-clauses-and-joins/">Using SQL Functions, Clauses, and Joins</a></li>
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- <li class="toctree-l3"><a class="reference internal" href="/docs/selecting-nested-data-for-a-column/">Selecting Nested Data for a Column</a></li>
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- <li class="toctree-l3"><a class="reference internal" href="/docs/selecting-multiple-columns-within-nested-data/">Selecting Multiple Columns Within Nested Data</a></li>
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- </ul>
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- <li class="toctree-l2"><a class="reference internal" href="/docs/querying-hive/">Querying Hive</a></li>
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- <li class="toctree-l2"><a class="reference internal" href="/docs/querying-the-information-schema/">Querying the INFORMATION SCHEMA</a></li>
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- <li class="toctree-l2"><a class="reference internal" href="/docs/querying-system-tables/">Querying System Tables</a></li>
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- <li class="toctree-l2"><a class="reference internal" href="/docs/monitoring-and-canceling-queries-in-the-drill-web-ui/">Monitoring and Canceling Queries in the Drill Web UI</a></li>
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- </ul>
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- <li class="toctree-l1"><a href="javascript: void(0);">Performance Tuning</a></li>
- <ul style="display: none">
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- <li class="toctree-l2"><a class="reference internal" href="/docs/performance-tuning-introduction/">Performance Tuning Introduction</a></li>
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- <li class="toctree-l2"><a class="reference internal" href="/docs/partition-pruning/">Partition Pruning</a></li>
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- <li class="toctree-l2"><a class="reference internal" href="/docs/choosing-a-storage-format/">Choosing a Storage Format</a></li>
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- <li class="toctree-l2"><a href="javascript: void(0);">Query Plans and Tuning</a></li>
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- <li class="toctree-l3"><a class="reference internal" href="/docs/query-plans-and-tuning-introduction/">Query Plans and Tuning Introduction</a></li>
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- <li class="toctree-l3"><a class="reference internal" href="/docs/join-planning-guidelines/">Join Planning Guidelines</a></li>
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- <li class="toctree-l3"><a class="reference internal" href="/docs/guidelines-for-optimizing-aggregation/">Guidelines for Optimizing Aggregation</a></li>
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- <li class="toctree-l3"><a class="reference internal" href="/docs/modifying-query-planning-options/">Modifying Query Planning Options</a></li>
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- <li class="toctree-l3"><a class="reference internal" href="/docs/sort-based-and-hash-based-memory-constrained-operators/">Sort-Based and Hash-Based Memory-Constrained Operators</a></li>
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- <li class="toctree-l3"><a class="reference internal" href="/docs/enabling-query-queuing/">Enabling Query Queuing</a></li>
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- <li class="toctree-l3"><a class="reference internal" href="/docs/controlling-parallelization-to-balance-performance-with-multi-tenancy/">Controlling Parallelization to Balance Performance with Multi-Tenancy</a></li>
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- </ul>
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- <li class="toctree-l2"><a href="javascript: void(0);">Identifying Performance Issues</a></li>
- <ul style="display: none">
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- <li class="toctree-l3"><a class="reference internal" href="/docs/query-plans/">Query Plans</a></li>
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- <li class="toctree-l3"><a class="reference internal" href="/docs/query-profiles/">Query Profiles</a></li>
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- <li class="toctree-l2"><a href="javascript: void(0);">Performance Tuning Reference</a></li>
- <ul style="display: none">
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- <li class="toctree-l3"><a class="reference internal" href="/docs/query-profile-column-descriptions/">Query Profile Column Descriptions</a></li>
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- <li class="toctree-l3"><a class="reference internal" href="/docs/physical-operators/">Physical Operators</a></li>
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- </ul>
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- <li class="toctree-l2"><a class="reference internal" href="/docs/log-and-debug-introduction/">Log and Debug Introduction</a></li>
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- <li class="toctree-l2"><a class="reference internal" href="/docs/error-messages/">Error Messages</a></li>
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- <li class="toctree-l2"><a class="reference internal" href="/docs/modify-logback-xml/">Modify logback.xml</a></li>
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- <li class="toctree-l2"><a class="reference internal" href="/docs/review-the-java-stack-trace/">Review the Java Stack Trace</a></li>
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- <li class="toctree-l2"><a class="reference internal" href="/docs/query-audit-logging/">Query Audit Logging</a></li>
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- <li class="toctree-l1"><a href="javascript: void(0);">SQL Reference</a></li>
- <ul style="display: none">
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- <li class="toctree-l2"><a class="reference internal" href="/docs/sql-reference-introduction/">SQL Reference Introduction</a></li>
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- <ul style="display: none">
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- <li class="toctree-l3"><a class="reference internal" href="/docs/supported-data-types/">Supported Data Types</a></li>
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- <li class="toctree-l3"><a class="reference internal" href="/docs/date-time-and-timestamp/">Date, Time, and Timestamp</a></li>
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- <li class="toctree-l3"><a class="reference internal" href="/docs/handling-different-data-types/">Handling Different Data Types</a></li>
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- </ul>
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- <li class="toctree-l2"><a class="reference internal" href="/docs/lexical-structure/">Lexical Structure</a></li>
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- <li class="toctree-l2"><a class="reference internal" href="/docs/operators/">Operators</a></li>
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- <li class="toctree-l3"><a class="reference internal" href="/docs/about-sql-function-examples/">About SQL Function Examples</a></li>
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- <li class="toctree-l3"><a class="reference internal" href="/docs/math-and-trig/">Math and Trig</a></li>
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- <li class="toctree-l3"><a class="reference internal" href="/docs/data-type-conversion/">Data Type Conversion</a></li>
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- <li class="toctree-l3"><a class="reference internal" href="/docs/date-time-functions-and-arithmetic/">Date/Time Functions and Arithmetic</a></li>
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- <li class="toctree-l3"><a class="reference internal" href="/docs/string-manipulation/">String Manipulation</a></li>
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- <li class="toctree-l3"><a class="reference internal" href="/docs/aggregate-and-aggregate-statistical/">Aggregate and Aggregate Statistical</a></li>
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- <li class="toctree-l3"><a class="reference internal" href="/docs/functions-for-handling-nulls/">Functions for Handling Nulls</a></li>
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- <li class="toctree-l2"><a href="javascript: void(0);">SQL Window Functions</a></li>
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- <li class="toctree-l3"><a class="reference internal" href="/docs/sql-window-functions-introduction/">SQL Window Functions Introduction</a></li>
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- <li class="toctree-l3"><a class="reference internal" href="/docs/aggregate-window-functions/">Aggregate Window Functions</a></li>
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- <li class="toctree-l3"><a class="reference internal" href="/docs/ranking-window-functions/">Ranking Window Functions</a></li>
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- <li class="toctree-l3"><a class="reference internal" href="/docs/sql-window-functions-examples/">SQL Window Functions Examples</a></li>
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- <li class="toctree-l3"><a class="reference internal" href="/docs/nested-data-limitations/">Nested Data Limitations</a></li>
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- <li class="toctree-l3"><a class="reference internal" href="/docs/flatten/">FLATTEN</a></li>
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- <li class="toctree-l3"><a class="reference internal" href="/docs/kvgen/">KVGEN</a></li>
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- <li class="toctree-l3"><a class="reference internal" href="/docs/repeated-count/">REPEATED_COUNT</a></li>
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- <li class="toctree-l3"><a class="reference internal" href="/docs/repeated-contains/">REPEATED_CONTAINS</a></li>
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- </ul>
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- <li class="toctree-l2"><a class="reference internal" href="/docs/query-directory-functions/">Query Directory Functions</a></li>
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- <ul style="display: none">
-
- <li class="toctree-l3"><a class="reference internal" href="/docs/supported-sql-commands/">Supported SQL Commands</a></li>
-
- <li class="toctree-l3"><a class="reference internal" href="/docs/alter-session/">ALTER SESSION</a></li>
-
- <li class="toctree-l3"><a class="reference internal" href="/docs/alter-system/">ALTER SYSTEM</a></li>
-
- <li class="toctree-l3"><a class="reference internal" href="/docs/create-table-as-ctas/">CREATE TABLE AS (CTAS)</a></li>
-
- <li class="toctree-l3"><a class="reference internal" href="/docs/partition-by-clause/">PARTITION BY Clause</a></li>
-
- <li class="toctree-l3"><a class="reference internal" href="/docs/create-view/">CREATE VIEW</a></li>
-
- <li class="toctree-l3"><a class="reference internal" href="/docs/drop-view/">DROP VIEW</a></li>
-
- <li class="toctree-l3"><a class="reference internal" href="/docs/describe/">DESCRIBE</a></li>
-
- <li class="toctree-l3"><a class="reference internal" href="/docs/explain/">EXPLAIN</a></li>
-
- <li class="toctree-l3"><a class="reference internal" href="/docs/select/">SELECT</a></li>
-
- <li class="toctree-l3"><a class="reference internal" href="/docs/select-list/">SELECT List</a></li>
-
- <li class="toctree-l3"><a class="reference internal" href="/docs/from-clause/">FROM Clause</a></li>
-
- <li class="toctree-l3"><a class="reference internal" href="/docs/group-by-clause/">GROUP BY Clause</a></li>
-
- <li class="toctree-l3"><a class="reference internal" href="/docs/having-clause/">HAVING Clause</a></li>
-
- <li class="toctree-l3"><a class="reference internal" href="/docs/limit-clause/">LIMIT Clause</a></li>
-
- <li class="toctree-l3"><a class="reference internal" href="/docs/offset-clause/">OFFSET Clause</a></li>
-
- <li class="toctree-l3"><a class="reference internal" href="/docs/order-by-clause/">ORDER BY Clause</a></li>
-
- <li class="toctree-l3"><a class="reference internal" href="/docs/union-set-operator/">UNION Set Operator</a></li>
-
- <li class="toctree-l3"><a class="reference internal" href="/docs/where-clause/">WHERE Clause</a></li>
-
- <li class="toctree-l3"><a class="reference internal" href="/docs/with-clause/">WITH Clause</a></li>
-
- <li class="toctree-l3"><a class="reference internal" href="/docs/show-databases-and-show-schemas/">SHOW DATABASES and SHOW SCHEMAS</a></li>
-
- <li class="toctree-l3"><a class="reference internal" href="/docs/show-files/">SHOW FILES</a></li>
-
- <li class="toctree-l3"><a class="reference internal" href="/docs/show-tables/">SHOW TABLES</a></li>
-
- <li class="toctree-l3"><a class="reference internal" href="/docs/use/">USE</a></li>
-
- </ul>
-
-
-
- <li class="toctree-l2"><a href="javascript: void(0);">SQL Conditional Expressions</a></li>
- <ul style="display: none">
-
- <li class="toctree-l3"><a class="reference internal" href="/docs/case/">CASE</a></li>
-
- </ul>
-
-
-
- <li class="toctree-l2"><a class="reference internal" href="/docs/reserved-keywords/">Reserved Keywords</a></li>
-
-
-
- <li class="toctree-l2"><a class="reference internal" href="/docs/sql-extensions/">SQL Extensions</a></li>
-
-
- </ul>
-
-
-
- <li class="toctree-l1"><a href="javascript: void(0);">Data Sources and File Formats</a></li>
- <ul style="display: none">
-
-
- <li class="toctree-l2"><a class="reference internal" href="/docs/data-sources-and-file-formats-introduction/">Data Sources and File Formats Introduction</a></li>
-
-
-
- <li class="toctree-l2"><a class="reference internal" href="/docs/hive-to-drill-data-type-mapping/">Hive-to-Drill Data Type Mapping</a></li>
-
-
-
- <li class="toctree-l2"><a class="reference internal" href="/docs/deploying-and-using-a-hive-udf/">Deploying and Using a Hive UDF</a></li>
-
-
-
- <li class="toctree-l2"><a class="reference internal" href="/docs/parquet-format/">Parquet Format</a></li>
-
-
-
- <li class="toctree-l2"><a class="reference internal" href="/docs/json-data-model/">JSON Data Model</a></li>
-
-
-
- <li class="toctree-l2"><a class="reference internal" href="/docs/text-files-csv-tsv-psv/">Text Files: CSV, TSV, PSV</a></li>
-
-
- </ul>
-
-
-
- <li class="toctree-l1"><a href="javascript: void(0);">Develop Custom Functions</a></li>
- <ul style="display: none">
-
-
- <li class="toctree-l2"><a class="reference internal" href="/docs/develop-custom-functions-introduction/">Develop Custom Functions Introduction</a></li>
-
-
-
- <li class="toctree-l2"><a class="reference internal" href="/docs/developing-a-simple-function/">Developing a Simple Function</a></li>
-
-
-
- <li class="toctree-l2"><a class="reference internal" href="/docs/tutorial-develop-a-simple-function/">Tutorial: Develop a Simple Function</a></li>
-
-
-
- <li class="toctree-l2"><a class="reference internal" href="/docs/developing-an-aggregate-function/">Developing an Aggregate Function</a></li>
-
-
-
- <li class="toctree-l2"><a class="reference internal" href="/docs/adding-custom-functions-to-drill/">Adding Custom Functions to Drill</a></li>
-
-
-
- <li class="toctree-l2"><a class="reference internal" href="/docs/using-custom-functions-in-queries/">Using Custom Functions in Queries</a></li>
-
-
-
- <li class="toctree-l2"><a class="reference internal" href="/docs/custom-function-interfaces/">Custom Function Interfaces</a></li>
-
-
- </ul>
-
-
-
- <li class="toctree-l1"><a class="reference internal" href="/docs/troubleshooting/">Troubleshooting</a></li>
-
-
-
- <li class="toctree-l1"><a href="javascript: void(0);">Developer Information</a></li>
- <ul style="display: none">
-
-
- <li class="toctree-l2"><a href="javascript: void(0);">Develop Drill</a></li>
- <ul style="display: none">
-
- <li class="toctree-l3"><a class="reference internal" href="/docs/compiling-drill-from-source/">Compiling Drill from Source</a></li>
-
- <li class="toctree-l3"><a class="reference internal" href="/docs/drill-patch-review-tool/">Drill Patch Review Tool</a></li>
-
- </ul>
-
-
-
- <li class="toctree-l2"><a href="javascript: void(0);">Contribute to Drill</a></li>
- <ul style="display: none">
-
- <li class="toctree-l3"><a class="reference internal" href="/docs/apache-drill-contribution-guidelines/">Apache Drill Contribution Guidelines</a></li>
-
- <li class="toctree-l3"><a class="reference internal" href="/docs/apache-drill-contribution-ideas/">Apache Drill Contribution Ideas</a></li>
-
- </ul>
-
-
-
- <li class="toctree-l2"><a href="javascript: void(0);">Design Docs</a></li>
- <ul style="display: none">
-
- <li class="toctree-l3"><a class="reference internal" href="/docs/drill-plan-syntax/">Drill Plan Syntax</a></li>
-
- <li class="toctree-l3"><a class="reference internal" href="/docs/rpc-overview/">RPC Overview</a></li>
-
- <li class="toctree-l3"><a class="reference internal" href="/docs/query-stages/">Query Stages</a></li>
-
- <li class="toctree-l3"><a class="reference internal" href="/docs/useful-research/">Useful Research</a></li>
-
- <li class="toctree-l3"><a class="reference internal" href="/docs/value-vectors/">Value Vectors</a></li>
-
- </ul>
-
-
- </ul>
-
-
-
- <li class="toctree-l1"><a href="javascript: void(0);">Release Notes</a></li>
- <ul style="display: none">
-
-
- <li class="toctree-l2"><a class="reference internal" href="/docs/apache-drill-1-1-0-release-notes/">Apache Drill 1.1.0 Release Notes</a></li>
-
-
-
- <li class="toctree-l2"><a class="reference internal" href="/docs/apache-drill-1-0-0-release-notes/">Apache Drill 1.0.0 Release Notes</a></li>
-
-
-
- <li class="toctree-l2"><a class="reference internal" href="/docs/apache-drill-0-9-0-release-notes/">Apache Drill 0.9.0 Release Notes</a></li>
-
-
-
- <li class="toctree-l2"><a class="reference internal" href="/docs/apache-drill-0-8-0-release-notes/">Apache Drill 0.8.0 Release Notes</a></li>
-
-
-
- <li class="toctree-l2"><a class="reference internal" href="/docs/apache-drill-0-7-0-release-notes/">Apache Drill 0.7.0 Release Notes</a></li>
-
-
-
- <li class="toctree-l2"><a class="reference internal" href="/docs/apache-drill-0-6-0-release-notes/">Apache Drill 0.6.0 Release Notes</a></li>
-
-
-
- <li class="toctree-l2"><a class="reference internal" href="/docs/apache-drill-m1-release-notes-apache-drill-alpha/">Apache Drill M1 Release Notes (Apache Drill Alpha)</a></li>
-
-
-
- <li class="toctree-l2"><a class="reference internal" href="/docs/apache-drill-m1-release-notes-apache-drill-alpha/">Apache Drill M1 Release Notes (Apache Drill Alpha)</a></li>
-
-
-
- <li class="toctree-l2"><a class="reference internal" href="/docs/apache-drill-0-5-0-release-notes/">Apache Drill 0.5.0 Release Notes</a></li>
-
-
-
- <li class="toctree-l2"><a class="reference internal" href="/docs/apache-drill-0-4-0-release-notes/">Apache Drill 0.4.0 Release Notes</a></li>
-
-
- </ul>
-
-
-
- <li class="toctree-l1"><a href="javascript: void(0);">Sample Datasets</a></li>
- <ul style="display: none">
-
-
- <li class="toctree-l2"><a class="reference internal" href="/docs/aol-search/">AOL Search</a></li>
-
-
-
- <li class="toctree-l2"><a class="reference internal" href="/docs/enron-emails/">Enron Emails</a></li>
-
-
-
- <li class="toctree-l2"><a class="reference internal" href="/docs/wikipedia-edit-history/">Wikipedia Edit History</a></li>
-
-
- </ul>
-
-
-
- <li class="toctree-l1 current_section "><a href="javascript: void(0);">Archived Pages</a></li>
- <ul class="current_section">
-
-
- <li class="toctree-l2 current"><a class="reference internal" href="/docs/how-to-run-the-drill-demo/">How to Run the Drill Demo</a></li>
-
-
-
- <li class="toctree-l2"><a class="reference internal" href="/docs/what-is-apache-drill/">What is Apache Drill</a></li>
-
-
- </ul>
-
-
-
- <li class="toctree-l1"><a href="javascript: void(0);">Progress Reports</a></li>
- <ul style="display: none">
-
-
- <li class="toctree-l2"><a class="reference internal" href="/docs/2014-q1-drill-report/">2014 Q1 Drill Report</a></li>
-
-
- </ul>
-
-
-
- <li class="toctree-l1"><a class="reference internal" href="/docs/project-bylaws/">Project Bylaws</a></li>
-
-
- </ul>
-
- </div>
- </div>
-</aside>
-
-
-<nav class="breadcrumbs">
- <li><a href="/docs/">Docs</a></li>
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- <li><a href="/docs/archived-pages/">Archived Pages</a></li>
-
- <li>How to Run the Drill Demo</li>
-</nav>
-
-<div class="main-content-wrapper">
- <div class="main-content">
-
-
- <a class="edit-link" href="https://github.com/apache/drill/blob/gh-pages/_docs/archived-pages/010-how-to-run-the-drill-demo.md" target="_blank"><i class="fa fa-pencil-square-o"></i></a>
-
-
- <div class="int_title left">
- <h1>How to Run the Drill Demo</h1>
-
- </div>
-
- <link href="/css/docpage.css" rel="stylesheet" type="text/css">
-
- <div class="int_text" align="left">
-
- <p>This section describes how to get started by running the Drill demo.</p>
-
-<h2 id="pre-requisites">Pre-requisites</h2>
-
-<ul>
-<li><p>Maven 2 or higher</p>
-
-<p>On Ubuntu, you can do this as root:</p>
-<div class="highlight"><pre><code class="language-text" data-lang="text">apt-get install maven2
-</code></pre></div>
-<p>On the Mac, maven is pre-installed.</p>
-
-<p>Note that installing maven can result in installing java 1.6 and setting that
-to your default version. Make sure you check java version before compiling or
-running.</p></li>
-<li><p>Java 1.7</p>
-
-<p>You will need java 1.7 to compile and run the Drill demo.</p>
-
-<p>On Ubuntu you can get the right version of Java by doing this as root:</p>
-<div class="highlight"><pre><code class="language-text" data-lang="text">apt-get install openjdk-7-jdk
-sudo update-alternatives --set java $(update-alternatives --list java | grep 7 | head -1)
-</code></pre></div>
-<p>On a Mac, go to <a href="http://www.oracle.com/technetwork/java/javase/downloads/java-se-%0Ajdk-7-download-432154.html">Oracle's web-
-site</a> to download and install java 7. You will also need
-to set JAVA_HOME in order to use the right version of java.</p>
-
-<p>Drill will not compile correctly using java 6. There is also a subtle problem
-that can occur if you have both<br>
-java 6 and java 7 with the default version set to 6. In that case, you may be
-able to compile, but execution may not work correctly.</p>
-
-<p>Send email to the dev list if this is a problem for you.</p></li>
-<li><p>Protobuf</p>
-
-<p>Drill requires Protobuf 2.5. Install this on Ubuntu using:</p>
-<div class="highlight"><pre><code class="language-text" data-lang="text">apt-get install protobuf-compiler
-</code></pre></div>
-<p>On Centos 6.4, OEL or RHEL you will need to compile protobuf-compiler:</p>
-<div class="highlight"><pre><code class="language-text" data-lang="text">wget http://protobuf.googlecode.com/files/protobuf-2.5.0.tar.bz2
-tar xfj protobuf-2.5.0.tar.bz2
-pushd protobuf-2.5.0
-./configure
-make
-sudo make install
-</code></pre></div></li>
-<li><p>git</p>
-
-<p>On Ubuntu you can install git by doing this as root:</p>
-<div class="highlight"><pre><code class="language-text" data-lang="text">apt-get install git-all
-</code></pre></div></li>
-</ul>
-
-<p>On the Mac or Windows, go to <a href="http://git-scm.com/downloads">this site</a> to
-download and install git.</p>
-
-<h2 id="check-your-installation-versions">Check your installation versions</h2>
-
-<p>Run</p>
-<div class="highlight"><pre><code class="language-text" data-lang="text">java -version
-mvn -version
-</code></pre></div>
-<p>Verify that your default java and maven versions are correct, and that maven
-runs the right version of java. On my Mac, you see something like this:</p>
-<div class="highlight"><pre><code class="language-text" data-lang="text">ted:apache-drill-1.0.0-m1$ java -version
-java version "1.7.0_11"
-Java(TM) SE Runtime Environment (build 1.7.0_11-b21)
-Java HotSpot(TM) 64-Bit Server VM (build 23.6-b04, mixed mode)
-ted:apache-drill-1.0.0-m1$ mvn -version
-Apache Maven 3.0.3 (r1075438; 2011-02-28 09:31:09-0800)
-Maven home: /usr/share/maven
-Java version: 1.7.0_11, vendor: Oracle Corporation
-Java home: /Library/Java/JavaVirtualMachines/jdk1.7.0_11.jdk/Contents/Home/jre
-Default locale: en_US, platform encoding: UTF-8
-OS name: "mac os x", version: "10.7.5", arch: "x86_64", family: "mac"
-ted:apache-drill-1.0.0-m1$
-</code></pre></div>
-<h2 id="get-the-source">Get the Source</h2>
-<div class="highlight"><pre><code class="language-text" data-lang="text">git clone https://git-wip-us.apache.org/repos/asf/incubator-drill.git
-</code></pre></div>
-<h2 id="compile-the-code">Compile the Code</h2>
-<div class="highlight"><pre><code class="language-text" data-lang="text">cd incubator-drill/sandbox/prototype
-mvn clean install -DskipTests
-rm .classpath
-</code></pre></div>
-<p>This takes about a minute on a not-terribly-current MacBook.</p>
-
-<h2 id="run-the-interactive-drill-shell">Run the interactive Drill shell</h2>
-<div class="highlight"><pre><code class="language-text" data-lang="text">./sqlline -u jdbc:drill:schema=parquet-local -n admin -p admin
-</code></pre></div>
-<p>The first time you run this program, you will get reams of output. What is
-happening is that the program is running maven in order to build a
-(voluminous) class path for the actual program and stores this classpath into
-the file called <code>.classpath</code>. When you run this program again, it will note
-that this file already exists and avoid re-creating it. You should delete this
-file every time the dependencies of Drill are changed. If you start getting
-"class not found" errors, that is a good hint that <code>.classpath</code> is out of date
-and needs to be deleted and recreated.</p>
-
-<p>The <code>-u</code> argument to <a href="https://github.com/julianhyde/sqlline">sqlline</a> is a
-JDBC connection string that directs sqlline to connect to drill. The Drill
-JDBC driver currently includes enough smarts to run Drill in embedded mode so
-this command also effectively starts a local drill bit. The <code>schema=</code> part of
-the JDBC connection string causes Drill to consider the "parquet-local"
-storage engine to be default. Other storage engines can be specified. The list
-of supported storage engines can be found in the file
-<code>./sqlparser/src/main/resources/storage-engines.json</code>. Each storage engine
-specifies the format of the data and how to get the data. See the section
-below on "Storage Engines" for more detail.</p>
-
-<p>When you run sqlline, you should see something like this after quite a lot of
-log messages:</p>
-<div class="highlight"><pre><code class="language-text" data-lang="text">Connected to: Drill (version 1.0)
-Driver: Apache Drill JDBC Driver (version 1.0)
-Autocommit status: true
-Transaction isolation: TRANSACTION_REPEATABLE_READ
-sqlline version ??? by Marc Prud'hommeaux
-0: jdbc:drill:schema=parquet-local>
-</code></pre></div>
-<p><strong>Tip:</strong> To quit sqlline at any time, type "!quit" at the prompt.</p>
-<div class="highlight"><pre><code class="language-text" data-lang="text">0: jdbc:drill:schema=parquet-local> !quit
-</code></pre></div>
-<h2 id="run-a-query">Run a Query</h2>
-
-<p>Once you have sqlline running you can now try out some queries:</p>
-<div class="highlight"><pre><code class="language-text" data-lang="text">select * from "sample-data/region.parquet";
-</code></pre></div>
-<p>You should see a number of debug messages and then something like this:</p>
-<div class="highlight"><pre><code class="language-text" data-lang="text">+--------------------------------------------------------------------------------------------------------------------------------------------+
-| _MAP |
-+--------------------------------------------------------------------------------------------------------------------------------------------+
-| {"R_REGIONKEY":0,"R_NAME":"AFRICA","R_COMMENT":"lar deposits. blithely final packages cajole. regular waters are final requests. regular a |
-| {"R_REGIONKEY":1,"R_NAME":"AMERICA","R_COMMENT":"hs use ironic, even requests. s"} |
-| {"R_REGIONKEY":2,"R_NAME":"ASIA","R_COMMENT":"ges. thinly even pinto beans ca"} |
-| {"R_REGIONKEY":3,"R_NAME":"EUROPE","R_COMMENT":"ly final courts cajole furiously final excuse"} |
-| {"R_REGIONKEY":4,"R_NAME":"MIDDLE EAST","R_COMMENT":"uickly special accounts cajole carefully blithely close requests. carefully final asy |
-+--------------------------------------------------------------------------------------------------------------------------------------------+
-5 rows selected (1.103 seconds)
-</code></pre></div>
-<p>Drill has no idea what the structure of this
-file is in terms of what fields exist, but Drill does know that every record
-has a pseudo-field called <code>_MAP</code>. This field contains a map of all of the
-actual fields to values. When returned via JDBC, this fields is rendered as
-JSON since JDBC doesn't really understand maps.</p>
-
-<p>This can be made more readable by using a query like this:</p>
-<div class="highlight"><pre><code class="language-text" data-lang="text">select _MAP['R_REGIONKEY'] as region_key, _MAP['R_NAME'] as name, _MAP['R_COMMENT'] as comment
-from "sample-data/region.parquet";
-</code></pre></div>
-<p>The output will look something like this:</p>
-<div class="highlight"><pre><code class="language-text" data-lang="text">+-------------+--------------+---------------------------------------------------------------------------------------------------------------+
-| REGION_KEY | NAME | COMMENT |
-+-------------+--------------+---------------------------------------------------------------------------------------------------------------+
-| 0 | AFRICA | lar deposits. blithely final packages cajole. regular waters are final requests. regular accounts are accordi |
-| 1 | AMERICA | hs use ironic, even requests. s |
-| 2 | ASIA | ges. thinly even pinto beans ca |
-| 3 | EUROPE | ly final courts cajole furiously final excuse |
-| 4 | MIDDLE EAST | uickly special accounts cajole carefully blithely close requests. carefully final asymptotes haggle furiousl |
-+-------------+--------------+---------------------------------------------------------------------------------------------------------------+
-</code></pre></div>
-<p>In upcoming versions, Drill will insert the <code>_MAP[ ... ]</code> goo and will also
-unwrap the contents of <code>_MAP</code> in results so that things seem much more like
-ordinary SQL. The reason that things work this way now is that SQL itself
-requires considerable type information for queries to be parsed and that
-information doesn't necessarily exist for all kinds of files, especially those
-with very flexible schemas. To avoid all these problems, Drill adopts the
-convention of the _MAP fields for all kinds of input.</p>
-
-<h2 id="a-note-before-you-continue">A Note Before You Continue</h2>
-
-<p>Drill currently supports a wide variety of queries. It currently also has a
-fair number of deficiencies in terms of the number of operators that are
-actually supported and exactly which expressions are passed through to the
-execution engine in the correct form for execution.</p>
-
-<p>These problems fall into roughly three categories,</p>
-
-<ul>
-<li><p>missing operators. Many operators have been implemented for only a subset of the types available in Drill. This will cause queries to work for some types of data, but not for others. This is particularly true for operators with many possible type signatures such as comparisons. This lack is being remedied at a fast pace so check back in frequently if you suspect this might be a problem.</p>
-
-<p>Missing operators will result in error messages like this:</p>
-
-<p><code>UnsupportedOperationException:[ Missing function implementation: compare_to
-(BIT-OPTIONAL, BIT-OPTIONAL) ]</code></p></li>
-<li><p>missing casts. The SQL parser currently has trouble producing a valid logical plan without sufficient type information. Ironically, this type information is often not necessary to the execution engine because Drill generates the code on the fly based on the types of the data it encounters as data are processed. Currently, the work-around is to cast fields in certain situations to give the parser enough information to proceed. This problem will be remedied soon, but probably not quite as quickly as the missing operators.</p>
-
-<p>The typical error message that indicates you need an additional cast looks
-like</p>
-
-<p><code>Cannot apply '>' to arguments of type '<ANY> > <CHAR(1)>'. Supported
-form(s): '<COMPARABLE_TYPE> > <COMPARABLE_TYPE>'</code></p>
-
-<ul>
-<li>weak optimizer. The current optimizer that transforms the logical plan into a physical plan is not the fully-featured cost based optimizer that Optiq normally uses. This is because some of the transformations that are needed for Drill are not yet fully supported by Optiq. In order to allow end-to-end execution of queries, a deterministic peep-hole optimizer has been used instead. This optimizer cannot handle large plan transformations and so some queries cannot be transformed correctly from logical to physical plan. We expect that the necessary changes to the cost-based optimizer will allow it to be used in an upcoming release, but didn't want to delay the current release waiting for that to happen.</li>
-</ul></li>
-</ul>
-
-<h2 id="try-fancier-queries">Try Fancier Queries</h2>
-
-<p>This query does a join between two files:</p>
-<div class="highlight"><pre><code class="language-text" data-lang="text">SELECT nations.name, regions.name FROM (
- SELECT _MAP['N_REGIONKEY'] as regionKey, _MAP['N_NAME'] as name
- FROM "sample-data/nation.parquet") nations
-join (
- SELECT _MAP['R_REGIONKEY'] as regionKey, _MAP['R_NAME'] as name
- FROM "sample-data/region.parquet") regions
- on nations.regionKey = regions.regionKey
- order by nations.name;
-</code></pre></div>
-<p>Notice the use of sub-queries to avoid the spread of the <code>_MAP</code> idiom.</p>
-
-<p>This query illustrates how a cast is currently necessary to make the parser
-happy:</p>
-<div class="highlight"><pre><code class="language-text" data-lang="text">SELECT
- _MAP['N_REGIONKEY'] as regionKey,
- _MAP['N_NAME'] as name
-FROM
- "sample-data/nation.parquet"
-WHERE
- cast(_MAP['N_NAME'] as varchar) IN ('MOROCCO', 'MOZAMBIQUE');
-</code></pre></div>
-<p>Here are more queries that you can try.</p>
-<div class="highlight"><pre><code class="language-text" data-lang="text">// count distinct
-SELECT count(distinct _MAP['N_REGIONKEY']) FROM "sample-data/nation.parquet";
-
-// aliases
-SELECT
- _MAP['N_REGIONKEY'] as regionKey,
- _MAP['N_NAME'] as name
-FROM "sample-data/nation.parquet";
-
-// order by
-SELECT
- _MAP['N_REGIONKEY'] as regionKey,
- _MAP['N_NAME'] as name
-FROM
- "sample-data/nation.parquet"
-ORDER BY
- _MAP['N_NAME'] DESC;
-
- // subquery order by
-select * from (
-SELECT
- _MAP['N_REGIONKEY'] as regionKey,
- _MAP['N_NAME'] as name
-FROM
- "sample-data/nation.parquet"
-) as x
-ORDER BY
- name DESC;
-
- // String where
-SELECT
- _MAP['N_REGIONKEY'] as regionKey,
- _MAP['N_NAME'] as name
-FROM
- "sample-data/nation.parquet"
-WHERE
- cast(_MAP['N_NAME'] as varchar) > 'M';
-
- // INNER Join + Order (parquet)
-SELECT n.name, r.name FROM
-(SELECT _MAP['N_REGIONKEY'] as regionKey, _MAP['N_NAME'] as name FROM "sample-data/nation.parquet")n
-join (SELECT _MAP['R_REGIONKEY'] as regionKey, _MAP['R_NAME'] as name FROM "sample-data/region.parquet")r
-using (regionKey);
-
-// INNER Join + Order (parquet)
-SELECT n.name, r.name FROM
-(SELECT _MAP['N_REGIONKEY'] as regionKey, _MAP['N_NAME'] as name FROM "sample-data/nation.parquet")n
-join (SELECT _MAP['R_REGIONKEY'] as regionKey, _MAP['R_NAME'] as name FROM "sample-data/region.parquet")r
-on n.regionKey = r.regionKey
-order by n.name;
-</code></pre></div>
-<h2 id="analyze-the-execution-of-queries">Analyze the Execution of Queries</h2>
-
-<p>Drill sends log events to a logback socket appender. This makes it easy to
-catch and filter these log events using a tool called Lilith. You can download
-<a href="http://www.huxhorn.de/">Lilith</a> and install it easily. A tutorial can be
-<a href="http://ekkescorner.wordpress.com/2009/09/05/osgi-logging-part-8%0A-viewing-log-events-lilith/">found here</a>. This is especially important if you find errors
-that you want to report back to the mailing list since Lilith will help you
-isolate the stack trace of interest.</p>
-
-<p>By default, Lilith uses a slightly lurid splash page based on a pre-Raphaelite
-image of the mythical Lilith. This is easily disabled if the image is not to
-your taste (or if your work-mates are not well-versed in Victorian views of
-Sumerian mythology).</p>
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-
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- <p>This section describes how to configure the amount of direct memory allocated to a Drillbit for query processing in a dedicated Drill cluster. When you use Drill in a cluster with other workloads, configure memory as described in section, <a href="/docs/configuring-resources-in-a-mixed-cluster">"Configuring Resources in a Mixed Cluster"</a>. </p>
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-depending on the workload. The total amount of direct memory that a Drillbit
-allocates to query operations cannot exceed the limit set.</p>
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-<p>Drill mainly uses Java direct memory and performs well when executing
-operations in memory instead of storing the operations on disk. Drill does not
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-is written to disk during each phase of a job.</p>
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-a Drillbit. The on-heap memory for Drill is only about 4-8G, which should
-suffice because Drill avoids having data sit in heap memory.</p>
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-<h2 id="modifying-drillbit-memory">Modifying Drillbit Memory</h2>
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-<p>You can modify memory for each Drillbit node in your cluster. To modify the
-memory for a Drillbit, edit the <code>XX:MaxDirectMemorySize</code> parameter in the
-Drillbit startup script located in <code><drill_installation_directory>/conf/drill-
-env.sh</code>.</p>
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-<div class="admonition note">
- <p class="first admonition-title">Note</p>
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- <li class="toctree-l3"><a class="reference internal" href="/docs/installing-the-driver-on-windows/">Installing the Driver on Windows</a></li>
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- <li class="toctree-l3"><a class="reference internal" href="/docs/configuring-odbc-on-mac-os-x/">Configuring ODBC on Mac OS X</a></li>
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- <li class="toctree-l3"><a class="reference internal" href="/docs/configuring-tibco-spotfire-server-with-drill/">Configuring Tibco Spotfire Server with Drill</a></li>
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-
- <p>The ALTER SESSION command changes a system setting for the duration of a
-session. Session level settings override system level settings.</p>
-
-<h2 id="syntax">Syntax</h2>
-
-<p>The ALTER SESSION command supports the following syntax:</p>
-<div class="highlight"><pre><code class="language-text" data-lang="text">ALTER SESSION SET `option_name` = value;
-</code></pre></div>
-<h2 id="parameters">Parameters</h2>
-
-<p><em>option_name</em><br>
-This is the option name as it appears in the systems table.</p>
-
-<p><em>value</em><br>
-A value of the type listed in the sys.options table: number, string, boolean,
-or float. Use the appropriate value type for each option that you set.</p>
-
-<h2 id="usage-notes">Usage Notes</h2>
-
-<p>Use the ALTER SESSION command to set Drill query planning and execution
-options per session in a cluster. The options that you set using the ALTER
-SESSION command only apply to queries that run during the current Drill
-connection. A session ends when you quit the Drill shell. You can set any of
-the system level options at the session level.</p>
-
-<p>You can run the following query to see a complete list of planning and
-execution options that are currently set at the system or session level:</p>
-<div class="highlight"><pre><code class="language-text" data-lang="text">0: jdbc:drill:zk=local> SELECT name, type FROM sys.options WHERE type in ('SYSTEM','SESSION') order by name;
-+------------+----------------------------------------------+
-| name | type |
-+----------------------------------------------+------------+
-| drill.exec.functions.cast_empty_string_to_null | SYSTEM |
-| drill.exec.storage.file.partition.column.label | SYSTEM |
-| exec.errors.verbose | SYSTEM |
-| exec.java_compiler | SYSTEM |
-| exec.java_compiler_debug | SYSTEM |
-\u2026
-+------------+----------------------------------------------+
-</code></pre></div>
-<div class="admonition note">
- <p class="first admonition-title">Note</p>
- <p class="last">This is a truncated version of the list. </p>
-</div>
-
-<h2 id="example">Example</h2>
-
-<p>This example demonstrates how to use the ALTER SESSION command to set the
-<code>store.json.all_text_mode</code> option to \u201ctrue\u201d for the current Drill session.
-Setting this option to \u201ctrue\u201d enables text mode so that Drill reads everything
-in JSON as a text object instead of trying to interpret data types. This
-allows complicated JSON to be read using CASE and CAST.</p>
-<div class="highlight"><pre><code class="language-text" data-lang="text">0: jdbc:drill:zk=local> alter session set `store.json.all_text_mode`= true;
-+------------+------------+
-| ok | summary |
-+------------+------------+
-| true | store.json.all_text_mode updated. |
-+------------+------------+
-1 row selected (0.046 seconds)
-</code></pre></div>
-<p>You can issue a query to see all of the session level settings. Note that the
-option type is case-sensitive.</p>
-<div class="highlight"><pre><code class="language-text" data-lang="text">0: jdbc:drill:zk=local> SELECT name, type, bool_val FROM sys.options WHERE type = 'SESSION' order by name;
-+------------+------------+------------+
-| name | type | bool_val |
-+------------+------------+------------+
-| store.json.all_text_mode | SESSION | true |
-+------------+------------+------------+
-1 row selected (0.176 seconds)
-</code></pre></div>
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- <p>The FROM clause lists the references (tables, views, and subqueries) that data is selected from. Drill expands the traditional concept of a \u201ctable reference\u201d in a standard SQL FROM clause to refer to files and directories in a local or distributed file system.</p>
-
-<h2 id="syntax">Syntax</h2>
-
-<p>The FROM clause supports the following syntax:</p>
-<div class="highlight"><pre><code class="language-text" data-lang="text"> ... FROM table_expression [, \u2026]
-</code></pre></div>
-<h2 id="parameters">Parameters</h2>
-
-<p><em>table_expression</em> </p>
-
-<p>Includes one or more <em>table_references</em> and is typically followed by the WHERE, GROUP BY, ORDER BY, or HAVING clause. </p>
-
-<p><em>table_reference</em></p>
-<div class="highlight"><pre><code class="language-text" data-lang="text"> with_subquery_table_name [ [ AS ] alias [ ( column_alias [, ...] ) ] ]
- table_name [ [ AS ] alias [ ( column_alias [, ...] ) ] ]
- ( subquery ) [ AS ] alias [ ( column_alias [, ...] ) ]
- table_reference [ ON join_condition ]
-</code></pre></div>
-<ul>
-<li><p><em>with_subquery_table_name</em></p>
-
-<p>A table defined by a subquery in the WITH clause.</p>
-
-<ul>
-<li><em>table_name</em> </li>
-</ul>
-
-<p>Name of a table or view. In Drill, you can also refer to a file system directory or a specific file.</p></li>
-<li><p><em>alias</em> </p>
-
-<p>A temporary alternative name for a table or view that provides a convenient shortcut for identifying tables in other parts of a query, such as the WHERE clause. You must supply an alias for a table derived from a subquery. In other table references, aliases are optional. The AS keyword is always optional. Drill does not support the GROUP BY alias.</p></li>
-<li><p><em>column_alias</em> </p>
-
-<p>A temporary alternative name for a column in a table or view.</p></li>
-<li><p><em>subquery</em> </p>
-
-<p>A query expression that evaluates to a table. The table exists only for the duration of the query and is typically given a name or alias, though an alias is not required. You can also define column names for tables that derive from subqueries. Naming column aliases is important when you want to join the results of subqueries to other tables and when you want to select or constrain those columns elsewhere in the query. A subquery may contain an ORDER BY clause, but this clause may have no effect if a LIMIT or OFFSET clause is not also specified.</p></li>
-<li><p><em>join_type</em> </p>
-
-<p>Specifies one of the following join types: </p>
-
-<p>[INNER] JOIN<br>
- LEFT [OUTER] JOIN<br>
- RIGHT [OUTER] JOIN<br>
- FULL [OUTER] JOIN</p></li>
-<li><p><em>ON join_condition</em> </p>
-
-<p>A type of join specification where the joining columns are stated as a condition that follows the ON keyword.<br>
- Example:<br>
- <code>homes join listing on homes.listid=listing.listid and homes.homeid=listing.homeid</code></p></li>
-</ul>
-
-<h2 id="join-types">Join Types</h2>
-
-<p>INNER JOIN </p>
-
-<p>Return matching rows only, based on the join condition or list of joining columns. </p>
-
-<p>OUTER JOIN </p>
-
-<p>Return all of the rows that the equivalent inner join would return plus non-matching rows from the "left" table, "right" table, or both tables. The left table is the first-listed table, and the right table is the second-listed table. The non-matching rows contain NULL values to fill the gaps in the output columns.</p>
-
-<h2 id="usage-notes">Usage Notes</h2>
-
-<ul>
-<li>Joined columns must have comparable data types.</li>
-<li>A join with the ON syntax retains both joining columns in its intermediate result set.</li>
-</ul>
-
-<h2 id="examples">Examples</h2>
-
-<p>The following query uses a workspace named <code>dfw.views</code> and joins a view named \u201ccustview\u201d with a hive table named \u201corders\u201d to determine sales for each membership type:</p>
-<div class="highlight"><pre><code class="language-text" data-lang="text"> 0: jdbc:drill:> select membership, sum(order_total) as sales from hive.orders, custview
- where orders.cust_id=custview.cust_id
- group by membership order by 2;
- +------------+------------+
- | membership | sales |
- +------------+------------+
- | "basic" | 380665 |
- | "silver" | 708438 |
- | "gold" | 2787682 |
- +------------+------------+
- 3 rows selected
-</code></pre></div>
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- <li class="toctree-l2"><a href="javascript: void(0);">Architectural Highlights</a></li>
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- <li class="toctree-l3"><a class="reference internal" href="/docs/flexibility/">Flexibility</a></li>
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- <li class="toctree-l3"><a class="reference internal" href="/docs/performance/">Performance</a></li>
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- </ul>
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- </ul>
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- <li class="toctree-l1"><a href="javascript: void(0);">Tutorials</a></li>
- <ul style="display: none">
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- <li class="toctree-l2"><a class="reference internal" href="/docs/tutorials-introduction/">Tutorials Introduction</a></li>
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- <li class="toctree-l2"><a class="reference internal" href="/docs/drill-in-10-minutes/">Drill in 10 Minutes</a></li>
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- <li class="toctree-l2"><a class="reference internal" href="/docs/analyzing-the-yelp-academic-dataset/">Analyzing the Yelp Academic Dataset</a></li>
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- <li class="toctree-l2"><a href="javascript: void(0);">Learn Drill with the MapR Sandbox</a></li>
- <ul style="display: none">
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- <li class="toctree-l3"><a class="reference internal" href="/docs/about-the-mapr-sandbox/">About the MapR Sandbox</a></li>
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- <li class="toctree-l3"><a class="reference internal" href="/docs/installing-the-apache-drill-sandbox/">Installing the Apache Drill Sandbox</a></li>
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- <li class="toctree-l3"><a class="reference internal" href="/docs/getting-to-know-the-drill-sandbox/">Getting to Know the Drill Sandbox</a></li>
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- <li class="toctree-l3"><a class="reference internal" href="/docs/lesson-1-learn-about-the-data-set/">Lesson 1: Learn about the Data Set</a></li>
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- <li class="toctree-l3"><a class="reference internal" href="/docs/lesson-2-run-queries-with-ansi-sql/">Lesson 2: Run Queries with ANSI SQL</a></li>
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- <li class="toctree-l3"><a class="reference internal" href="/docs/lesson-3-run-queries-on-complex-data-types/">Lesson 3: Run Queries on Complex Data Types</a></li>
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- <li class="toctree-l3"><a class="reference internal" href="/docs/summary/">Summary</a></li>
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- </ul>
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- <li class="toctree-l2"><a class="reference internal" href="/docs/analyzing-highly-dynamic-datasets/">Analyzing Highly Dynamic Datasets</a></li>
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- </ul>
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- <li class="toctree-l1"><a href="javascript: void(0);">Install Drill</a></li>
- <ul style="display: none">
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- <li class="toctree-l2"><a class="reference internal" href="/docs/install-drill-introduction/">Install Drill Introduction</a></li>
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- <li class="toctree-l2"><a href="javascript: void(0);">Installing Drill in Embedded Mode</a></li>
- <ul style="display: none">
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- <li class="toctree-l3"><a class="reference internal" href="/docs/embedded-mode-prerequisites/">Embedded Mode Prerequisites</a></li>
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- <li class="toctree-l3"><a class="reference internal" href="/docs/installing-drill-on-linux-and-mac-os-x/">Installing Drill on Linux and Mac OS X</a></li>
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- <li class="toctree-l3"><a class="reference internal" href="/docs/starting-drill-on-linux-and-mac-os-x/">Starting Drill on Linux and Mac OS X</a></li>
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- <li class="toctree-l3"><a class="reference internal" href="/docs/installing-drill-on-windows/">Installing Drill on Windows</a></li>
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- <li class="toctree-l3"><a class="reference internal" href="/docs/starting-drill-on-windows/">Starting Drill on Windows</a></li>
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- </ul>
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- <li class="toctree-l2"><a href="javascript: void(0);">Installing Drill in Distributed Mode</a></li>
- <ul style="display: none">
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- <li class="toctree-l3"><a class="reference internal" href="/docs/distributed-mode-prerequisites/">Distributed Mode Prerequisites</a></li>
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- <li class="toctree-l3"><a class="reference internal" href="/docs/installing-drill-on-the-cluster/">Installing Drill on the Cluster</a></li>
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- <li class="toctree-l3"><a class="reference internal" href="/docs/starting-drill-in-distributed-mode/">Starting Drill in Distributed Mode</a></li>
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- </ul>
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- </ul>
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- <li class="toctree-l1"><a href="javascript: void(0);">Configure Drill</a></li>
- <ul style="display: none">
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- <li class="toctree-l2"><a class="reference internal" href="/docs/configure-drill-introduction/">Configure Drill Introduction</a></li>
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- <li class="toctree-l2"><a class="reference internal" href="/docs/configuring-drill-memory/">Configuring Drill Memory</a></li>
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- <li class="toctree-l2"><a href="javascript: void(0);">Configuring a Multitenant Cluster</a></li>
- <ul style="display: none">
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- <li class="toctree-l3"><a class="reference internal" href="/docs/configuring-a-multitenant-cluster-introduction/">Configuring a Multitenant Cluster Introduction</a></li>
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- <li class="toctree-l3"><a class="reference internal" href="/docs/configuring-multitenant-resources/">Configuring Multitenant Resources</a></li>
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- <li class="toctree-l3"><a class="reference internal" href="/docs/configuring-resources-for-a-shared-drillbit/">Configuring Resources for a Shared Drillbit</a></li>
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- </ul>
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- <li class="toctree-l2"><a class="reference internal" href="/docs/configuring-user-impersonation/">Configuring User Impersonation</a></li>
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- <li class="toctree-l2"><a class="reference internal" href="/docs/configuring-user-authentication/">Configuring User Authentication</a></li>
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- <li class="toctree-l2"><a href="javascript: void(0);">Configuration Options</a></li>
- <ul style="display: none">
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- <li class="toctree-l3"><a class="reference internal" href="/docs/configuration-options-introduction/">Configuration Options Introduction</a></li>
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- <li class="toctree-l3"><a class="reference internal" href="/docs/start-up-options/">Start-Up Options</a></li>
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- <li class="toctree-l3"><a class="reference internal" href="/docs/planning-and-execution-options/">Planning and Execution Options</a></li>
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- <li class="toctree-l3"><a class="reference internal" href="/docs/persistent-configuration-storage/">Persistent Configuration Storage</a></li>
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- </ul>
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- <li class="toctree-l2"><a class="reference internal" href="/docs/ports-used-by-drill/">Ports Used by Drill</a></li>
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- <li class="toctree-l2"><a class="reference internal" href="/docs/partition-pruning/">Partition Pruning</a></li>
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- </ul>
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- <li class="toctree-l1"><a href="javascript: void(0);">Connect a Data Source</a></li>
- <ul style="display: none">
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- <li class="toctree-l2"><a class="reference internal" href="/docs/connect-a-data-source-introduction/">Connect a Data Source Introduction</a></li>
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- <li class="toctree-l2"><a class="reference internal" href="/docs/storage-plugin-registration/">Storage Plugin Registration</a></li>
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- <li class="toctree-l2"><a href="javascript: void(0);">Storage Plugin Configuration</a></li>
- <ul style="display: none">
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- <li class="toctree-l3"><a class="reference internal" href="/docs/plugin-configuration-introduction/">Plugin Configuration Introduction</a></li>
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- <li class="toctree-l3"><a class="reference internal" href="/docs/workspaces/">Workspaces</a></li>
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- <li class="toctree-l3"><a class="reference internal" href="/docs/file-system-storage-plugin/">File System Storage Plugin</a></li>
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- <li class="toctree-l3"><a class="reference internal" href="/docs/hbase-storage-plugin/">HBase Storage Plugin</a></li>
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- <li class="toctree-l3"><a class="reference internal" href="/docs/hive-storage-plugin/">Hive Storage Plugin</a></li>
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- <li class="toctree-l3"><a class="reference internal" href="/docs/drill-default-input-format/">Drill Default Input Format</a></li>
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- </ul>
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- <li class="toctree-l2"><a class="reference internal" href="/docs/mongodb-plugin-for-apache-drill/">MongoDB Plugin for Apache Drill</a></li>
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- <li class="toctree-l2"><a class="reference internal" href="/docs/mapr-db-format/">MapR-DB Format</a></li>
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- </ul>
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- <li class="toctree-l1"><a href="javascript: void(0);">ODBC/JDBC Interfaces</a></li>
- <ul style="display: none">
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- <li class="toctree-l2"><a class="reference internal" href="/docs/interfaces-introduction/">Interfaces Introduction</a></li>
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- <li class="toctree-l2"><a class="reference internal" href="/docs/using-jdbc/">Using JDBC</a></li>
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- <li class="toctree-l2"><a href="javascript: void(0);">Using ODBC on Linux and Mac OS X</a></li>
- <ul style="display: none">
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- <li class="toctree-l3"><a class="reference internal" href="/docs/odbc-on-linux-and-mac-introduction/">ODBC on Linux and Mac Introduction</a></li>
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- <li class="toctree-l3"><a class="reference internal" href="/docs/installing-the-driver-on-linux/">Installing the Driver on Linux</a></li>
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- <li class="toctree-l3"><a class="reference internal" href="/docs/installing-the-driver-on-mac-os-x/">Installing the Driver on Mac OS X</a></li>
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- <li class="toctree-l3"><a class="reference internal" href="/docs/configuring-connections-on-linux-and-mac-os-x/">Configuring Connections on Linux and Mac OS X</a></li>
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- <li class="toctree-l3"><a class="reference internal" href="/docs/driver-configuration-options/">Driver Configuration Options</a></li>
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- <li class="toctree-l3"><a class="reference internal" href="/docs/using-a-connection-string/">Using a Connection String</a></li>
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- <li class="toctree-l3"><a class="reference internal" href="/docs/advanced-properties/">Advanced Properties</a></li>
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- <li class="toctree-l3"><a class="reference internal" href="/docs/testing-the-odbc-connection/">Testing the ODBC Connection</a></li>
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- </ul>
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- <li class="toctree-l2"><a href="javascript: void(0);">Using ODBC on Windows</a></li>
- <ul style="display: none">
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- <li class="toctree-l3"><a class="reference internal" href="/docs/installing-the-driver-on-windows/">Installing the Driver on Windows</a></li>
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- <li class="toctree-l3"><a class="reference internal" href="/docs/configuring-connections-on-windows/">Configuring Connections on Windows</a></li>
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- <li class="toctree-l3"><a class="reference internal" href="/docs/connecting-to-odbc-data-sources/">Connecting to ODBC Data Sources</a></li>
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- <li class="toctree-l3"><a class="reference internal" href="/docs/tableau-examples/">Tableau Examples</a></li>
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- <li class="toctree-l3"><a class="reference internal" href="/docs/using-drill-explorer-on-windows/">Using Drill Explorer on Windows</a></li>
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- </ul>
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-
- <li class="toctree-l2"><a class="reference internal" href="/docs/using-microstrategy-analytics-with-apache-drill/">Using MicroStrategy Analytics with Apache Drill</a></li>
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- <li class="toctree-l2"><a class="reference internal" href="/docs/using-tibco-spotfire-with-drill/">Using Tibco Spotfire with Drill</a></li>
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- <li class="toctree-l2"><a class="reference internal" href="/docs/using-apache-drill-with-tableau-9-desktop/">Using Apache Drill with Tableau 9 Desktop</a></li>
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- <li class="toctree-l2"><a class="reference internal" href="/docs/using-apache-drill-with-tableau-9-server/">Using Apache Drill with Tableau 9 Server</a></li>
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- </ul>
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- <li class="toctree-l1"><a href="javascript: void(0);">Query Data</a></li>
- <ul style="display: none">
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- <li class="toctree-l2"><a class="reference internal" href="/docs/query-data-introduction/">Query Data Introduction</a></li>
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- <li class="toctree-l2"><a href="javascript: void(0);">Querying a File System</a></li>
- <ul style="display: none">
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- <li class="toctree-l3"><a class="reference internal" href="/docs/querying-a-file-system-introduction/">Querying a File System Introduction</a></li>
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- <li class="toctree-l3"><a class="reference internal" href="/docs/querying-json-files/">Querying JSON Files</a></li>
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- <li class="toctree-l3"><a class="reference internal" href="/docs/querying-parquet-files/">Querying Parquet Files</a></li>
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- <li class="toctree-l3"><a class="reference internal" href="/docs/querying-plain-text-files/">Querying Plain Text Files</a></li>
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- <li class="toctree-l3"><a class="reference internal" href="/docs/querying-directories/">Querying Directories</a></li>
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- </ul>
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- <li class="toctree-l2"><a class="reference internal" href="/docs/querying-hbase/">Querying HBase</a></li>
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- <li class="toctree-l2"><a href="javascript: void(0);">Querying Complex Data</a></li>
- <ul style="display: none">
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- <li class="toctree-l3"><a class="reference internal" href="/docs/querying-complex-data-introduction/">Querying Complex Data Introduction</a></li>
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- <li class="toctree-l3"><a class="reference internal" href="/docs/sample-data-donuts/">Sample Data: Donuts</a></li>
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- <li class="toctree-l3"><a class="reference internal" href="/docs/selecting-flat-data/">Selecting Flat Data</a></li>
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- <li class="toctree-l3"><a class="reference internal" href="/docs/using-sql-functions-clauses-and-joins/">Using SQL Functions, Clauses, and Joins</a></li>
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- <li class="toctree-l3"><a class="reference internal" href="/docs/selecting-nested-data-for-a-column/">Selecting Nested Data for a Column</a></li>
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- <li class="toctree-l3"><a class="reference internal" href="/docs/selecting-multiple-columns-within-nested-data/">Selecting Multiple Columns Within Nested Data</a></li>
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- </ul>
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- <li class="toctree-l2"><a class="reference internal" href="/docs/querying-hive/">Querying Hive</a></li>
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- <li class="toctree-l2"><a class="reference internal" href="/docs/querying-the-information-schema/">Querying the INFORMATION SCHEMA</a></li>
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- <li class="toctree-l2"><a class="reference internal" href="/docs/querying-system-tables/">Querying System Tables</a></li>
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- <li class="toctree-l2"><a class="reference internal" href="/docs/monitoring-and-canceling-queries-in-the-drill-web-ui/">Monitoring and Canceling Queries in the Drill Web UI</a></li>
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- </ul>
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- <li class="toctree-l1 current_section "><a href="javascript: void(0);">SQL Reference</a></li>
- <ul class="current_section">
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- <li class="toctree-l2"><a class="reference internal" href="/docs/sql-reference-introduction/">SQL Reference Introduction</a></li>
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- <li class="toctree-l2"><a href="javascript: void(0);">Data Types</a></li>
- <ul style="display: none">
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- <li class="toctree-l3"><a class="reference internal" href="/docs/supported-data-types/">Supported Data Types</a></li>
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- <li class="toctree-l3"><a class="reference internal" href="/docs/date-time-and-timestamp/">Date, Time, and Timestamp</a></li>
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- <li class="toctree-l3"><a class="reference internal" href="/docs/handling-different-data-types/">Handling Different Data Types</a></li>
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- </ul>
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- <li class="toctree-l2"><a class="reference internal" href="/docs/lexical-structure/">Lexical Structure</a></li>
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- <li class="toctree-l2"><a class="reference internal" href="/docs/operators/">Operators</a></li>
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- <li class="toctree-l2"><a href="javascript: void(0);">SQL Functions</a></li>
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- <li class="toctree-l3"><a class="reference internal" href="/docs/about-sql-function-examples/">About SQL Function Examples</a></li>
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- <li class="toctree-l3"><a class="reference internal" href="/docs/math-and-trig/">Math and Trig</a></li>
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- <li class="toctree-l3"><a class="reference internal" href="/docs/data-type-conversion/">Data Type Conversion</a></li>
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- <li class="toctree-l3"><a class="reference internal" href="/docs/date-time-functions-and-arithmetic/">Date/Time Functions and Arithmetic</a></li>
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- <li class="toctree-l3"><a class="reference internal" href="/docs/string-manipulation/">String Manipulation</a></li>
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- <li class="toctree-l3"><a class="reference internal" href="/docs/aggregate-and-aggregate-statistical/">Aggregate and Aggregate Statistical</a></li>
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- <li class="toctree-l3"><a class="reference internal" href="/docs/functions-for-handling-nulls/">Functions for Handling Nulls</a></li>
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- </ul>
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- <li class="toctree-l2"><a href="javascript: void(0);">Nested Data Functions</a></li>
- <ul style="display: none">
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- <li class="toctree-l3"><a class="reference internal" href="/docs/nested-data-limitations/">Nested Data Limitations</a></li>
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- <li class="toctree-l3"><a class="reference internal" href="/docs/flatten/">FLATTEN</a></li>
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- <li class="toctree-l3"><a class="reference internal" href="/docs/kvgen/">KVGEN</a></li>
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- <li class="toctree-l3"><a class="reference internal" href="/docs/repeated-count/">REPEATED_COUNT</a></li>
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- <li class="toctree-l3"><a class="reference internal" href="/docs/repeated-contains/">REPEATED_CONTAINS</a></li>
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- </ul>
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- <li class="toctree-l2"><a class="reference internal" href="/docs/query-directory-functions/">Query Directory Functions</a></li>
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- <li class="toctree-l2"><a href="javascript: void(0);">SQL Commands</a></li>
- <ul style="">
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- <li class="toctree-l3"><a class="reference internal" href="/docs/supported-sql-commands/">Supported SQL Commands</a></li>
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- <li class="toctree-l3"><a class="reference internal" href="/docs/alter-session-command/">ALTER SESSION Command</a></li>
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- <li class="toctree-l3"><a class="reference internal" href="/docs/alter-system-command/">ALTER SYSTEM Command</a></li>
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- <li class="toctree-l3"><a class="reference internal" href="/docs/create-table-as-ctas-command/">CREATE TABLE AS (CTAS) Command</a></li>
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- <li class="toctree-l3 current"><a class="reference internal" href="/docs/create-view-command/">CREATE VIEW Command</a></li>
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- <li class="toctree-l3"><a class="reference internal" href="/docs/describe-command/">DESCRIBE Command</a></li>
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- <li class="toctree-l3"><a class="reference internal" href="/docs/explain-commands/">EXPLAIN Commands</a></li>
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- <li class="toctree-l3"><a class="reference internal" href="/docs/select-statements/">SELECT Statements</a></li>
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- <li class="toctree-l3"><a class="reference internal" href="/docs/show-databases-and-show-schemas-command/">SHOW DATABASES and SHOW SCHEMAS Command</a></li>
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- <li class="toctree-l3"><a class="reference internal" href="/docs/show-files-command/">SHOW FILES Command</a></li>
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- <li class="toctree-l3"><a class="reference internal" href="/docs/show-tables-command/">SHOW TABLES Command</a></li>
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- <li class="toctree-l3"><a class="reference internal" href="/docs/use-command/">USE Command</a></li>
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- <li class="toctree-l2"><a href="javascript: void(0);">SQL Conditional Expressions</a></li>
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- <li class="toctree-l3"><a class="reference internal" href="/docs/case/">CASE</a></li>
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- <li class="toctree-l2"><a class="reference internal" href="/docs/sql-extensions/">SQL Extensions</a></li>
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- </ul>
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- <li class="toctree-l1"><a href="javascript: void(0);">Data Sources and File Formats</a></li>
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- <li class="toctree-l2"><a class="reference internal" href="/docs/data-sources-and-file-formats-introduction/">Data Sources and File Formats Introduction</a></li>
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- <li class="toctree-l2"><a class="reference internal" href="/docs/hive-to-drill-data-type-mapping/">Hive-to-Drill Data Type Mapping</a></li>
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- <li class="toctree-l2"><a class="reference internal" href="/docs/deploying-and-using-a-hive-udf/">Deploying and Using a Hive UDF</a></li>
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- <li class="toctree-l2"><a class="reference internal" href="/docs/parquet-format/">Parquet Format</a></li>
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- <li class="toctree-l2"><a class="reference internal" href="/docs/json-data-model/">JSON Data Model</a></li>
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- </ul>
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- <li class="toctree-l1"><a href="javascript: void(0);">Develop Custom Functions</a></li>
- <ul style="display: none">
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- <li class="toctree-l2"><a class="reference internal" href="/docs/develop-custom-functions-introduction/">Develop Custom Functions Introduction</a></li>
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- <li class="toctree-l2"><a class="reference internal" href="/docs/develop-a-simple-function/">Develop a Simple Function</a></li>
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- <li class="toctree-l2"><a class="reference internal" href="/docs/developing-an-aggregate-function/">Developing an Aggregate Function</a></li>
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- <li class="toctree-l2"><a class="reference internal" href="/docs/adding-custom-functions-to-drill/">Adding Custom Functions to Drill</a></li>
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- <li class="toctree-l2"><a class="reference internal" href="/docs/using-custom-functions-in-queries/">Using Custom Functions in Queries</a></li>
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- <li class="toctree-l2"><a class="reference internal" href="/docs/custom-function-interfaces/">Custom Function Interfaces</a></li>
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- </ul>
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- <li class="toctree-l1"><a href="javascript: void(0);">Developer Information</a></li>
- <ul style="display: none">
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- <li class="toctree-l2"><a href="javascript: void(0);">Develop Drill</a></li>
- <ul style="display: none">
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- <li class="toctree-l3"><a class="reference internal" href="/docs/compiling-drill-from-source/">Compiling Drill from Source</a></li>
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- <li class="toctree-l3"><a class="reference internal" href="/docs/drill-patch-review-tool/">Drill Patch Review Tool</a></li>
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- </ul>
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- <li class="toctree-l2"><a href="javascript: void(0);">Contribute to Drill</a></li>
- <ul style="display: none">
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- <li class="toctree-l3"><a class="reference internal" href="/docs/apache-drill-contribution-guidelines/">Apache Drill Contribution Guidelines</a></li>
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- <li class="toctree-l3"><a class="reference internal" href="/docs/apache-drill-contribution-ideas/">Apache Drill Contribution Ideas</a></li>
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- </ul>
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- <li class="toctree-l2"><a href="javascript: void(0);">Design Docs</a></li>
- <ul style="display: none">
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- <li class="toctree-l3"><a class="reference internal" href="/docs/drill-plan-syntax/">Drill Plan Syntax</a></li>
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-
- <p>The CREATE VIEW command creates a virtual structure for the result set of a
-stored query. A view can combine data from multiple underlying data sources
-and provide the illusion that all of the data is from one source. You can use
-views to protect sensitive data, for data aggregation, and to hide data
-complexity from users. You can create Drill views from files in your local and
-distributed file systems, Hive, HBase, and MapR-DB tables, as well as from
-existing views or any other available storage plugin data sources.</p>
-
-<h2 id="syntax">Syntax</h2>
-
-<p>The CREATE VIEW command supports the following syntax:</p>
-<div class="highlight"><pre><code class="language-text" data-lang="text">CREATE [OR REPLACE] VIEW [workspace.]view_name [ (column_name [, ...]) ] AS <query>;
-</code></pre></div>
-<p>Use CREATE VIEW to create a new view. Use CREATE OR REPLACE VIEW to replace an
-existing view with the same name. When you replace a view, the query must
-generate the same set of columns with the same column names and data types.</p>
-
-<p><strong>Note:</strong> Follow Drill\u2019s rules for identifiers when you name the view. See coming soon...</p>
-
-<h2 id="parameters">Parameters</h2>
-
-<p><em>workspace</em><br>
-The location where you want the view to exist. By default, the view is created
-in the current workspace. See
-<a href="/docs/Workspaces">Workspaces</a>.</p>
-
-<p><em>view_name</em><br>
-The name that you give the view. The view must have a unique name. It cannot
-have the same name as any other view or table in the workspace.</p>
-
-<p><em>column_name</em><br>
-Optional list of column names in the view. If you do not supply column names,
-they are derived from the query.</p>
-
-<p><em>query</em><br>
-A SELECT statement that defines the columns and rows in the view.</p>
-
-<h2 id="usage-notes">Usage Notes</h2>
-
-<h3 id="storage">Storage</h3>
-
-<p>Drill stores views in the location specified by the workspace that you use
-when you run the CREATE VIEW command. If the workspace is not defined, Drill
-creates the view in the current workspace. You must use a writable workspace
-when you create a view. Currently, Drill only supports views created in the
-file system or distributed file system.</p>
-
-<p>The following example shows a writable workspace as defined within the storage
-plugin in the <code>/tmp</code> directory of the file system:</p>
-<div class="highlight"><pre><code class="language-text" data-lang="text">"tmp": {
- "location": "/tmp",
- "writable": true,
- }
-</code></pre></div>
-<p>Drill stores the view definition in JSON format with the name that you specify
-when you run the CREATE VIEW command, suffixed <code>by .view.drill</code>. For example,
-if you create a view named <code>myview</code>, Drill stores the view in the designated
-workspace as <code>myview.view.drill</code>.</p>
-
-<p>Data Sources</p>
-
-<p>Drill considers data sources to have either a strong schema or a weak schema. </p>
-
-<h5 id="strong-schema">Strong Schema</h5>
-
-<p>With the exception of text file data sources, Drill verifies that data sources
-associated with a strong schema contain data types compatible with those used
-in the query. Drill also verifies that the columns referenced in the query
-exist in the underlying data sources. If the columns do not exist, CREATE VIEW
-fails.</p>
-
-<h4 id="weak-schema">Weak Schema</h4>
-
-<p>Drill does not verify that data sources associated with a weak schema contain
-data types compatible with those used in the query. Drill does not verify if
-columns referenced in a query on a Parquet data source exist, therefore CREATE
-VIEW always succeeds. In the case of JSON files, Drill does not verify if the
-files contain the maps specified in the view.</p>
-
-<p>The following table lists the current categories of schema and the data
-sources associated with each:</p>
-
-<table>
- <tr>
- <th></th>
- <th>Strong Schema</th>
- <th>Weak Schema</th>
- </tr>
- <tr>
- <td valign="top">Data Sources</td>
- <td>views<br>hive tables<br>hbase column families<br>text</td>
- <td>json<br>mongodb<br>hbase column qualifiers<br>parquet</td>
- </tr>
-</table>
-
-
-<h2 id="related-commands">Related Commands</h2>
-
-<p>After you create a view using the CREATE VIEW command, you can issue the
-following commands against the view:</p>
-
-<ul>
-<li>SELECT </li>
-<li>DESCRIBE </li>
-<li>DROP </li>
-</ul>
-
-<div class="admonition note">
- <p class="first admonition-title">Note</p>
- <p class="last">You cannot update, insert into, or delete from a view. </p>
-</div>
-
-<h2 id="example">Example</h2>
-
-<p>This example shows you some steps that you can follow when you want to create
-a view in Drill using the CREATE VIEW command. A workspace named \u201cdonuts\u201d was
-created for the steps in this example.</p>
-
-<p>Complete the following steps to create a view in Drill:</p>
-
-<ol>
-<li><p>Decide which workspace you will use to create the view, and verify that the writable option is set to \u201ctrue.\u201d You can use an existing workspace, or you can create a new workspace. See <a href="https://cwiki.apache.org/confluence/display/DRILL/Workspaces">Workspaces</a> for more information. </p>
-<div class="highlight"><pre><code class="language-text" data-lang="text">"workspaces": {
- "donuts": {
- "location": "/home/donuts",
- "writable": true,
- "defaultInputFormat": null
- }
- },
-</code></pre></div></li>
-<li><p>Run SHOW DATABASES to verify that Drill recognizes the workspace. </p>
-<div class="highlight"><pre><code class="language-text" data-lang="text">0: jdbc:drill:zk=local> show databases;
-+-------------+
-| SCHEMA_NAME |
-+-------------+
-| dfs.default |
-| dfs.root |
-| dfs.donuts |
-| dfs.tmp |
-| cp.default |
-| sys |
-| INFORMATION_SCHEMA |
-+-------------+
-</code></pre></div></li>
-<li><p>Use the writable workspace. </p>
-<div class="highlight"><pre><code class="language-text" data-lang="text">0: jdbc:drill:zk=local> use dfs.donuts;
-+------------+------------+
-| ok | summary |
-+------------+------------+
-| true | Default schema changed to 'dfs.donuts' |
-+------------+------------+
-</code></pre></div></li>
-<li><p>Test run the query that you plan to use with the CREATE VIEW command. </p>
-<div class="highlight"><pre><code class="language-text" data-lang="text">0: jdbc:drill:zk=local> select id, type, name, ppu from `donuts.json`;
-+------------+------------+------------+------------+
-| id | type | name | ppu |
-+------------+------------+------------+------------+
-| 0001 | donut | Cake | 0.55 |
-+------------+------------+------------+------------+
-</code></pre></div></li>
-<li><p>Run the CREATE VIEW command with the query. </p>
-<div class="highlight"><pre><code class="language-text" data-lang="text">0: jdbc:drill:zk=local> create view mydonuts as select id, type, name, ppu from `donuts.json`;
-+------------+------------+
-| ok | summary |
-+------------+------------+
-| true | View 'mydonuts' created successfully in 'dfs.donuts' schema |
-+------------+------------+
-</code></pre></div></li>
-<li><p>Create a new view in another workspace from the current workspace. </p>
-<div class="highlight"><pre><code class="language-text" data-lang="text">0: jdbc:drill:zk=local> create view dfs.tmp.yourdonuts as select id, type, name from `donuts.json`;
-+------------+------------+
-| ok | summary |
-+------------+------------+
-| true | View 'yourdonuts' created successfully in 'dfs.tmp' schema |
-+------------+------------+
-</code></pre></div></li>
-<li><p>Query the view created in both workspaces.</p>
-<div class="highlight"><pre><code class="language-text" data-lang="text">0: jdbc:drill:zk=local> select * from mydonuts;
-+------------+------------+------------+------------+
-| id | type | name | ppu |
-+------------+------------+------------+------------+
-| 0001 | donut | Cake | 0.55 |
-+------------+------------+------------+------------+
-
-0: jdbc:drill:zk=local> select * from dfs.tmp.yourdonuts;
-+------------+------------+------------+
-| id | type | name |
-+------------+------------+------------+
-| 0001 | donut | Cake |
-+------------+------------+------------+
-</code></pre></div></li>
-</ol>
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- <li class="toctree-l3"><a class="reference internal" href="/docs/installing-drill-on-windows/">Installing Drill on Windows</a></li>
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- <li class="toctree-l3"><a class="reference internal" href="/docs/starting-drill-on-windows/">Starting Drill on Windows</a></li>
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- </ul>
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- <li class="toctree-l2"><a href="javascript: void(0);">Installing Drill in Distributed Mode</a></li>
- <ul style="display: none">
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- <li class="toctree-l3"><a class="reference internal" href="/docs/distributed-mode-prerequisites/">Distributed Mode Prerequisites</a></li>
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- <li class="toctree-l3"><a class="reference internal" href="/docs/installing-drill-on-the-cluster/">Installing Drill on the Cluster</a></li>
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- <li class="toctree-l3"><a class="reference internal" href="/docs/starting-drill-in-distributed-mode/">Starting Drill in Distributed Mode</a></li>
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- </ul>
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- </ul>
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- <li class="toctree-l1"><a href="javascript: void(0);">Configure Drill</a></li>
- <ul style="display: none">
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- <li class="toctree-l2"><a class="reference internal" href="/docs/configure-drill-introduction/">Configure Drill Introduction</a></li>
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- <li class="toctree-l2"><a class="reference internal" href="/docs/configuring-drill-memory/">Configuring Drill Memory</a></li>
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- <li class="toctree-l2"><a href="javascript: void(0);">Configuring a Multitenant Cluster</a></li>
- <ul style="display: none">
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- <li class="toctree-l3"><a class="reference internal" href="/docs/configuring-a-multitenant-cluster-introduction/">Configuring a Multitenant Cluster Introduction</a></li>
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- <li class="toctree-l3"><a class="reference internal" href="/docs/configuring-multitenant-resources/">Configuring Multitenant Resources</a></li>
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- <li class="toctree-l3"><a class="reference internal" href="/docs/configuring-resources-for-a-shared-drillbit/">Configuring Resources for a Shared Drillbit</a></li>
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- </ul>
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- <li class="toctree-l2"><a class="reference internal" href="/docs/configuring-user-impersonation/">Configuring User Impersonation</a></li>
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- <li class="toctree-l2"><a class="reference internal" href="/docs/configuring-user-authentication/">Configuring User Authentication</a></li>
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- <li class="toctree-l2"><a href="javascript: void(0);">Configuration Options</a></li>
- <ul style="display: none">
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- <li class="toctree-l3"><a class="reference internal" href="/docs/configuration-options-introduction/">Configuration Options Introduction</a></li>
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- <li class="toctree-l3"><a class="reference internal" href="/docs/start-up-options/">Start-Up Options</a></li>
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- <li class="toctree-l3"><a class="reference internal" href="/docs/planning-and-execution-options/">Planning and Execution Options</a></li>
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- <li class="toctree-l3"><a class="reference internal" href="/docs/persistent-configuration-storage/">Persistent Configuration Storage</a></li>
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- </ul>
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- <li class="toctree-l2"><a class="reference internal" href="/docs/ports-used-by-drill/">Ports Used by Drill</a></li>
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- <li class="toctree-l2"><a class="reference internal" href="/docs/partition-pruning/">Partition Pruning</a></li>
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- </ul>
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- <li class="toctree-l1"><a href="javascript: void(0);">Connect a Data Source</a></li>
- <ul style="display: none">
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- <li class="toctree-l2"><a class="reference internal" href="/docs/connect-a-data-source-introduction/">Connect a Data Source Introduction</a></li>
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- <li class="toctree-l2"><a class="reference internal" href="/docs/storage-plugin-registration/">Storage Plugin Registration</a></li>
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- <li class="toctree-l2"><a href="javascript: void(0);">Storage Plugin Configuration</a></li>
- <ul style="display: none">
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- <li class="toctree-l3"><a class="reference internal" href="/docs/plugin-configuration-introduction/">Plugin Configuration Introduction</a></li>
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- <li class="toctree-l3"><a class="reference internal" href="/docs/workspaces/">Workspaces</a></li>
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- <li class="toctree-l3"><a class="reference internal" href="/docs/file-system-storage-plugin/">File System Storage Plugin</a></li>
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- <li class="toctree-l3"><a class="reference internal" href="/docs/hbase-storage-plugin/">HBase Storage Plugin</a></li>
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- <li class="toctree-l3"><a class="reference internal" href="/docs/hive-storage-plugin/">Hive Storage Plugin</a></li>
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- <li class="toctree-l3"><a class="reference internal" href="/docs/drill-default-input-format/">Drill Default Input Format</a></li>
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- </ul>
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- <li class="toctree-l2"><a class="reference internal" href="/docs/mongodb-plugin-for-apache-drill/">MongoDB Plugin for Apache Drill</a></li>
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- <li class="toctree-l2"><a class="reference internal" href="/docs/mapr-db-format/">MapR-DB Format</a></li>
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- </ul>
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- <li class="toctree-l1"><a href="javascript: void(0);">ODBC/JDBC Interfaces</a></li>
- <ul style="display: none">
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- <li class="toctree-l2"><a class="reference internal" href="/docs/interfaces-introduction/">Interfaces Introduction</a></li>
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- <li class="toctree-l2"><a class="reference internal" href="/docs/using-jdbc/">Using JDBC</a></li>
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- <li class="toctree-l2"><a href="javascript: void(0);">Using ODBC on Linux and Mac OS X</a></li>
- <ul style="display: none">
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- <li class="toctree-l3"><a class="reference internal" href="/docs/odbc-on-linux-and-mac-introduction/">ODBC on Linux and Mac Introduction</a></li>
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- <li class="toctree-l3"><a class="reference internal" href="/docs/installing-the-driver-on-linux/">Installing the Driver on Linux</a></li>
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- <li class="toctree-l3"><a class="reference internal" href="/docs/installing-the-driver-on-mac-os-x/">Installing the Driver on Mac OS X</a></li>
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- <li class="toctree-l3"><a class="reference internal" href="/docs/configuring-connections-on-linux-and-mac-os-x/">Configuring Connections on Linux and Mac OS X</a></li>
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- <li class="toctree-l3"><a class="reference internal" href="/docs/driver-configuration-options/">Driver Configuration Options</a></li>
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- <li class="toctree-l3"><a class="reference internal" href="/docs/using-a-connection-string/">Using a Connection String</a></li>
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- <li class="toctree-l3"><a class="reference internal" href="/docs/advanced-properties/">Advanced Properties</a></li>
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- <li class="toctree-l3"><a class="reference internal" href="/docs/testing-the-odbc-connection/">Testing the ODBC Connection</a></li>
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- </ul>
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- <li class="toctree-l2"><a href="javascript: void(0);">Using ODBC on Windows</a></li>
- <ul style="display: none">
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- <li class="toctree-l3"><a class="reference internal" href="/docs/installing-the-driver-on-windows/">Installing the Driver on Windows</a></li>
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- <li class="toctree-l3"><a class="reference internal" href="/docs/configuring-connections-on-windows/">Configuring Connections on Windows</a></li>
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- <li class="toctree-l3"><a class="reference internal" href="/docs/connecting-to-odbc-data-sources/">Connecting to ODBC Data Sources</a></li>
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- <li class="toctree-l3"><a class="reference internal" href="/docs/tableau-examples/">Tableau Examples</a></li>
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- <li class="toctree-l3"><a class="reference internal" href="/docs/using-drill-explorer-on-windows/">Using Drill Explorer on Windows</a></li>
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- </ul>
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- <li class="toctree-l2"><a class="reference internal" href="/docs/using-microstrategy-analytics-with-apache-drill/">Using MicroStrategy Analytics with Apache Drill</a></li>
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- <li class="toctree-l2"><a class="reference internal" href="/docs/using-tibco-spotfire-with-drill/">Using Tibco Spotfire with Drill</a></li>
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- <li class="toctree-l2"><a class="reference internal" href="/docs/using-apache-drill-with-tableau-9-desktop/">Using Apache Drill with Tableau 9 Desktop</a></li>
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- <li class="toctree-l2"><a class="reference internal" href="/docs/using-apache-drill-with-tableau-9-server/">Using Apache Drill with Tableau 9 Server</a></li>
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- </ul>
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- <li class="toctree-l1"><a href="javascript: void(0);">Query Data</a></li>
- <ul style="display: none">
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- <li class="toctree-l2"><a class="reference internal" href="/docs/query-data-introduction/">Query Data Introduction</a></li>
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- <li class="toctree-l2"><a href="javascript: void(0);">Querying a File System</a></li>
- <ul style="display: none">
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- <li class="toctree-l3"><a class="reference internal" href="/docs/querying-a-file-system-introduction/">Querying a File System Introduction</a></li>
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- <li class="toctree-l3"><a class="reference internal" href="/docs/querying-json-files/">Querying JSON Files</a></li>
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- <li class="toctree-l3"><a class="reference internal" href="/docs/querying-parquet-files/">Querying Parquet Files</a></li>
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- <li class="toctree-l3"><a class="reference internal" href="/docs/querying-plain-text-files/">Querying Plain Text Files</a></li>
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- <li class="toctree-l3"><a class="reference internal" href="/docs/querying-directories/">Querying Directories</a></li>
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- </ul>
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- <li class="toctree-l2"><a class="reference internal" href="/docs/querying-hbase/">Querying HBase</a></li>
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- <li class="toctree-l2"><a href="javascript: void(0);">Querying Complex Data</a></li>
- <ul style="display: none">
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- <li class="toctree-l3"><a class="reference internal" href="/docs/querying-complex-data-introduction/">Querying Complex Data Introduction</a></li>
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- <li class="toctree-l3"><a class="reference internal" href="/docs/sample-data-donuts/">Sample Data: Donuts</a></li>
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- <li class="toctree-l3"><a class="reference internal" href="/docs/selecting-flat-data/">Selecting Flat Data</a></li>
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- <li class="toctree-l3"><a class="reference internal" href="/docs/using-sql-functions-clauses-and-joins/">Using SQL Functions, Clauses, and Joins</a></li>
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- <li class="toctree-l3"><a class="reference internal" href="/docs/selecting-nested-data-for-a-column/">Selecting Nested Data for a Column</a></li>
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- <li class="toctree-l3"><a class="reference internal" href="/docs/selecting-multiple-columns-within-nested-data/">Selecting Multiple Columns Within Nested Data</a></li>
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- </ul>
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- <li class="toctree-l2"><a class="reference internal" href="/docs/querying-hive/">Querying Hive</a></li>
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- <li class="toctree-l2"><a class="reference internal" href="/docs/querying-the-information-schema/">Querying the INFORMATION SCHEMA</a></li>
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- <li class="toctree-l2"><a class="reference internal" href="/docs/querying-system-tables/">Querying System Tables</a></li>
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- <li class="toctree-l2"><a class="reference internal" href="/docs/monitoring-and-canceling-queries-in-the-drill-web-ui/">Monitoring and Canceling Queries in the Drill Web UI</a></li>
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- </ul>
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- <li class="toctree-l1 current_section "><a href="javascript: void(0);">SQL Reference</a></li>
- <ul class="current_section">
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- <li class="toctree-l2"><a class="reference internal" href="/docs/sql-reference-introduction/">SQL Reference Introduction</a></li>
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- <li class="toctree-l2"><a href="javascript: void(0);">Data Types</a></li>
- <ul style="display: none">
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- <li class="toctree-l3"><a class="reference internal" href="/docs/supported-data-types/">Supported Data Types</a></li>
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- <li class="toctree-l3"><a class="reference internal" href="/docs/date-time-and-timestamp/">Date, Time, and Timestamp</a></li>
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- <li class="toctree-l3"><a class="reference internal" href="/docs/handling-different-data-types/">Handling Different Data Types</a></li>
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- </ul>
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- <li class="toctree-l2"><a class="reference internal" href="/docs/lexical-structure/">Lexical Structure</a></li>
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- <li class="toctree-l2"><a class="reference internal" href="/docs/operators/">Operators</a></li>
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- <li class="toctree-l2"><a href="javascript: void(0);">SQL Functions</a></li>
- <ul style="display: none">
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- <li class="toctree-l3"><a class="reference internal" href="/docs/about-sql-function-examples/">About SQL Function Examples</a></li>
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- <li class="toctree-l3"><a class="reference internal" href="/docs/math-and-trig/">Math and Trig</a></li>
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- <li class="toctree-l3"><a class="reference internal" href="/docs/data-type-conversion/">Data Type Conversion</a></li>
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- <li class="toctree-l3"><a class="reference internal" href="/docs/date-time-functions-and-arithmetic/">Date/Time Functions and Arithmetic</a></li>
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- <li class="toctree-l3"><a class="reference internal" href="/docs/string-manipulation/">String Manipulation</a></li>
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- <li class="toctree-l3"><a class="reference internal" href="/docs/aggregate-and-aggregate-statistical/">Aggregate and Aggregate Statistical</a></li>
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- <li class="toctree-l3"><a class="reference internal" href="/docs/functions-for-handling-nulls/">Functions for Handling Nulls</a></li>
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- </ul>
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- <li class="toctree-l2"><a href="javascript: void(0);">Nested Data Functions</a></li>
- <ul style="display: none">
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- <li class="toctree-l3"><a class="reference internal" href="/docs/nested-data-limitations/">Nested Data Limitations</a></li>
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- <li class="toctree-l3"><a class="reference internal" href="/docs/flatten/">FLATTEN</a></li>
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- <li class="toctree-l3"><a class="reference internal" href="/docs/kvgen/">KVGEN</a></li>
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- <li class="toctree-l3"><a class="reference internal" href="/docs/repeated-count/">REPEATED_COUNT</a></li>
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- <li class="toctree-l3"><a class="reference internal" href="/docs/repeated-contains/">REPEATED_CONTAINS</a></li>
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- </ul>
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- <li class="toctree-l2"><a class="reference internal" href="/docs/query-directory-functions/">Query Directory Functions</a></li>
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- <li class="toctree-l2"><a href="javascript: void(0);">SQL Commands</a></li>
- <ul style="">
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- <li class="toctree-l3"><a class="reference internal" href="/docs/supported-sql-commands/">Supported SQL Commands</a></li>
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- <li class="toctree-l3"><a class="reference internal" href="/docs/alter-session-command/">ALTER SESSION Command</a></li>
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- <li class="toctree-l3"><a class="reference internal" href="/docs/alter-system-command/">ALTER SYSTEM Command</a></li>
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- <li class="toctree-l3 current"><a class="reference internal" href="/docs/create-table-as-ctas-command/">CREATE TABLE AS (CTAS) Command</a></li>
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- <li class="toctree-l3"><a class="reference internal" href="/docs/create-view-command/">CREATE VIEW Command</a></li>
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- <li class="toctree-l3"><a class="reference internal" href="/docs/describe-command/">DESCRIBE Command</a></li>
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- <li class="toctree-l3"><a class="reference internal" href="/docs/explain-commands/">EXPLAIN Commands</a></li>
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- <li class="toctree-l3"><a class="reference internal" href="/docs/select-statements/">SELECT Statements</a></li>
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- <li class="toctree-l3"><a class="reference internal" href="/docs/show-databases-and-show-schemas-command/">SHOW DATABASES and SHOW SCHEMAS Command</a></li>
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- <li class="toctree-l3"><a class="reference internal" href="/docs/show-files-command/">SHOW FILES Command</a></li>
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- <li class="toctree-l3"><a class="reference internal" href="/docs/show-tables-command/">SHOW TABLES Command</a></li>
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- <li class="toctree-l3"><a class="reference internal" href="/docs/use-command/">USE Command</a></li>
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- </ul>
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- <li class="toctree-l2"><a href="javascript: void(0);">SQL Conditional Expressions</a></li>
- <ul style="display: none">
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- <li class="toctree-l3"><a class="reference internal" href="/docs/case/">CASE</a></li>
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- </ul>
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- <li class="toctree-l2"><a class="reference internal" href="/docs/reserved-keywords/">Reserved Keywords</a></li>
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- <li class="toctree-l2"><a class="reference internal" href="/docs/sql-extensions/">SQL Extensions</a></li>
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- </ul>
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- <li class="toctree-l1"><a href="javascript: void(0);">Data Sources and File Formats</a></li>
- <ul style="display: none">
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- <li class="toctree-l2"><a class="reference internal" href="/docs/data-sources-and-file-formats-introduction/">Data Sources and File Formats Introduction</a></li>
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- <li class="toctree-l2"><a class="reference internal" href="/docs/hive-to-drill-data-type-mapping/">Hive-to-Drill Data Type Mapping</a></li>
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- <li class="toctree-l2"><a class="reference internal" href="/docs/deploying-and-using-a-hive-udf/">Deploying and Using a Hive UDF</a></li>
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- <li class="toctree-l2"><a class="reference internal" href="/docs/parquet-format/">Parquet Format</a></li>
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- <li class="toctree-l2"><a class="reference internal" href="/docs/json-data-model/">JSON Data Model</a></li>
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- </ul>
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- <li class="toctree-l1"><a href="javascript: void(0);">Develop Custom Functions</a></li>
- <ul style="display: none">
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- <li class="toctree-l2"><a class="reference internal" href="/docs/develop-custom-functions-introduction/">Develop Custom Functions Introduction</a></li>
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- <li class="toctree-l2"><a class="reference internal" href="/docs/develop-a-simple-function/">Develop a Simple Function</a></li>
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- <li class="toctree-l2"><a class="reference internal" href="/docs/developing-an-aggregate-function/">Developing an Aggregate Function</a></li>
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- <li class="toctree-l2"><a class="reference internal" href="/docs/adding-custom-functions-to-drill/">Adding Custom Functions to Drill</a></li>
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- <li class="toctree-l2"><a class="reference internal" href="/docs/using-custom-functions-in-queries/">Using Custom Functions in Queries</a></li>
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- <li class="toctree-l2"><a class="reference internal" href="/docs/custom-function-interfaces/">Custom Function Interfaces</a></li>
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- </ul>
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- <li class="toctree-l1"><a href="javascript: void(0);">Developer Information</a></li>
- <ul style="display: none">
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- <li class="toctree-l2"><a href="javascript: void(0);">Develop Drill</a></li>
- <ul style="display: none">
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- <li class="toctree-l3"><a class="reference internal" href="/docs/compiling-drill-from-source/">Compiling Drill from Source</a></li>
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- <li class="toctree-l3"><a class="reference internal" href="/docs/drill-patch-review-tool/">Drill Patch Review Tool</a></li>
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- </ul>
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- <li class="toctree-l2"><a href="javascript: void(0);">Contribute to Drill</a></li>
- <ul style="display: none">
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- <li class="toctree-l3"><a class="reference internal" href="/docs/apache-drill-contribution-guidelines/">Apache Drill Contribution Guidelines</a></li>
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- <li class="toctree-l3"><a class="reference internal" href="/docs/apache-drill-contribution-ideas/">Apache Drill Contribution Ideas</a></li>
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- </ul>
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- <li class="toctree-l2"><a href="javascript: void(0);">Design Docs</a></li>
- <ul style="display: none">
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- <li class="toctree-l3"><a class="reference internal" href="/docs/drill-plan-syntax/">Drill Plan Syntax</a></li>
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- <li class="toctree-l3"><a class="reference internal" href="/docs/rpc-overview/">RPC Overview</a></li>
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- <li class="toctree-l3"><a class="reference internal" href="/docs/query-stages/">Query Stages</a></li>
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- <li class="toctree-l3"><a class="reference internal" href="/docs/useful-research/">Useful Research</a></li>
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- <li class="toctree-l3"><a class="reference internal" href="/docs/value-vectors/">Value Vectors</a></li>
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- </ul>
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- </ul>
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- <li class="toctree-l1"><a href="javascript: void(0);">Release Notes</a></li>
- <ul style="display: none">
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- <li class="toctree-l2"><a class="reference internal" href="/docs/apache-drill-0-5-0-release-notes/">Apache Drill 0.5.0 Release Notes</a></li>
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- <li class="toctree-l2"><a class="reference internal" href="/docs/apache-drill-0-4-0-release-notes/">Apache Drill 0.4.0 Release Notes</a></li>
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- <li class="toctree-l2"><a class="reference internal" href="/docs/apache-drill-m1-release-notes-apache-drill-alpha/">Apache Drill M1 Release Notes (Apache Drill Alpha)</a></li>
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- <li class="toctree-l2"><a class="reference internal" href="/docs/apache-drill-m1-release-notes-apache-drill-alpha/">Apache Drill M1 Release Notes (Apache Drill Alpha)</a></li>
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- <li class="toctree-l2"><a class="reference internal" href="/docs/apache-drill-0-6-0-release-notes/">Apache Drill 0.6.0 Release Notes</a></li>
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- <li class="toctree-l2"><a class="reference internal" href="/docs/apache-drill-0-7-0-release-notes/">Apache Drill 0.7.0 Release Notes</a></li>
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- <li class="toctree-l2"><a class="reference internal" href="/docs/apache-drill-0-8-0-release-notes/">Apache Drill 0.8.0 Release Notes</a></li>
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- <li class="toctree-l2"><a class="reference internal" href="/docs/apache-drill-0-9-0-release-notes/">Apache Drill 0.9.0 Release Notes</a></li>
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- </ul>
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- <li class="toctree-l1"><a href="javascript: void(0);">Sample Datasets</a></li>
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- <li class="toctree-l2"><a class="reference internal" href="/docs/aol-search/">AOL Search</a></li>
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- <li class="toctree-l2"><a class="reference internal" href="/docs/enron-emails/">Enron Emails</a></li>
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- <li class="toctree-l2"><a class="reference internal" href="/docs/wikipedia-edit-history/">Wikipedia Edit History</a></li>
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- </ul>
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- <li class="toctree-l1"><a href="javascript: void(0);">Archived Pages</a></li>
- <ul style="display: none">
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- <li class="toctree-l2"><a class="reference internal" href="/docs/how-to-run-the-drill-demo/">How to Run the Drill Demo</a></li>
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- <li class="toctree-l2"><a class="reference internal" href="/docs/what-is-apache-drill/">What is Apache Drill</a></li>
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- </ul>
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-<div class="highlight"><pre><code class="language-text" data-lang="text">CREATE TABLE new_table_name AS <query>;
-</code></pre></div>
-<p>where query is any valid Drill query. Each table you create must have a unique
-name. You can include an optional column list for the new table. For example:</p>
-<div class="highlight"><pre><code class="language-text" data-lang="text">create table logtable(transid, prodid) as select transaction_id, product_id from ...
-</code></pre></div>
-<p>You can store table data in one of three formats:</p>
-
-<ul>
-<li>csv</li>
-<li>parquet</li>
-<li>json</li>
-</ul>
-
-<p>The parquet and json formats can be used to store complex data.</p>
-
-<p>To set the output format for a Drill table, set the <code>store.format</code> option with
-the ALTER SYSTEM or ALTER SESSION command. For example:</p>
-<div class="highlight"><pre><code class="language-text" data-lang="text">alter session set `store.format`='json';
-</code></pre></div>
-<p>Table data is stored in the location specified by the workspace that is in use
-when you run the CTAS statement. By default, a directory is created, using the
-exact table name specified in the CTAS statement. A .json, .csv, or .parquet
-file inside that directory contains the data.</p>
-
-<p>You can only create new tables in workspaces. You cannot create tables in
-other storage plugins such as Hive and HBase.</p>
-
-<p>You must use a writable (mutable) workspace when creating Drill tables. For
-example:</p>
-<div class="highlight"><pre><code class="language-text" data-lang="text">"tmp": {
- "location": "/tmp",
- "writable": true,
- }
-</code></pre></div>
-<h2 id="example">Example</h2>
-
-<p>The following query returns one row from a JSON file:</p>
-<div class="highlight"><pre><code class="language-text" data-lang="text">0: jdbc:drill:zk=local> select id, type, name, ppu
-from dfs.`/Users/brumsby/drill/donuts.json`;
-+------------+------------+------------+------------+
-| id | type | name | ppu |
-+------------+------------+------------+------------+
-| 0001 | donut | Cake | 0.55 |
-+------------+------------+------------+------------+
-1 row selected (0.248 seconds)
-</code></pre></div>
-<p>To create and verify the contents of a table that contains this row:</p>
-
-<ol>
-<li>Set the workspace to a writable workspace.</li>
-<li>Set the <code>store.format</code> option appropriately.</li>
-<li>Run a CTAS statement that contains the query.</li>
-<li>Go to the directory where the table is stored and check the contents of the file.</li>
-<li>Run a query against the new table.</li>
-</ol>
-
-<p>The following sqlline output captures this sequence of steps.</p>
-
-<h3 id="workspace-definition">Workspace Definition</h3>
-<div class="highlight"><pre><code class="language-text" data-lang="text">"tmp": {
- "location": "/tmp",
- "writable": true,
- }
-</code></pre></div>
-<h3 id="alter-session-command">ALTER SESSION Command</h3>
-<div class="highlight"><pre><code class="language-text" data-lang="text">alter session set `store.format`='json';
-</code></pre></div>
-<h3 id="use-command">USE Command</h3>
-<div class="highlight"><pre><code class="language-text" data-lang="text">0: jdbc:drill:zk=local> use dfs.tmp;
-+------------+------------+
-| ok | summary |
-+------------+------------+
-| true | Default schema changed to 'dfs.tmp' |
-+------------+------------+
-1 row selected (0.03 seconds)
-</code></pre></div>
-<h3 id="ctas-command">CTAS Command</h3>
-<div class="highlight"><pre><code class="language-text" data-lang="text">0: jdbc:drill:zk=local> create table donuts_json as
-select id, type, name, ppu from dfs.`/Users/brumsby/drill/donuts.json`;
-+------------+---------------------------+
-| Fragment | Number of records written |
-+------------+---------------------------+
-| 0_0 | 1 |
-+------------+---------------------------+
-1 row selected (0.107 seconds)
-</code></pre></div>
-<h3 id="file-contents">File Contents</h3>
-<div class="highlight"><pre><code class="language-text" data-lang="text">administorsmbp7:tmp brumsby$ pwd
-/tmp
-administorsmbp7:tmp brumsby$ cd donuts_json
-administorsmbp7:donuts_json brumsby$ more 0_0_0.json
-{
- "id" : "0001",
- "type" : "donut",
- "name" : "Cake",
- "ppu" : 0.55
-}
-</code></pre></div>
-<h3 id="query-against-new-table">Query Against New Table</h3>
-<div class="highlight"><pre><code class="language-text" data-lang="text">0: jdbc:drill:zk=local> select * from donuts_json;
-+------------+------------+------------+------------+
-| id | type | name | ppu |
-+------------+------------+------------+------------+
-| 0001 | donut | Cake | 0.55 |
-+------------+------------+------------+------------+
-1 row selected (0.053 seconds)
-</code></pre></div>
-<h3 id="use-a-different-output-format">Use a Different Output Format</h3>
-
-<p>You can run the same sequence again with a different storage format set for
-the system or session (csv or parquet). For example, if the format is set to
-csv, and you name the table donuts_csv, the resulting file would look like
-this:</p>
-<div class="highlight"><pre><code class="language-text" data-lang="text">administorsmbp7:tmp brumsby$ cd donuts_csv
-administorsmbp7:donuts_csv brumsby$ ls
-0_0_0.csv
-administorsmbp7:donuts_csv brumsby$ more 0_0_0.csv
-id,type,name,ppu
-0001,donut,Cake,0.55
-</code></pre></div>
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- <li class="toctree-l3"><a class="reference internal" href="/docs/installing-the-driver-on-linux/">Installing the Driver on Linux</a></li>
-
- <li class="toctree-l3"><a class="reference internal" href="/docs/installing-the-driver-on-mac-os-x/">Installing the Driver on Mac OS X</a></li>
-
- <li class="toctree-l3"><a class="reference internal" href="/docs/configuring-connections-on-linux-and-mac-os-x/">Configuring Connections on Linux and Mac OS X</a></li>
-
- <li class="toctree-l3"><a class="reference internal" href="/docs/driver-configuration-options/">Driver Configuration Options</a></li>
-
- <li class="toctree-l3"><a class="reference internal" href="/docs/using-a-connection-string/">Using a Connection String</a></li>
-
- <li class="toctree-l3"><a class="reference internal" href="/docs/advanced-properties/">Advanced Properties</a></li>
-
- <li class="toctree-l3"><a class="reference internal" href="/docs/testing-the-odbc-connection/">Testing the ODBC Connection</a></li>
-
- </ul>
-
-
-
- <li class="toctree-l2"><a href="javascript: void(0);">Using ODBC on Windows</a></li>
- <ul style="display: none">
-
- <li class="toctree-l3"><a class="reference internal" href="/docs/installing-the-driver-on-windows/">Installing the Driver on Windows</a></li>
-
- <li class="toctree-l3"><a class="reference internal" href="/docs/configuring-connections-on-windows/">Configuring Connections on Windows</a></li>
-
- <li class="toctree-l3"><a class="reference internal" href="/docs/connecting-to-odbc-data-sources/">Connecting to ODBC Data Sources</a></li>
-
- <li class="toctree-l3"><a class="reference internal" href="/docs/tableau-examples/">Tableau Examples</a></li>
-
- <li class="toctree-l3"><a class="reference internal" href="/docs/using-drill-explorer-on-windows/">Using Drill Explorer on Windows</a></li>
-
- </ul>
-
-
-
- <li class="toctree-l2"><a class="reference internal" href="/docs/using-microstrategy-analytics-with-drill/">Using MicroStrategy Analytics with Drill</a></li>
-
-
-
- <li class="toctree-l2"><a class="reference internal" href="/docs/using-apache-drill-with-tibco-spotfire-desktop/">Using Apache Drill with Tibco Spotfire Desktop</a></li>
-
-
- </ul>
-
-
-
- <li class="toctree-l1"><a href="javascript: void(0);">Query Data</a></li>
- <ul style="display: none">
-
-
- <li class="toctree-l2"><a class="reference internal" href="/docs/query-data-introduction/">Query Data Introduction</a></li>
-
-
-
- <li class="toctree-l2"><a href="javascript: void(0);">Querying a File System</a></li>
- <ul style="display: none">
-
- <li class="toctree-l3"><a class="reference internal" href="/docs/querying-a-file-system-introduction/">Querying a File System Introduction</a></li>
-
- <li class="toctree-l3"><a class="reference internal" href="/docs/querying-json-files/">Querying JSON Files</a></li>
-
- <li class="toctree-l3"><a class="reference internal" href="/docs/querying-parquet-files/">Querying Parquet Files</a></li>
-
- <li class="toctree-l3"><a class="reference internal" href="/docs/querying-plain-text-files/">Querying Plain Text Files</a></li>
-
- <li class="toctree-l3"><a class="reference internal" href="/docs/querying-directories/">Querying Directories</a></li>
-
- </ul>
-
-
-
- <li class="toctree-l2"><a class="reference internal" href="/docs/querying-hbase/">Querying HBase</a></li>
-
-
-
- <li class="toctree-l2"><a href="javascript: void(0);">Querying Complex Data</a></li>
- <ul style="display: none">
-
- <li class="toctree-l3"><a class="reference internal" href="/docs/querying-complex-data-introduction/">Querying Complex Data Introduction</a></li>
-
- <li class="toctree-l3"><a class="reference internal" href="/docs/sample-data-donuts/">Sample Data: Donuts</a></li>
-
- <li class="toctree-l3"><a class="reference internal" href="/docs/selecting-flat-data/">Selecting Flat Data</a></li>
-
- <li class="toctree-l3"><a class="reference internal" href="/docs/using-sql-functions-clauses-and-joins/">Using SQL Functions, Clauses, and Joins</a></li>
-
- <li class="toctree-l3"><a class="reference internal" href="/docs/selecting-nested-data-for-a-column/">Selecting Nested Data for a Column</a></li>
-
- <li class="toctree-l3"><a class="reference internal" href="/docs/selecting-multiple-columns-within-nested-data/">Selecting Multiple Columns Within Nested Data</a></li>
-
- </ul>
-
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- <li class="toctree-l2"><a class="reference internal" href="/docs/querying-hive/">Querying Hive</a></li>
-
-
-
- <li class="toctree-l2"><a class="reference internal" href="/docs/querying-the-information-schema/">Querying the INFORMATION SCHEMA</a></li>
-
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- <li class="toctree-l2"><a class="reference internal" href="/docs/querying-system-tables/">Querying System Tables</a></li>
-
-
-
- <li class="toctree-l2"><a class="reference internal" href="/docs/monitoring-and-canceling-queries-in-the-drill-web-ui/">Monitoring and Canceling Queries in the Drill Web UI</a></li>
-
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- </ul>
-
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- <ul style="display: none">
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-
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-
- <li class="toctree-l3"><a class="reference internal" href="/docs/date-time-and-timestamp/">Date, Time, and Timestamp</a></li>
-
- <li class="toctree-l3"><a class="reference internal" href="/docs/handling-different-data-types/">Handling Different Data Types</a></li>
-
- </ul>
-
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- <li class="toctree-l2"><a class="reference internal" href="/docs/lexical-structure/">Lexical Structure</a></li>
-
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-
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-
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-
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-
- <li class="toctree-l3"><a class="reference internal" href="/docs/date-time-functions-and-arithmetic/">Date/Time Functions and Arithmetic</a></li>
-
- <li class="toctree-l3"><a class="reference internal" href="/docs/string-manipulation/">String Manipulation</a></li>
-
- <li class="toctree-l3"><a class="reference internal" href="/docs/aggregate-and-aggregate-statistical/">Aggregate and Aggregate Statistical</a></li>
-
- <li class="toctree-l3"><a class="reference internal" href="/docs/functions-for-handling-nulls/">Functions for Handling Nulls</a></li>
-
- </ul>
-
-
-
- <li class="toctree-l2"><a href="javascript: void(0);">Nested Data Functions</a></li>
- <ul style="display: none">
-
- <li class="toctree-l3"><a class="reference internal" href="/docs/nested-data-limitations/">Nested Data Limitations</a></li>
-
- <li class="toctree-l3"><a class="reference internal" href="/docs/flatten/">FLATTEN</a></li>
-
- <li class="toctree-l3"><a class="reference internal" href="/docs/kvgen/">KVGEN</a></li>
-
- <li class="toctree-l3"><a class="reference internal" href="/docs/repeated-count/">REPEATED_COUNT</a></li>
-
- <li class="toctree-l3"><a class="reference internal" href="/docs/repeated-contains/">REPEATED_CONTAINS</a></li>
-
- </ul>
-
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-
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-
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- <ul style="display: none">
-
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-
- <li class="toctree-l3"><a class="reference internal" href="/docs/alter-session-command/">ALTER SESSION Command</a></li>
-
- <li class="toctree-l3"><a class="reference internal" href="/docs/alter-system-command/">ALTER SYSTEM Command</a></li>
-
- <li class="toctree-l3"><a class="reference internal" href="/docs/create-table-as-ctas-command/">CREATE TABLE AS (CTAS) command</a></li>
-
- <li class="toctree-l3"><a class="reference internal" href="/docs/create-view-command/">CREATE VIEW command</a></li>
-
- <li class="toctree-l3"><a class="reference internal" href="/docs/describe-command/">DESCRIBE Command</a></li>
-
- <li class="toctree-l3"><a class="reference internal" href="/docs/explain-commands/">EXPLAIN commands</a></li>
-
- <li class="toctree-l3"><a class="reference internal" href="/docs/select-statements/">SELECT Statements</a></li>
-
- <li class="toctree-l3"><a class="reference internal" href="/docs/show-databases-and-show-schemas-command/">SHOW DATABASES AND SHOW SCHEMAS Command</a></li>
-
- <li class="toctree-l3"><a class="reference internal" href="/docs/show-files-command/">SHOW FILES Command</a></li>
-
- <li class="toctree-l3"><a class="reference internal" href="/docs/show-tables-command/">SHOW TABLES Command</a></li>
-
- <li class="toctree-l3"><a class="reference internal" href="/docs/use-command/">USE Command</a></li>
-
- </ul>
-
-
-
- <li class="toctree-l2"><a href="javascript: void(0);">SQL Conditional Expressions</a></li>
- <ul style="display: none">
-
- <li class="toctree-l3"><a class="reference internal" href="/docs/case/">CASE</a></li>
-
- </ul>
-
-
-
- <li class="toctree-l2"><a class="reference internal" href="/docs/reserved-keywords/">Reserved Keywords</a></li>
-
-
-
- <li class="toctree-l2"><a class="reference internal" href="/docs/sql-extensions/">SQL Extensions</a></li>
-
-
- </ul>
-
-
-
- <li class="toctree-l1"><a href="javascript: void(0);">Data Sources and File Formats</a></li>
- <ul style="display: none">
-
-
- <li class="toctree-l2"><a class="reference internal" href="/docs/data-sources-and-file-formats-introduction/">Data Sources and File Formats Introduction</a></li>
-
-
-
- <li class="toctree-l2"><a class="reference internal" href="/docs/hive-to-drill-data-type-mapping/">Hive-to-Drill Data Type Mapping</a></li>
-
-
-
- <li class="toctree-l2"><a class="reference internal" href="/docs/deploying-and-using-a-hive-udf/">Deploying and Using a Hive UDF</a></li>
-
-
-
- <li class="toctree-l2"><a class="reference internal" href="/docs/parquet-format/">Parquet Format</a></li>
-
-
-
- <li class="toctree-l2"><a class="reference internal" href="/docs/json-data-model/">JSON Data Model</a></li>
-
-
- </ul>
-
-
-
- <li class="toctree-l1"><a href="javascript: void(0);">Develop Custom Functions</a></li>
- <ul style="display: none">
-
-
- <li class="toctree-l2"><a class="reference internal" href="/docs/develop-custom-functions-introduction/">Develop Custom Functions Introduction</a></li>
-
-
-
- <li class="toctree-l2"><a class="reference internal" href="/docs/develop-a-simple-function/">Develop a Simple Function</a></li>
-
-
-
- <li class="toctree-l2"><a class="reference internal" href="/docs/developing-an-aggregate-function/">Developing an Aggregate Function</a></li>
-
-
-
- <li class="toctree-l2"><a class="reference internal" href="/docs/adding-custom-functions-to-drill/">Adding Custom Functions to Drill</a></li>
-
-
-
- <li class="toctree-l2"><a class="reference internal" href="/docs/using-custom-functions-in-queries/">Using Custom Functions in Queries</a></li>
-
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- <li class="toctree-l2"><a class="reference internal" href="/docs/custom-function-interfaces/">Custom Function Interfaces</a></li>
-
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- <li class="toctree-l3"><a class="reference internal" href="/docs/compiling-drill-from-source/">Compiling Drill from Source</a></li>
-
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-
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- <li class="toctree-l3"><a class="reference internal" href="/docs/apache-drill-contribution-guidelines/">Apache Drill Contribution Guidelines</a></li>
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- <li><a href="/docs/learn-drill-with-the-mapr-sandbox/">Learn Drill with the MapR Sandbox</a></li>
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-</nav>
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- <div class="main-content">
-
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- <a class="edit-link" href="https://github.com/apache/drill/blob/gh-pages/_docs/tutorials/learn-drill-with-the-mapr-sandbox/040-lesson-2-run-queries-with-ansi-sql.md" target="_blank"><i class="fa fa-pencil-square-o"></i></a>
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- <div class="int_title">
- <h1>Lession 2: Run Queries with ANSI SQL</h1>
-
- </div>
-
- <link href="/css/docpage.css" rel="stylesheet" type="text/css">
-
- <div class="int_text" align="left">
-
- <h2 id="goal">Goal</h2>
-
-<p>This lesson shows how to do some standard SQL analysis in Apache Drill: for
-example, summarizing data by using simple aggregate functions and connecting
-data sources by using joins. Note that Apache Drill provides ANSI SQL support,
-not a \u201cSQL-like\u201d interface.</p>
-
-<h2 id="queries-in-this-lesson">Queries in This Lesson</h2>
-
-<p>Now that you know what the data sources look like in their raw form, using
-select * queries, try running some simple but more useful queries on each data
-source. These queries demonstrate how Drill supports ANSI SQL constructs and
-also how you can combine data from different data sources in a single SELECT
-statement.</p>
-
-<ul>
-<li>Show an aggregate query on a single file or table. Use GROUP BY, WHERE, HAVING, and ORDER BY clauses.</li>
-<li>Perform joins between Hive, MapR-DB, and file system data sources.</li>
-<li>Use table and column aliases.</li>
-<li>Create a Drill view.</li>
-</ul>
-
-<h2 id="aggregation">Aggregation</h2>
-
-<h3 id="set-the-schema-to-hive:">Set the schema to hive:</h3>
-<div class="highlight"><pre><code class="language-text" data-lang="text">0: jdbc:drill:> use hive;
-+------------+------------+
-| ok | summary |
-+------------+------------+
-| true | Default schema changed to 'hive' |
-+------------+------------+
-1 row selected
-</code></pre></div>
-<h3 id="return-sales-totals-by-month:">Return sales totals by month:</h3>
-<div class="highlight"><pre><code class="language-text" data-lang="text">0: jdbc:drill:> select `month`, sum(order_total)
-from orders group by `month` order by 2 desc;
-+------------+------------+
-| month | EXPR$1 |
-+------------+------------+
-| June | 950481 |
-| May | 947796 |
-| March | 836809 |
-| April | 807291 |
-| July | 757395 |
-| October | 676236 |
-| August | 572269 |
-| February | 532901 |
-| September | 373100 |
-| January | 346536 |
-+------------+------------+
-</code></pre></div>
-<p>Drill supports SQL aggregate functions such as SUM, MAX, AVG, and MIN.
-Standard SQL clauses work in the same way in Drill queries as in relational
-database queries.</p>
-
-<p>Note that back ticks are required for the \u201cmonth\u201d column only because \u201cmonth\u201d
-is a reserved word in SQL.</p>
-
-<h3 id="return-the-top-20-sales-totals-by-month-and-state:">Return the top 20 sales totals by month and state:</h3>
-<div class="highlight"><pre><code class="language-text" data-lang="text">0: jdbc:drill:> select `month`, state, sum(order_total) as sales from orders group by `month`, state
-order by 3 desc limit 20;
-+------------+------------+------------+
-| month | state | sales |
-+------------+------------+------------+
-| May | ca | 119586 |
-| June | ca | 116322 |
-| April | ca | 101363 |
-| March | ca | 99540 |
-| July | ca | 90285 |
-| October | ca | 80090 |
-| June | tx | 78363 |
-| May | tx | 77247 |
-| March | tx | 73815 |
-| August | ca | 71255 |
-| April | tx | 68385 |
-| July | tx | 63858 |
-| February | ca | 63527 |
-| June | fl | 62199 |
-| June | ny | 62052 |
-| May | fl | 61651 |
-| May | ny | 59369 |
-| October | tx | 55076 |
-| March | fl | 54867 |
-| March | ny | 52101 |
-+------------+------------+------------+
-20 rows selected
-</code></pre></div>
-<p>Note the alias for the result of the SUM function. Drill supports column
-aliases and table aliases.</p>
-
-<h2 id="having-clause">HAVING Clause</h2>
-
-<p>This query uses the HAVING clause to constrain an aggregate result.</p>
-
-<h3 id="set-the-workspace-to-dfs.clicks">Set the workspace to dfs.clicks</h3>
-<div class="highlight"><pre><code class="language-text" data-lang="text">0: jdbc:drill:> use dfs.clicks;
-+------------+------------+
-| ok | summary |
-+------------+------------+
-| true | Default schema changed to 'dfs.clicks' |
-+------------+------------+
-1 row selected
-</code></pre></div>
-<h3 id="return-total-number-of-clicks-for-devices-that-indicate-high-click-throughs:">Return total number of clicks for devices that indicate high click-throughs:</h3>
-<div class="highlight"><pre><code class="language-text" data-lang="text">0: jdbc:drill:> select t.user_info.device, count(*) from `clicks/clicks.json` t
-group by t.user_info.device
-having count(*) > 1000;
-+------------+------------+
-| EXPR$0 | EXPR$1 |
-+------------+------------+
-| IOS5 | 11814 |
-| AOS4.2 | 5986 |
-| IOS6 | 4464 |
-| IOS7 | 3135 |
-| AOS4.4 | 1562 |
-| AOS4.3 | 3039 |
-+------------+------------+
-</code></pre></div>
-<p>The aggregate is a count of the records for each different mobile device in
-the clickstream data. Only the activity for the devices that registered more
-than 1000 transactions qualify for the result set.</p>
-
-<h2 id="union-operator">UNION Operator</h2>
-
-<p>Use the same workspace as before (dfs.clicks).</p>
-
-<h3 id="combine-clicks-activity-from-before-and-after-the-marketing-campaign">Combine clicks activity from before and after the marketing campaign</h3>
-<div class="highlight"><pre><code class="language-text" data-lang="text">0: jdbc:drill:> select t.trans_id transaction, t.user_info.cust_id customer from `clicks/clicks.campaign.json` t
-union all
-select u.trans_id, u.user_info.cust_id from `clicks/clicks.json` u limit 5;
-+-------------+------------+
-| transaction | customer |
-+-------------+------------+
-| 35232 | 18520 |
-| 31995 | 17182 |
-| 35760 | 18228 |
-| 37090 | 17015 |
-| 37838 | 18737 |
-+-------------+------------+
-</code></pre></div>
-<p>This UNION ALL query returns rows that exist in two files (and includes any
-duplicate rows from those files): <code>clicks.campaign.json</code> and <code>clicks.json</code>.</p>
-
-<h2 id="subqueries">Subqueries</h2>
-
-<h3 id="set-the-workspace-to-hive:">Set the workspace to hive:</h3>
-<div class="highlight"><pre><code class="language-text" data-lang="text">0: jdbc:drill:> use hive;
-+------------+------------+
-| ok | summary |
-+------------+------------+
-| true | Default schema changed to 'hive' |
-+------------+------------+
-</code></pre></div>
-<h3 id="compare-order-totals-across-states:">Compare order totals across states:</h3>
-<div class="highlight"><pre><code class="language-text" data-lang="text">0: jdbc:drill:> select o1.cust_id, sum(o1.order_total) as ny_sales,
-(select sum(o2.order_total) from hive.orders o2
-where o1.cust_id=o2.cust_id and state='ca') as ca_sales
-from hive.orders o1 where o1.state='ny' group by o1.cust_id
-order by cust_id limit 20;
-+------------+------------+------------+
-| cust_id | ny_sales | ca_sales |
-+------------+------------+------------+
-| 1001 | 72 | 47 |
-| 1002 | 108 | 198 |
-| 1003 | 83 | null |
-| 1004 | 86 | 210 |
-| 1005 | 168 | 153 |
-| 1006 | 29 | 326 |
-| 1008 | 105 | 168 |
-| 1009 | 443 | 127 |
-| 1010 | 75 | 18 |
-| 1012 | 110 | null |
-| 1013 | 19 | null |
-| 1014 | 106 | 162 |
-| 1015 | 220 | 153 |
-| 1016 | 85 | 159 |
-| 1017 | 82 | 56 |
-| 1019 | 37 | 196 |
-| 1020 | 193 | 165 |
-| 1022 | 124 | null |
-| 1023 | 166 | 149 |
-| 1024 | 233 | null |
-+------------+------------+------------+
-</code></pre></div>
-<p>This example demonstrates Drill support for correlated subqueries. This query
-uses a subquery in the select list and correlates the result of the subquery
-with the outer query, using the cust_id column reference. The subquery returns
-the sum of order totals for California, and the outer query returns the
-equivalent sum, for the same cust_id, for New York.</p>
-
-<p>The result set is sorted by the cust_id and presents the sales totals side by
-side for easy comparison. Null values indicate customer IDs that did not
-register any sales in that state.</p>
-
-<h2 id="cast-function">CAST Function</h2>
-
-<h3 id="use-the-maprdb-workspace:">Use the maprdb workspace:</h3>
-<div class="highlight"><pre><code class="language-text" data-lang="text">0: jdbc:drill:> use maprdb;
-+------------+------------+
-| ok | summary |
-+------------+------------+
-| true | Default schema changed to 'maprdb' |
-+------------+------------+
-1 row selected
-</code></pre></div>
-<h3 id="return-customer-data-with-appropriate-data-types">Return customer data with appropriate data types</h3>
-<div class="highlight"><pre><code class="language-text" data-lang="text">0: jdbc:drill:> select cast(row_key as int) as cust_id, cast(t.personal.name as varchar(20)) as name,
-cast(t.personal.gender as varchar(10)) as gender, cast(t.personal.age as varchar(10)) as age,
-cast(t.address.state as varchar(4)) as state, cast(t.loyalty.agg_rev as dec(7,2)) as agg_rev,
-cast(t.loyalty.membership as varchar(20)) as membership
-from customers t limit 5;
-+------------+------------+------------+------------+------------ +------------+------------+
-| cust_id | name | gender | age | state | agg_rev | membership |
-+------------+------------+------------+------------+------------+------------+------------+
-| 10001 | "Corrine Mecham" | "FEMALE" | "15-20" | "va" | 197.00 | "silver" |
-| 10005 | "Brittany Park" | "MALE" | "26-35" | "in" | 230.00 | "silver" |
-| 10006 | "Rose Lokey" | "MALE" | "26-35" | "ca" | 250.00 | "silver" |
-| 10007 | "James Fowler" | "FEMALE" | "51-100" | "me" | 263.00 | "silver" |
-| 10010 | "Guillermo Koehler" | "OTHER" | "51-100" | "mn" | 202.00 | "silver" |
-+------------+------------+------------+------------+------------+------------+------------+
-5 rows selected
-</code></pre></div>
-<p>Note the following features of this query:</p>
-
-<ul>
-<li>The CAST function is required for every column in the table. This function returns the MapR-DB/HBase binary data as readable integers and strings. Alternatively, you can use CONVERT_TO/CONVERT_FROM functions to decode the string columns. CONVERT_TO/CONVERT_FROM are more efficient than CAST in most cases. Use only CONVERT_TO to convert binary types to any type other than VARCHAR.</li>
-<li>The row_key column functions as the primary key of the table (a customer ID in this case).</li>
-<li>The table alias t is required; otherwise the column family names would be parsed as table names and the query would return an error.</li>
-</ul>
-
-<h3 id="remove-the-quotes-from-the-strings:">Remove the quotes from the strings:</h3>
-
-<p>You can use the regexp_replace function to remove the quotes around the
-strings in the query results. For example, to return a state name va instead
-of \u201cva\u201d:</p>
-<div class="highlight"><pre><code class="language-text" data-lang="text">0: jdbc:drill:> select cast(row_key as int), regexp_replace(cast(t.address.state as varchar(10)),'"','')
-from customers t limit 1;
-+------------+------------+
-| EXPR$0 | EXPR$1 |
-+------------+------------+
-| 10001 | va |
-+------------+------------+
-1 row selected
-</code></pre></div>
-<h2 id="create-view-command">CREATE VIEW Command</h2>
-<div class="highlight"><pre><code class="language-text" data-lang="text">0: jdbc:drill:> use dfs.views;
-+------------+------------+
-| ok | summary |
-+------------+------------+
-| true | Default schema changed to 'dfs.views' |
-+------------+------------+
-</code></pre></div>
-<h3 id="use-a-mutable-workspace:">Use a mutable workspace:</h3>
-
-<p>A mutable (or writable) workspace is a workspace that is enabled for \u201cwrite\u201d
-operations. This attribute is part of the storage plugin configuration. You
-can create Drill views and tables in mutable workspaces.</p>
-
-<h3 id="create-a-view-on-a-mapr-db-table">Create a view on a MapR-DB table</h3>
-<div class="highlight"><pre><code class="language-text" data-lang="text">0: jdbc:drill:> create or replace view custview as select cast(row_key as int) as cust_id,
-cast(t.personal.name as varchar(20)) as name,
-cast(t.personal.gender as varchar(10)) as gender,
-cast(t.personal.age as varchar(10)) as age,
-cast(t.address.state as varchar(4)) as state,
-cast(t.loyalty.agg_rev as dec(7,2)) as agg_rev,
-cast(t.loyalty.membership as varchar(20)) as membership
-from maprdb.customers t;
-+------------+------------+
-| ok | summary |
-+------------+------------+
-| true | View 'custview' replaced successfully in 'dfs.views' schema |
-+------------+------------+
-1 row selected
-</code></pre></div>
-<p>Drill provides CREATE OR REPLACE VIEW syntax similar to relational databases
-to create views. Use the OR REPLACE option to make it easier to update the
-view later without having to remove it first. Note that the FROM clause in
-this example must refer to maprdb.customers. The MapR-DB tables are not
-directly visible to the dfs.views workspace.</p>
-
-<p>Unlike a traditional database where views typically are DBA/developer-driven
-operations, file system-based views in Drill are very lightweight. A view is
-simply a special file with a specific extension (.drill). You can store views
-even in your local file system or point to a specific workspace. You can
-specify any query against any Drill data source in the body of the CREATE VIEW
-statement.</p>
-
-<p>Drill provides a decentralized metadata model. Drill is able to query metadata
-defined in data sources such as Hive, HBase, and the file system. Drill also
-supports the creation of metadata in the file system.</p>
-
-<h3 id="query-data-from-the-view:">Query data from the view:</h3>
-<div class="highlight"><pre><code class="language-text" data-lang="text">0: jdbc:drill:> select * from custview limit 1;
-+------------+------------+------------+------------+------------+------------+------------+
-| cust_id | name | gender | age | state | agg_rev | membership |
-+------------+------------+------------+------------+------------+------------+------------+
-| 10001 | "Corrine Mecham" | "FEMALE" | "15-20" | "va" | 197.00 | "silver" |
-+------------+------------+------------+------------+------------+------------+------------+
-</code></pre></div>
-<p>Once the users get an idea on what data is available by exploring it directly
-from file system , views can be used as a way to take the data in downstream
-tools like Tableau, Microstrategy etc for downstream analysis and
-visualization. For these tools, a view appears simply as a \u201ctable\u201d with
-selectable \u201ccolumns\u201d in it.</p>
-
-<h2 id="query-across-data-sources">Query Across Data Sources</h2>
-
-<p>Continue using <code>dfs.views</code> for this query.</p>
-
-<h3 id="join-the-customers-view-and-the-orders-table:">Join the customers view and the orders table:</h3>
-<div class="highlight"><pre><code class="language-text" data-lang="text">0: jdbc:drill:> select membership, sum(order_total) as sales from hive.orders, custview
-where orders.cust_id=custview.cust_id
-group by membership order by 2;
-+------------+------------+
-| membership | sales |
-+------------+------------+
-| "basic" | 380665 |
-| "silver" | 708438 |
-| "gold" | 2787682 |
-+------------+------------+
-3 rows selected
-</code></pre></div>
-<p>In this query, we are reading data from a MapR-DB table (represented by
-custview) and combining it with the order information in Hive. When doing
-cross data source queries such as this, you need to use fully qualified
-table/view names. For example, the orders table is prefixed by \u201chive,\u201d which
-is the storage plugin name registered with Drill. We are not using any prefix
-for \u201ccustview\u201d because we explicitly switched the dfs.views workspace where
-custview is stored.</p>
-
-<p>Note: If the results of any of your queries appear to be truncated because the
-rows are wide, set the maximum width of the display to 10000:</p>
-
-<p>Do not use a semicolon for this SET command.</p>
-
-<h3 id="join-the-customers,-orders,-and-clickstream-data:">Join the customers, orders, and clickstream data:</h3>
-<div class="highlight"><pre><code class="language-text" data-lang="text">0: jdbc:drill:> select custview.membership, sum(orders.order_total) as sales from hive.orders, custview,
-dfs.`/mapr/demo.mapr.com/data/nested/clicks/clicks.json` c
-where orders.cust_id=custview.cust_id and orders.cust_id=c.user_info.cust_id
-group by custview.membership order by 2;
-+------------+------------+
-| membership | sales |
-+------------+------------+
-| "basic" | 372866 |
-| "silver" | 728424 |
-| "gold" | 7050198 |
-+------------+------------+
-3 rows selected
-</code></pre></div>
-<p>This three-way join selects from three different data sources in one query:</p>
-
-<ul>
-<li>hive.orders table</li>
-<li>custview (a view of the HBase customers table)</li>
-<li>clicks.json file</li>
-</ul>
-
-<p>The join column for both sets of join conditions is the cust_id column. The
-views workspace is used for this query so that custview can be accessed. The
-hive.orders table is also visible to the query.</p>
-
-<p>However, note that the JSON file is not directly visible from the views
-workspace, so the query specifies the full path to the file:</p>
-<div class="highlight"><pre><code class="language-text" data-lang="text">dfs.`/mapr/demo.mapr.com/data/nested/clicks/clicks.json`
-</code></pre></div>
-<h2 id="what's-next">What's Next</h2>
-
-<p>Go to <a href="/docs/lession-3-run-queries-on-complex-data-types">Lesson 3: Run Queries on Complex Data Types</a>. </p>
-
-
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- <li class="toctree-l3"><a class="reference internal" href="/docs/embedded-mode-prerequisites/">Embedded Mode Prerequisites</a></li>
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- <li class="toctree-l3"><a class="reference internal" href="/docs/installing-drill-on-linux-and-mac-os-x/">Installing Drill on Linux and Mac OS X</a></li>
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- <li class="toctree-l3"><a class="reference internal" href="/docs/starting-drill-on-linux-and-mac-os-x/">Starting Drill on Linux and Mac OS X</a></li>
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- <li class="toctree-l3"><a class="reference internal" href="/docs/installing-drill-on-windows/">Installing Drill on Windows</a></li>
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- <li class="toctree-l3"><a class="reference internal" href="/docs/starting-drill-on-windows/">Starting Drill on Windows</a></li>
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- </ul>
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- <li class="toctree-l2"><a href="javascript: void(0);">Installing Drill in Distributed Mode</a></li>
- <ul style="display: none">
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- <li class="toctree-l3"><a class="reference internal" href="/docs/distributed-mode-prerequisites/">Distributed Mode Prerequisites</a></li>
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- <li class="toctree-l3"><a class="reference internal" href="/docs/installing-drill-on-the-cluster/">Installing Drill on the Cluster</a></li>
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- <li class="toctree-l3"><a class="reference internal" href="/docs/starting-drill-in-distributed-mode/">Starting Drill in Distributed Mode</a></li>
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- </ul>
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-
- </ul>
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- <li class="toctree-l1"><a href="javascript: void(0);">Configure Drill</a></li>
- <ul style="display: none">
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-
- <li class="toctree-l2"><a class="reference internal" href="/docs/configure-drill-introduction/">Configure Drill Introduction</a></li>
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-
-
- <li class="toctree-l2"><a class="reference internal" href="/docs/configuring-drill-memory/">Configuring Drill Memory</a></li>
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-
- <li class="toctree-l2"><a href="javascript: void(0);">Configuring a Multitenant Cluster</a></li>
- <ul style="display: none">
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- <li class="toctree-l3"><a class="reference internal" href="/docs/configuring-a-multitenant-cluster-introduction/">Configuring a Multitenant Cluster Introduction</a></li>
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- <li class="toctree-l3"><a class="reference internal" href="/docs/configuring-multitenant-resources/">Configuring Multitenant Resources</a></li>
-
- <li class="toctree-l3"><a class="reference internal" href="/docs/configuring-resources-for-a-shared-drillbit/">Configuring Resources for a Shared Drillbit</a></li>
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- </ul>
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-
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- <li class="toctree-l2"><a class="reference internal" href="/docs/configuring-user-impersonation/">Configuring User Impersonation</a></li>
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- <li class="toctree-l2"><a class="reference internal" href="/docs/configuring-user-authentication/">Configuring User Authentication</a></li>
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- <li class="toctree-l2"><a href="javascript: void(0);">Configuration Options</a></li>
- <ul style="display: none">
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- <li class="toctree-l3"><a class="reference internal" href="/docs/configuration-options-introduction/">Configuration Options Introduction</a></li>
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- <li class="toctree-l3"><a class="reference internal" href="/docs/start-up-options/">Start-Up Options</a></li>
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- <li class="toctree-l3"><a class="reference internal" href="/docs/planning-and-execution-options/">Planning and Execution Options</a></li>
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- <li class="toctree-l3"><a class="reference internal" href="/docs/persistent-configuration-storage/">Persistent Configuration Storage</a></li>
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- </ul>
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- <li class="toctree-l2"><a class="reference internal" href="/docs/ports-used-by-drill/">Ports Used by Drill</a></li>
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-
- <li class="toctree-l2"><a class="reference internal" href="/docs/configuring-the-drill-shell/">Configuring the Drill Shell</a></li>
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-
- </ul>
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-
- <li class="toctree-l1"><a href="javascript: void(0);">Connect a Data Source</a></li>
- <ul style="display: none">
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- <li class="toctree-l2"><a class="reference internal" href="/docs/connect-a-data-source-introduction/">Connect a Data Source Introduction</a></li>
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- <li class="toctree-l2"><a class="reference internal" href="/docs/storage-plugin-registration/">Storage Plugin Registration</a></li>
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- <li class="toctree-l2"><a href="javascript: void(0);">Storage Plugin Configuration</a></li>
- <ul style="display: none">
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- <li class="toctree-l3"><a class="reference internal" href="/docs/plugin-configuration-basics/">Plugin Configuration Basics</a></li>
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- <li class="toctree-l3"><a class="reference internal" href="/docs/file-system-storage-plugin/">File System Storage Plugin</a></li>
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- <li class="toctree-l3"><a class="reference internal" href="/docs/workspaces/">Workspaces</a></li>
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- <li class="toctree-l3"><a class="reference internal" href="/docs/hbase-storage-plugin/">HBase Storage Plugin</a></li>
-
- <li class="toctree-l3"><a class="reference internal" href="/docs/hive-storage-plugin/">Hive Storage Plugin</a></li>
-
- <li class="toctree-l3"><a class="reference internal" href="/docs/drill-default-input-format/">Drill Default Input Format</a></li>
-
- </ul>
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-
-
- <li class="toctree-l2"><a class="reference internal" href="/docs/mongodb-plugin-for-apache-drill/">MongoDB Plugin for Apache Drill</a></li>
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-
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- <li class="toctree-l2"><a class="reference internal" href="/docs/mapr-db-format/">MapR-DB Format</a></li>
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-
- </ul>
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- <li class="toctree-l1 current_section "><a href="javascript: void(0);">ODBC/JDBC Interfaces</a></li>
- <ul class="current_section">
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- <li class="toctree-l2"><a class="reference internal" href="/docs/interfaces-introduction/">Interfaces Introduction</a></li>
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- <li class="toctree-l2"><a class="reference internal" href="/docs/using-jdbc-with-squirrel-on-windows/">Using JDBC with SQuirreL on Windows</a></li>
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-
- <li class="toctree-l2"><a href="javascript: void(0);">Installing the ODBC Driver</a></li>
- <ul style="display: none">
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- <li class="toctree-l3"><a class="reference internal" href="/docs/installing-the-driver-on-linux/">Installing the Driver on Linux</a></li>
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- <li class="toctree-l3"><a class="reference internal" href="/docs/installing-the-driver-on-mac-os-x/">Installing the Driver on Mac OS X</a></li>
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- <li class="toctree-l3"><a class="reference internal" href="/docs/installing-the-driver-on-windows/">Installing the Driver on Windows</a></li>
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- <li class="toctree-l3"><a class="reference internal" href="/docs/installing-the-tdc-file-on-windows/">Installing the TDC File on Windows</a></li>
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- </ul>
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-
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- <li class="toctree-l2"><a href="javascript: void(0);">Configuring ODBC</a></li>
- <ul style="">
-
- <li class="toctree-l3"><a class="reference internal" href="/docs/odbc-configuration-reference/">ODBC Configuration Reference</a></li>
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- <li class="toctree-l3 current"><a class="reference internal" href="/docs/configuring-odbc-on-linux-mac-os-x/">Configuring ODBC on Linux/Mac OS X</a></li>
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- <li class="toctree-l3"><a class="reference internal" href="/docs/configuring-odbc-on-windows/">Configuring ODBC on Windows</a></li>
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- <li class="toctree-l3"><a class="reference internal" href="/docs/testing-the-odbc-connection/">Testing the ODBC Connection</a></li>
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- </ul>
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-
- <li class="toctree-l2"><a href="javascript: void(0);">Using Drill Explorer</a></li>
- <ul style="display: none">
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- <li class="toctree-l3"><a class="reference internal" href="/docs/drill-explorer-introduction/">Drill Explorer Introduction</a></li>
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- <li class="toctree-l3"><a class="reference internal" href="/docs/connecting-drill-explorer-to-data/">Connecting Drill Explorer to Data</a></li>
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- <li class="toctree-l3"><a class="reference internal" href="/docs/using-drill-explorer-to-browse-data/">Using Drill Explorer to Browse Data</a></li>
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- </ul>
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- <li class="toctree-l2"><a href="javascript: void(0);">Using Drill with BI Tools</a></li>
- <ul style="display: none">
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- <li class="toctree-l3"><a class="reference internal" href="/docs/using-drill-with-bi-tools-introduction/">Using Drill with BI Tools Introduction</a></li>
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- <li class="toctree-l3"><a class="reference internal" href="/docs/tableau-examples/">Tableau Examples</a></li>
-
- <li class="toctree-l3"><a class="reference internal" href="/docs/using-microstrategy-analytics-with-apache-drill/">Using MicroStrategy Analytics with Apache Drill</a></li>
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- <li class="toctree-l3"><a class="reference internal" href="/docs/using-tibco-spotfire-with-drill/">Using Tibco Spotfire with Drill</a></li>
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- <li class="toctree-l3"><a class="reference internal" href="/docs/using-apache-drill-with-tableau-9-desktop/">Using Apache Drill with Tableau 9 Desktop</a></li>
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- <li class="toctree-l3"><a class="reference internal" href="/docs/using-apache-drill-with-tableau-9-server/">Using Apache Drill with Tableau 9 Server</a></li>
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- </ul>
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-
- </ul>
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- <li class="toctree-l1"><a href="javascript: void(0);">Query Data</a></li>
- <ul style="display: none">
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-
- <li class="toctree-l2"><a class="reference internal" href="/docs/query-data-introduction/">Query Data Introduction</a></li>
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-
-
- <li class="toctree-l2"><a href="javascript: void(0);">Querying a File System</a></li>
- <ul style="display: none">
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- <li class="toctree-l3"><a class="reference internal" href="/docs/querying-a-file-system-introduction/">Querying a File System Introduction</a></li>
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- <li class="toctree-l3"><a class="reference internal" href="/docs/querying-json-files/">Querying JSON Files</a></li>
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- <li class="toctree-l3"><a class="reference internal" href="/docs/querying-parquet-files/">Querying Parquet Files</a></li>
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- <li class="toctree-l3"><a class="reference internal" href="/docs/querying-plain-text-files/">Querying Plain Text Files</a></li>
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- <li class="toctree-l3"><a class="reference internal" href="/docs/querying-directories/">Querying Directories</a></li>
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- </ul>
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- <li class="toctree-l2"><a class="reference internal" href="/docs/querying-hbase/">Querying HBase</a></li>
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- <li class="toctree-l2"><a href="javascript: void(0);">Querying Complex Data</a></li>
- <ul style="display: none">
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- <li class="toctree-l3"><a class="reference internal" href="/docs/querying-complex-data-introduction/">Querying Complex Data Introduction</a></li>
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- <li class="toctree-l3"><a class="reference internal" href="/docs/sample-data-donuts/">Sample Data: Donuts</a></li>
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- <li class="toctree-l3"><a class="reference internal" href="/docs/selecting-flat-data/">Selecting Flat Data</a></li>
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- <li class="toctree-l3"><a class="reference internal" href="/docs/using-sql-functions-clauses-and-joins/">Using SQL Functions, Clauses, and Joins</a></li>
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- <li class="toctree-l3"><a class="reference internal" href="/docs/selecting-nested-data-for-a-column/">Selecting Nested Data for a Column</a></li>
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- <li class="toctree-l3"><a class="reference internal" href="/docs/selecting-multiple-columns-within-nested-data/">Selecting Multiple Columns Within Nested Data</a></li>
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- </ul>
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-
-
- <li class="toctree-l2"><a class="reference internal" href="/docs/querying-hive/">Querying Hive</a></li>
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-
-
- <li class="toctree-l2"><a class="reference internal" href="/docs/querying-the-information-schema/">Querying the INFORMATION SCHEMA</a></li>
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- <li class="toctree-l2"><a class="reference internal" href="/docs/querying-system-tables/">Querying System Tables</a></li>
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-
-
- <li class="toctree-l2"><a class="reference internal" href="/docs/monitoring-and-canceling-queries-in-the-drill-web-ui/">Monitoring and Canceling Queries in the Drill Web UI</a></li>
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-
- </ul>
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-
-
- <li class="toctree-l1"><a href="javascript: void(0);">Performance Tuning</a></li>
- <ul style="display: none">
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-
- <li class="toctree-l2"><a class="reference internal" href="/docs/performance-tuning-introduction/">Performance Tuning Introduction</a></li>
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-
-
- <li class="toctree-l2"><a class="reference internal" href="/docs/partition-pruning/">Partition Pruning</a></li>
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-
-
- <li class="toctree-l2"><a class="reference internal" href="/docs/choosing-a-storage-format/">Choosing a Storage Format</a></li>
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-
-
- <li class="toctree-l2"><a href="javascript: void(0);">Query Plans and Tuning</a></li>
- <ul style="display: none">
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- <li class="toctree-l3"><a class="reference internal" href="/docs/query-plans-and-tuning-introduction/">Query Plans and Tuning Introduction</a></li>
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- <li class="toctree-l3"><a class="reference internal" href="/docs/join-planning-guidelines/">Join Planning Guidelines</a></li>
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- <li class="toctree-l3"><a class="reference internal" href="/docs/guidelines-for-optimizing-aggregation/">Guidelines for Optimizing Aggregation</a></li>
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- <li class="toctree-l3"><a class="reference internal" href="/docs/modifying-query-planning-options/">Modifying Query Planning Options</a></li>
-
- <li class="toctree-l3"><a class="reference internal" href="/docs/sort-based-and-hash-based-memory-constrained-operators/">Sort-Based and Hash-Based Memory-Constrained Operators</a></li>
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- <li class="toctree-l3"><a class="reference internal" href="/docs/enabling-query-queuing/">Enabling Query Queuing</a></li>
-
- <li class="toctree-l3"><a class="reference internal" href="/docs/controlling-parallelization-to-balance-performance-with-multi-tenancy/">Controlling Parallelization to Balance Performance with Multi-Tenancy</a></li>
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- </ul>
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-
-
- <li class="toctree-l2"><a href="javascript: void(0);">Identifying Performance Issues</a></li>
- <ul style="display: none">
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- <li class="toctree-l3"><a class="reference internal" href="/docs/query-plans/">Query Plans</a></li>
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- <li class="toctree-l3"><a class="reference internal" href="/docs/query-profiles/">Query Profiles</a></li>
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- </ul>
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-
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- <li class="toctree-l2"><a href="javascript: void(0);">Performance Tuning Reference</a></li>
- <ul style="display: none">
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- <li class="toctree-l3"><a class="reference internal" href="/docs/query-profile-column-descriptions/">Query Profile Column Descriptions</a></li>
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- <li class="toctree-l3"><a class="reference internal" href="/docs/physical-operators/">Physical Operators</a></li>
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- </ul>
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-
- </ul>
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- <li class="toctree-l1"><a href="javascript: void(0);">Log and Debug</a></li>
- <ul style="display: none">
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- <li class="toctree-l2"><a class="reference internal" href="/docs/log-and-debug-introduction/">Log and Debug Introduction</a></li>
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- <li class="toctree-l2"><a class="reference internal" href="/docs/error-messages/">Error Messages</a></li>
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-
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- <li class="toctree-l2"><a class="reference internal" href="/docs/modify-logback-xml/">Modify logback.xml</a></li>
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-
-
- <li class="toctree-l2"><a class="reference internal" href="/docs/review-the-java-stack-trace/">Review the Java Stack Trace</a></li>
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-
- <li class="toctree-l2"><a class="reference internal" href="/docs/query-audit-logging/">Query Audit Logging</a></li>
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-
- </ul>
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-
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- <li class="toctree-l1"><a href="javascript: void(0);">SQL Reference</a></li>
- <ul style="display: none">
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- <li class="toctree-l2"><a class="reference internal" href="/docs/sql-reference-introduction/">SQL Reference Introduction</a></li>
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- <li class="toctree-l2"><a href="javascript: void(0);">Data Types</a></li>
- <ul style="display: none">
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- <li class="toctree-l3"><a class="reference internal" href="/docs/supported-data-types/">Supported Data Types</a></li>
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- <li class="toctree-l3"><a class="reference internal" href="/docs/date-time-and-timestamp/">Date, Time, and Timestamp</a></li>
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- <li class="toctree-l3"><a class="reference internal" href="/docs/handling-different-data-types/">Handling Different Data Types</a></li>
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- </ul>
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- <li class="toctree-l2"><a class="reference internal" href="/docs/lexical-structure/">Lexical Structure</a></li>
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- <li class="toctree-l2"><a class="reference internal" href="/docs/operators/">Operators</a></li>
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- <li class="toctree-l2"><a href="javascript: void(0);">SQL Functions</a></li>
- <ul style="display: none">
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- <li class="toctree-l3"><a class="reference internal" href="/docs/about-sql-function-examples/">About SQL Function Examples</a></li>
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- <li class="toctree-l3"><a class="reference internal" href="/docs/math-and-trig/">Math and Trig</a></li>
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- <li class="toctree-l3"><a class="reference internal" href="/docs/data-type-conversion/">Data Type Conversion</a></li>
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- <li class="toctree-l3"><a class="reference internal" href="/docs/date-time-functions-and-arithmetic/">Date/Time Functions and Arithmetic</a></li>
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- <li class="toctree-l3"><a class="reference internal" href="/docs/string-manipulation/">String Manipulation</a></li>
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- <li class="toctree-l3"><a class="reference internal" href="/docs/aggregate-and-aggregate-statistical/">Aggregate and Aggregate Statistical</a></li>
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- <li class="toctree-l3"><a class="reference internal" href="/docs/functions-for-handling-nulls/">Functions for Handling Nulls</a></li>
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- </ul>
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- <li class="toctree-l2"><a href="javascript: void(0);">Nested Data Functions</a></li>
- <ul style="display: none">
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- <li class="toctree-l3"><a class="reference internal" href="/docs/nested-data-limitations/">Nested Data Limitations</a></li>
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- <li class="toctree-l3"><a class="reference internal" href="/docs/flatten/">FLATTEN</a></li>
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- <li class="toctree-l3"><a class="reference internal" href="/docs/kvgen/">KVGEN</a></li>
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- <li class="toctree-l3"><a class="reference internal" href="/docs/repeated-count/">REPEATED_COUNT</a></li>
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- <li class="toctree-l3"><a class="reference internal" href="/docs/repeated-contains/">REPEATED_CONTAINS</a></li>
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- </ul>
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- <li class="toctree-l2"><a class="reference internal" href="/docs/query-directory-functions/">Query Directory Functions</a></li>
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- <li class="toctree-l2"><a href="javascript: void(0);">SQL Commands</a></li>
- <ul style="display: none">
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- <li class="toctree-l3"><a class="reference internal" href="/docs/supported-sql-commands/">Supported SQL Commands</a></li>
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- <li class="toctree-l3"><a class="reference internal" href="/docs/alter-session/">ALTER SESSION</a></li>
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- <li class="toctree-l3"><a class="reference internal" href="/docs/alter-system/">ALTER SYSTEM</a></li>
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- <li class="toctree-l3"><a class="reference internal" href="/docs/create-table-as-ctas/">CREATE TABLE AS (CTAS)</a></li>
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- <li class="toctree-l3"><a class="reference internal" href="/docs/create-view/">CREATE VIEW</a></li>
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- <li class="toctree-l3"><a class="reference internal" href="/docs/drop-view/">DROP VIEW</a></li>
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- <li class="toctree-l3"><a class="reference internal" href="/docs/describe/">DESCRIBE</a></li>
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- <li class="toctree-l3"><a class="reference internal" href="/docs/explain/">EXPLAIN</a></li>
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- <li class="toctree-l3"><a class="reference internal" href="/docs/select/">SELECT</a></li>
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- <li class="toctree-l3"><a class="reference internal" href="/docs/select-list/">SELECT List</a></li>
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- <li class="toctree-l3"><a class="reference internal" href="/docs/from-clause/">FROM Clause</a></li>
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- <li class="toctree-l3"><a class="reference internal" href="/docs/group-by-clause/">GROUP BY Clause</a></li>
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- <li class="toctree-l3"><a class="reference internal" href="/docs/having-clause/">HAVING Clause</a></li>
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- <li class="toctree-l3"><a class="reference internal" href="/docs/limit-clause/">LIMIT Clause</a></li>
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- <li class="toctree-l3"><a class="reference internal" href="/docs/offset-clause/">OFFSET Clause</a></li>
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- <li class="toctree-l3"><a class="reference internal" href="/docs/order-by-clause/">ORDER BY Clause</a></li>
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- <li class="toctree-l3"><a class="reference internal" href="/docs/union-set-operator/">UNION Set Operator</a></li>
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- <li class="toctree-l3"><a class="reference internal" href="/docs/where-clause/">WHERE Clause</a></li>
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- <li class="toctree-l3"><a class="reference internal" href="/docs/with-clause/">WITH Clause</a></li>
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- <li class="toctree-l3"><a class="reference internal" href="/docs/show-databases-and-show-schemas/">SHOW DATABASES and SHOW SCHEMAS</a></li>
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- <li class="toctree-l3"><a class="reference internal" href="/docs/show-files/">SHOW FILES</a></li>
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- <li class="toctree-l3"><a class="reference internal" href="/docs/show-tables/">SHOW TABLES</a></li>
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- <li class="toctree-l3"><a class="reference internal" href="/docs/use/">USE</a></li>
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- <li class="toctree-l2"><a href="javascript: void(0);">SQL Conditional Expressions</a></li>
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- <li class="toctree-l3"><a class="reference internal" href="/docs/case/">CASE</a></li>
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- <li class="toctree-l2"><a class="reference internal" href="/docs/reserved-keywords/">Reserved Keywords</a></li>
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- <li class="toctree-l2"><a class="reference internal" href="/docs/sql-extensions/">SQL Extensions</a></li>
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- </ul>
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- <li class="toctree-l1"><a href="javascript: void(0);">Data Sources and File Formats</a></li>
- <ul style="display: none">
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- <li class="toctree-l2"><a class="reference internal" href="/docs/data-sources-and-file-formats-introduction/">Data Sources and File Formats Introduction</a></li>
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- <li class="toctree-l2"><a class="reference internal" href="/docs/hive-to-drill-data-type-mapping/">Hive-to-Drill Data Type Mapping</a></li>
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- <li class="toctree-l2"><a class="reference internal" href="/docs/deploying-and-using-a-hive-udf/">Deploying and Using a Hive UDF</a></li>
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- <li class="toctree-l2"><a class="reference internal" href="/docs/parquet-format/">Parquet Format</a></li>
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- <li class="toctree-l2"><a class="reference internal" href="/docs/json-data-model/">JSON Data Model</a></li>
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- </ul>
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- <li class="toctree-l1"><a href="javascript: void(0);">Develop Custom Functions</a></li>
- <ul style="display: none">
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- <li class="toctree-l2"><a class="reference internal" href="/docs/develop-custom-functions-introduction/">Develop Custom Functions Introduction</a></li>
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-
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-</nav>
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- <div class="main-content">
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- <a class="edit-link" href="https://github.com/apache/drill/blob/gh-pages/_docs/odbc-jdbc-interfaces/configuring-odbc/020-configuring-odbc-on-linux-mac-os-x.md" target="_blank"><i class="fa fa-pencil-square-o"></i></a>
-
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- <div class="int_title left">
- <h1>Configuring ODBC on Linux/Mac OS X</h1>
-
- </div>
-
- <link href="/css/docpage.css" rel="stylesheet" type="text/css">
-
- <div class="int_text" align="left">
-
- <p>ODBC driver managers use configuration files to define and configure ODBC data
-sources and drivers. To configure an ODBC connection for Linux or Mac OS X, complete the following
-steps:</p>
-
-<ul>
-<li>Step 1: Set Environment Variables (Linux only)</li>
-<li>Step 2: Define the ODBC Data Sources in odbc.ini</li>
-<li>Step 3: (Optional) Define the ODBC Driver in odbcinst.ini</li>
-<li>Step 4: Configure the MapR Drill ODBC Driver</li>
-</ul>
-
-<h2 id="sample-configuration-files">Sample Configuration Files</h2>
-
-<p>Before you connect to Drill through an ODBC client tool
-on Linux or Mac OS X, copy the following configuration files in <code>/opt/mapr/drillobdc/Setup</code> to your home directory unless the files already exist in your home directory:</p>
-
-<ul>
-<li><code>mapr.drillodbc.ini</code></li>
-<li><code>odbc.ini</code></li>
-<li><code>odbcinst.ini</code></li>
-</ul>
-
-<p>In your home directory, use sudo to rename the files as hidden files:</p>
-
-<ul>
-<li>.mapr.drillodbc.ini</li>
-<li>.odbc.ini</li>
-<li>.odbcinst.ini</li>
-</ul>
-
-<p>The installer for Mac OS X creates a sample user DSN in odbc.ini in either of the following locations:</p>
-
-<ul>
-<li>~/Library/ODBC/odbc.ini</li>
-<li>~/.odbc.ini</li>
-</ul>
-
-<p>Depending on the driver manager you use, the user DSN in one of these files will be effective.</p>
-
-<hr>
-
-<h2 id="step-1:-set-environment-variables">Step 1: Set Environment Variables</h2>
-
-<h3 id="linux">Linux</h3>
-
-<p>Set the following environment variables to point to the <code>.odbc.ini</code>
-and <code>.mapr.drillodbc.ini</code> configuration files, respectively:</p>
-
-<ul>
-<li><code>ODBCINI</code> (point to <code>.odbc.ini</code>)</li>
-<li><code>MAPRDRILLINI</code> (point to <code>.mapr.drillodbc.ini</code>)</li>
-</ul>
-
-<p>The <code>LD_LIBRARY_PATH</code> environment variable must include the paths to the
-following:</p>
-
-<ul>
-<li>Installed ODBC driver manager libraries</li>
-<li>Installed MapR ODBC Driver for Apache Drill shared libraries</li>
-</ul>
-
-<p>You can have both 32- and 64-bit versions of the driver installed at the same time on the same computer.
-<div class="admonition important">
- <p class="first admonition-title">Important</p>
- <p class="last">Do not include the paths to both 32- and 64-bit shared libraries in LD_LIBRARY PATH at the same time. </p>
-</div>
-Only include the path to the shared libraries corresponding to the driver matching the bitness of the client application used.</p>
-
-<p>For example, if you are using a 64-bit client application and ODBC driver
-manager libraries are installed in <code>/usr/local/lib</code>, then set
-<code>LD_LIBRARY_PATH</code> as follows: </p>
-
-<p><code>export LD_LIBRARY_PATH=/usr/local/lib:/opt/simba/drillodbc/lib/64</code> </p>
-
-<h3 id="mac-os-x">Mac OS X</h3>
-
-<p>Create or modify the <code>/etc/launchd.conf</code> file to set environment variables. Set the SIMBAINI variable to point to the <code>.mapr.drillodbc.ini</code> file, the ODBCSYSINI varialbe to the <code>.odbcinst.ini</code> file, the ODBCINI variable to the <code>.odbc.ini</code> file, and the DYLD_LIBRARY_PATH to the location of the dynamic linker (DYLD) libraries and to the MapR Drill ODBC Driver. If you installed the iODBC driver manager using the DMG, the DYLD libraries are installed in <code>/usr/local/iODBC/lib</code>. The launchd.conf file should look something like this:</p>
-<div class="highlight"><pre><code class="language-text" data-lang="text">setenv SIMBAINI /Users/joeuser/.mapr.drillodbc.ini
-setenv ODBCSYSINI /Users/joeuser/.odbcinst.ini
-setenv ODBCINI /Users/joeuser/.odbc.ini
-launchctl setenv DYLD_LIBRARY_PATH /usr/local/iODBC/lib:/opt/mapr/drillodbc/lib/universal
-</code></pre></div>
-<h2 id="restart-the-mac-os-x-or-run-launchctl-load-/etc/launchd.conf.">Restart the Mac OS X or run <code>launchctl load /etc/launchd.conf</code>.</h2>
-
-<h2 id="step-2:-define-the-odbc-data-sources-in-.odbc.ini">Step 2: Define the ODBC Data Sources in .odbc.ini</h2>
-
-<p>Define the ODBC data sources in the <code>~/.odbc.ini</code> configuration file for your environment. The following sample shows a possible configuration for using Drill in embedded mode. </p>
-
-<p><strong>Example</strong></p>
-<div class="highlight"><pre><code class="language-text" data-lang="text">[ODBC]
-# Specify any global ODBC configuration here such as ODBC tracing.
-
-[ODBC Data Sources]
-Sample MapR Drill DSN=MapR Drill ODBC Driver
-
-[Sample MapR Drill DSN]
-# Description: DSN Description.
-# This key is not necessary and is only to give a description of the data source.
-Description=Sample MapR Drill ODBC Driver DSN
-# Driver: The location where the ODBC driver is installed to.
-Driver=/opt/mapr/drillodbc/lib/universal/libmaprdrillodbc.dylib
-
-# The DriverUnicodeEncoding setting is only used for SimbaDM
-# When set to 1, SimbaDM runs in UTF-16 mode.
-# When set to 2, SimbaDM runs in UTF-8 mode.
-#DriverUnicodeEncoding=2
-
-# Values for ConnectionType, AdvancedProperties, Catalog, Schema should be set here.
-
-# If ConnectionType is Direct, include Host and Port. If ConnectionType is ZooKeeper, include ZKQuorum and ZKClusterID
-# They can also be specified on the connection string.
-# AuthenticationType: No authentication; Basic Authentication
-ConnectionType=Direct
-HOST=localhost
-PORT=31010
-ZKQuorum=[Zookeeper Quorum]
-ZKClusterID=[Cluster ID]
-AuthenticationType=No Authentication
-UID=[USERNAME]
-PWD=[PASSWORD]
-AdvancedProperties=CastAnyToVarchar=true;HandshakeTimeout=5;QueryTimeout=180;TimestampTZDisplayTimezone=utc;ExcludedSchemas=sys,INFORMATION_SCHEMA;NumberOfPrefetchBuffers=5;
-Catalog=DRILL
-Schema=
-</code></pre></div>
-<h3 id="authentication-properties">Authentication Properties</h3>
-
-<p>To password protect the DSN, uncomment the AuthenticationType, select Basic Authentication for the AuthenticationType, and configure UID and PWD properties.</p>
-
-<h3 id="direct-to-drillbit-and-zookeeper-quorum-properties">Direct to Drillbit and ZooKeeper Quorum Properties</h3>
-
-<p>To use Drill in distributed mode, set ConnectionType to Zookeeper, get the ZKQuorum and ZKClusterID values from the <code>drill-override.conf</code> file, and define the ZKQuorum and ZKClusterID properties. For example:</p>
-
-<ul>
-<li><code>ZKQuorum=localhost:2181</code><br></li>
-<li><code>ZKClusterID=drillbits1</code></li>
-</ul>
-
-<p>To use Drill in embedded mode, set ConnectionType to Direct and define HOST and PORT properties. For example:</p>
-
-<ul>
-<li><code>HOST=localhost</code><br></li>
-<li><code>PORT=31010</code></li>
-</ul>
-
-<p><a href="/docs/odbc-configuration-reference/#configuration-options">Driver Configuration Options</a> describes configuration options available for controlling the
-behavior of DSNs using the MapR Drill ODBC Driver.</p>
-
-<hr>
-
-<h2 id="step-3:-(optional)-define-the-odbc-driver-in-.odbcinst.ini">Step 3: (Optional) Define the ODBC Driver in .odbcinst.ini</h2>
-
-<p>The <code>.odbcinst.ini</code> is an optional configuration file that defines the ODBC
-Drivers. This configuration file is optional because you can specify drivers
-directly in the<code>.odbc.ini</code> configuration file. The following sample shows a possible configuration.</p>
-
-<p><strong>Example</strong></p>
-<div class="highlight"><pre><code class="language-text" data-lang="text">[ODBC Drivers]
-MapR Drill ODBC Driver=Installed
-
-[MapR Drill ODBC Driver]
-Description=MapR Drill ODBC Driver
-Driver=/opt/mapr/drillodbc/lib/universal/libmaprdrillodbc.dylib
-</code></pre></div>
-<hr>
-
-<h2 id="step-4:-configure-the-mapr-drill-odbc-driver">Step 4: Configure the MapR Drill ODBC Driver</h2>
-
-<p>Configure the MapR Drill ODBC Driver for your environment by modifying the <code>.mapr.drillodbc.ini</code> configuration
-file. This configures the driver to work with your ODBC driver manager. The following sample shows a possible configuration, which you can use as is if you installed the default iODBC driver manager.</p>
-
-<p><strong>Example</strong></p>
-<div class="highlight"><pre><code class="language-text" data-lang="text">[Driver]
-## - Note that this default DriverManagerEncoding of UTF-32 is for iODBC.
-DriverManagerEncoding=UTF-32
-ErrorMessagesPath=/opt/mapr/drillodbc/ErrorMessages
-
-LogLevel=0
-LogPath=
-SwapFilePath=/tmp
-
-# iODBC
-ODBCInstLib=libiodbcinst.dylib
-</code></pre></div>
-<h3 id="configuring-.mapr.drillodbc.ini">Configuring .mapr.drillodbc.ini</h3>
-
-<p>To configure the MapR Drill ODBC Driver in the <code>mapr.drillodbc.ini</code> configuration file, complete the following steps:</p>
-
-<ol>
-<li>Open the <code>mapr.drillodbc.ini</code> configuration file in a text editor.</li>
-<li>Edit the DriverManagerEncoding setting if necessary. The value is typically UTF-16 or UTF-32, but depends on the driver manager used. iODBC uses UTF-32 and unixODBC uses UTF-16. Review your ODBC Driver Manager documentation for the correct setting.</li>
-<li>Edit the <code>ODBCInstLib</code> setting. The value is the name of the <code>ODBCInst</code> shared library for the ODBC driver manager that you use. The configuration file defaults to the shared library for <code>iODBC</code>. In Linux, the shared library name for iODBC is <code>libiodbcinst.so</code>. In Mac OS X, the shared library name for <code>iODBC</code> is <code>libiodbcinst.dylib</code>.
- <div class="admonition note">
-<p class="first admonition-title">Note</p>
-<p class="last">Review your ODBC Driver Manager documentation for the correct
-setting. </p>
-</div>
- Specify an absolute or relative filename for the library. If you use
-the relative file name, include the path to the library in the library path
-environment variable. In Linux, the library path environment variable is named
-<code>LD_LIBRARY_PATH</code>. In Mac OS X, the library path environment variable is
-named <code>DYLD_LIBRARY_PATH</code>.</li>
-<li>Save the <code>mapr.drillodbc.ini</code> configuration file.</li>
-</ol>
-
-<h3 id="next-step">Next Step</h3>
-
-<p>Refer to <a href="/docs/testing-the-odbc-connection">Testing the ODBC Connection on Linux and Mac OS X</a>.</p>
-
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-
- <div class="doc-nav">
-
- <span class="previous-toc"><a href="/docs/odbc-configuration-reference/">\u2190 ODBC Configuration Reference</a></span><span class="next-toc"><a href="/docs/configuring-odbc-on-windows/">Configuring ODBC on Windows \u2192</a></span>
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[12/51] [partial] drill-site git commit: Cleaning up deleted content.
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- <p>The LIMIT clause limits the result set to the specified number of rows. You can use LIMIT with or without an ORDER BY clause.</p>
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-<h2 id="syntax">Syntax</h2>
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-<p>The LIMIT clause supports the following syntax: </p>
-<div class="highlight"><pre><code class="language-text" data-lang="text"> [ LIMIT { count | ALL } ]
-</code></pre></div>
-<p>Specifying ALL returns all records, which is equivalent to omitting the LIMIT clause from the SELECT statement.</p>
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-<h2 id="parameters">Parameters</h2>
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-<p><em>count</em> </p>
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-<p>Specifies the maximum number of rows to return.
-If the count expression evaluates to NULL, Drill treats it as LIMIT ALL. </p>
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-<h2 id="examples">Examples</h2>
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-<p>The following example query includes the ORDER BY and LIMIT clauses and returns the top 20 sales totals by month and state: </p>
-<div class="highlight"><pre><code class="language-text" data-lang="text"> 0: jdbc:drill:> select `month`, state, sum(order_total) as sales from orders group by `month`, state
- order by 3 desc limit 20;
- +------------+------------+------------+
- | month | state | sales |
- +------------+------------+------------+
- | May | ca | 119586 |
- | June | ca | 116322 |
- | April | ca | 101363 |
- | March | ca | 99540 |
- | July | ca | 90285 |
- | October | ca | 80090 |
- | June | tx | 78363 |
- | May | tx | 77247 |
- | March | tx | 73815 |
- | August | ca | 71255 |
- | April | tx | 68385 |
- | July | tx | 63858 |
- | February | ca | 63527 |
- | June | fl | 62199 |
- | June | ny | 62052 |
- | May | fl | 61651 |
- | May | ny | 59369 |
- | October | tx | 55076 |
- | March | fl | 54867 |
- | March | ny | 52101 |
- +------------+------------+------------+
- 20 rows selected
-</code></pre></div>
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- <li class="toctree-l2"><a class="reference internal" href="/docs/analyzing-highly-dynamic-datasets/">Analyzing Highly Dynamic Datasets</a></li>
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- <li class="toctree-l2"><a class="reference internal" href="/docs/analyzing-social-media/">Analyzing Social Media</a></li>
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- </ul>
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- <li class="toctree-l1"><a href="javascript: void(0);">Install Drill</a></li>
- <ul style="display: none">
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- <li class="toctree-l2"><a class="reference internal" href="/docs/install-drill-introduction/">Install Drill Introduction</a></li>
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- <li class="toctree-l2"><a href="javascript: void(0);">Installing Drill in Embedded Mode</a></li>
- <ul style="display: none">
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- <li class="toctree-l3"><a class="reference internal" href="/docs/embedded-mode-prerequisites/">Embedded Mode Prerequisites</a></li>
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- <li class="toctree-l3"><a class="reference internal" href="/docs/installing-drill-on-linux-and-mac-os-x/">Installing Drill on Linux and Mac OS X</a></li>
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- <li class="toctree-l3"><a class="reference internal" href="/docs/starting-drill-on-linux-and-mac-os-x/">Starting Drill on Linux and Mac OS X</a></li>
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- <li class="toctree-l3"><a class="reference internal" href="/docs/installing-drill-on-windows/">Installing Drill on Windows</a></li>
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- <li class="toctree-l3"><a class="reference internal" href="/docs/starting-drill-on-windows/">Starting Drill on Windows</a></li>
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- </ul>
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- <li class="toctree-l2"><a href="javascript: void(0);">Installing Drill in Distributed Mode</a></li>
- <ul style="display: none">
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- <li class="toctree-l3"><a class="reference internal" href="/docs/distributed-mode-prerequisites/">Distributed Mode Prerequisites</a></li>
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- <li class="toctree-l3"><a class="reference internal" href="/docs/installing-drill-on-the-cluster/">Installing Drill on the Cluster</a></li>
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- <li class="toctree-l3"><a class="reference internal" href="/docs/starting-drill-in-distributed-mode/">Starting Drill in Distributed Mode</a></li>
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- </ul>
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- </ul>
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- <li class="toctree-l1"><a href="javascript: void(0);">Configure Drill</a></li>
- <ul style="display: none">
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- <li class="toctree-l2"><a class="reference internal" href="/docs/configure-drill-introduction/">Configure Drill Introduction</a></li>
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- <li class="toctree-l2"><a class="reference internal" href="/docs/configuring-drill-memory/">Configuring Drill Memory</a></li>
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- <li class="toctree-l2"><a href="javascript: void(0);">Configuring a Multitenant Cluster</a></li>
- <ul style="display: none">
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- <li class="toctree-l3"><a class="reference internal" href="/docs/configuring-a-multitenant-cluster-introduction/">Configuring a Multitenant Cluster Introduction</a></li>
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- <li class="toctree-l3"><a class="reference internal" href="/docs/configuring-multitenant-resources/">Configuring Multitenant Resources</a></li>
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- <li class="toctree-l3"><a class="reference internal" href="/docs/configuring-resources-for-a-shared-drillbit/">Configuring Resources for a Shared Drillbit</a></li>
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- </ul>
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- <li class="toctree-l2"><a class="reference internal" href="/docs/configuring-user-impersonation/">Configuring User Impersonation</a></li>
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- <li class="toctree-l2"><a class="reference internal" href="/docs/configuring-user-authentication/">Configuring User Authentication</a></li>
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- <li class="toctree-l2"><a href="javascript: void(0);">Configuration Options</a></li>
- <ul style="display: none">
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- <li class="toctree-l3"><a class="reference internal" href="/docs/configuration-options-introduction/">Configuration Options Introduction</a></li>
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- <li class="toctree-l3"><a class="reference internal" href="/docs/start-up-options/">Start-Up Options</a></li>
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- <li class="toctree-l3"><a class="reference internal" href="/docs/planning-and-execution-options/">Planning and Execution Options</a></li>
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- <li class="toctree-l3"><a class="reference internal" href="/docs/persistent-configuration-storage/">Persistent Configuration Storage</a></li>
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- </ul>
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- <li class="toctree-l2"><a class="reference internal" href="/docs/ports-used-by-drill/">Ports Used by Drill</a></li>
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- <li class="toctree-l2"><a class="reference internal" href="/docs/configuring-the-drill-shell/">Configuring the Drill Shell</a></li>
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- </ul>
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- <li class="toctree-l1"><a href="javascript: void(0);">Connect a Data Source</a></li>
- <ul style="display: none">
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- <li class="toctree-l2"><a class="reference internal" href="/docs/connect-a-data-source-introduction/">Connect a Data Source Introduction</a></li>
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- <li class="toctree-l2"><a class="reference internal" href="/docs/storage-plugin-registration/">Storage Plugin Registration</a></li>
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- <li class="toctree-l2"><a href="javascript: void(0);">Storage Plugin Configuration</a></li>
- <ul style="display: none">
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- <li class="toctree-l3"><a class="reference internal" href="/docs/plugin-configuration-basics/">Plugin Configuration Basics</a></li>
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- <li class="toctree-l3"><a class="reference internal" href="/docs/file-system-storage-plugin/">File System Storage Plugin</a></li>
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- <li class="toctree-l3"><a class="reference internal" href="/docs/workspaces/">Workspaces</a></li>
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- <li class="toctree-l3"><a class="reference internal" href="/docs/hbase-storage-plugin/">HBase Storage Plugin</a></li>
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- <li class="toctree-l3"><a class="reference internal" href="/docs/hive-storage-plugin/">Hive Storage Plugin</a></li>
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- <li class="toctree-l3"><a class="reference internal" href="/docs/drill-default-input-format/">Drill Default Input Format</a></li>
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- </ul>
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- <li class="toctree-l2"><a class="reference internal" href="/docs/mongodb-plugin-for-apache-drill/">MongoDB Plugin for Apache Drill</a></li>
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- <li class="toctree-l2"><a class="reference internal" href="/docs/mapr-db-format/">MapR-DB Format</a></li>
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- </ul>
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- <li class="toctree-l1"><a href="javascript: void(0);">ODBC/JDBC Interfaces</a></li>
- <ul style="display: none">
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- <li class="toctree-l2"><a class="reference internal" href="/docs/interfaces-introduction/">Interfaces Introduction</a></li>
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- <li class="toctree-l2"><a class="reference internal" href="/docs/using-jdbc-with-squirrel-on-windows/">Using JDBC with SQuirreL on Windows</a></li>
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- <li class="toctree-l2"><a href="javascript: void(0);">Using ODBC on Linux and Mac OS X</a></li>
- <ul style="display: none">
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- <li class="toctree-l3"><a class="reference internal" href="/docs/odbc-on-linux-and-mac-introduction/">ODBC on Linux and Mac Introduction</a></li>
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- <li class="toctree-l3"><a class="reference internal" href="/docs/installing-the-driver-on-linux/">Installing the Driver on Linux</a></li>
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- <li class="toctree-l3"><a class="reference internal" href="/docs/installing-the-driver-on-mac-os-x/">Installing the Driver on Mac OS X</a></li>
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- <li class="toctree-l3"><a class="reference internal" href="/docs/configuring-connections-on-linux-and-mac-os-x/">Configuring Connections on Linux and Mac OS X</a></li>
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- <li class="toctree-l3"><a class="reference internal" href="/docs/driver-configuration-options/">Driver Configuration Options</a></li>
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- <li class="toctree-l3"><a class="reference internal" href="/docs/using-a-connection-string/">Using a Connection String</a></li>
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- <li class="toctree-l3"><a class="reference internal" href="/docs/advanced-properties/">Advanced Properties</a></li>
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- <li class="toctree-l3"><a class="reference internal" href="/docs/testing-the-odbc-connection/">Testing the ODBC Connection</a></li>
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- </ul>
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- <li class="toctree-l2"><a href="javascript: void(0);">Using ODBC on Windows</a></li>
- <ul style="display: none">
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- <li class="toctree-l3"><a class="reference internal" href="/docs/installing-the-driver-on-windows/">Installing the Driver on Windows</a></li>
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- <li class="toctree-l3"><a class="reference internal" href="/docs/configuring-connections-on-windows/">Configuring Connections on Windows</a></li>
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- <li class="toctree-l3"><a class="reference internal" href="/docs/connecting-to-odbc-data-sources/">Connecting to ODBC Data Sources</a></li>
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- <li class="toctree-l3"><a class="reference internal" href="/docs/tableau-examples/">Tableau Examples</a></li>
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- <li class="toctree-l3"><a class="reference internal" href="/docs/using-drill-explorer-on-windows/">Using Drill Explorer on Windows</a></li>
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- </ul>
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-
-
- <li class="toctree-l2"><a class="reference internal" href="/docs/using-microstrategy-analytics-with-apache-drill/">Using MicroStrategy Analytics with Apache Drill</a></li>
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- <li class="toctree-l2"><a class="reference internal" href="/docs/using-tibco-spotfire-with-drill/">Using Tibco Spotfire with Drill</a></li>
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- <li class="toctree-l2"><a class="reference internal" href="/docs/configuring-tibco-spotfire-server-with-drill/">Configuring Tibco Spotfire Server with Drill</a></li>
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- <li class="toctree-l2"><a class="reference internal" href="/docs/using-apache-drill-with-tableau-9-desktop/">Using Apache Drill with Tableau 9 Desktop</a></li>
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- <li class="toctree-l2"><a class="reference internal" href="/docs/using-apache-drill-with-tableau-9-server/">Using Apache Drill with Tableau 9 Server</a></li>
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- </ul>
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- <li class="toctree-l1"><a href="javascript: void(0);">Query Data</a></li>
- <ul style="display: none">
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- <li class="toctree-l2"><a class="reference internal" href="/docs/query-data-introduction/">Query Data Introduction</a></li>
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- <li class="toctree-l2"><a href="javascript: void(0);">Querying a File System</a></li>
- <ul style="display: none">
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- <li class="toctree-l3"><a class="reference internal" href="/docs/querying-a-file-system-introduction/">Querying a File System Introduction</a></li>
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- <li class="toctree-l3"><a class="reference internal" href="/docs/querying-json-files/">Querying JSON Files</a></li>
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- <li class="toctree-l3"><a class="reference internal" href="/docs/querying-parquet-files/">Querying Parquet Files</a></li>
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- <li class="toctree-l3"><a class="reference internal" href="/docs/querying-plain-text-files/">Querying Plain Text Files</a></li>
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- <li class="toctree-l3"><a class="reference internal" href="/docs/querying-directories/">Querying Directories</a></li>
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- </ul>
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- <li class="toctree-l2"><a class="reference internal" href="/docs/querying-hbase/">Querying HBase</a></li>
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- <li class="toctree-l2"><a href="javascript: void(0);">Querying Complex Data</a></li>
- <ul style="display: none">
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- <li class="toctree-l3"><a class="reference internal" href="/docs/querying-complex-data-introduction/">Querying Complex Data Introduction</a></li>
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- <li class="toctree-l3"><a class="reference internal" href="/docs/sample-data-donuts/">Sample Data: Donuts</a></li>
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- <li class="toctree-l3"><a class="reference internal" href="/docs/selecting-flat-data/">Selecting Flat Data</a></li>
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- <li class="toctree-l3"><a class="reference internal" href="/docs/using-sql-functions-clauses-and-joins/">Using SQL Functions, Clauses, and Joins</a></li>
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- <li class="toctree-l3"><a class="reference internal" href="/docs/selecting-nested-data-for-a-column/">Selecting Nested Data for a Column</a></li>
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- <li class="toctree-l3"><a class="reference internal" href="/docs/selecting-multiple-columns-within-nested-data/">Selecting Multiple Columns Within Nested Data</a></li>
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- </ul>
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- <li class="toctree-l2"><a class="reference internal" href="/docs/querying-hive/">Querying Hive</a></li>
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- <li class="toctree-l2"><a class="reference internal" href="/docs/querying-the-information-schema/">Querying the INFORMATION SCHEMA</a></li>
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- <li class="toctree-l2"><a class="reference internal" href="/docs/querying-system-tables/">Querying System Tables</a></li>
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- <li class="toctree-l2"><a class="reference internal" href="/docs/monitoring-and-canceling-queries-in-the-drill-web-ui/">Monitoring and Canceling Queries in the Drill Web UI</a></li>
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-
- </ul>
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-
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- <li class="toctree-l1"><a href="javascript: void(0);">Performance Tuning</a></li>
- <ul style="display: none">
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- <li class="toctree-l2"><a class="reference internal" href="/docs/performance-tuning-introduction/">Performance Tuning Introduction</a></li>
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- <li class="toctree-l2"><a class="reference internal" href="/docs/partition-pruning/">Partition Pruning</a></li>
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- <li class="toctree-l2"><a class="reference internal" href="/docs/choosing-a-storage-format/">Choosing a Storage Format</a></li>
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- <li class="toctree-l2"><a href="javascript: void(0);">Query Plans and Tuning</a></li>
- <ul style="display: none">
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- <li class="toctree-l3"><a class="reference internal" href="/docs/query-plans-and-tuning-introduction/">Query Plans and Tuning Introduction</a></li>
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- <li class="toctree-l3"><a class="reference internal" href="/docs/join-planning-guidelines/">Join Planning Guidelines</a></li>
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- <li class="toctree-l3"><a class="reference internal" href="/docs/guidelines-for-optimizing-aggregation/">Guidelines for Optimizing Aggregation</a></li>
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- <li class="toctree-l3"><a class="reference internal" href="/docs/modifying-query-planning-options/">Modifying Query Planning Options</a></li>
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- <li class="toctree-l3"><a class="reference internal" href="/docs/sort-based-and-hash-based-memory-constrained-operators/">Sort-Based and Hash-Based Memory-Constrained Operators</a></li>
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- <li class="toctree-l3"><a class="reference internal" href="/docs/enabling-query-queuing/">Enabling Query Queuing</a></li>
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- <li class="toctree-l3"><a class="reference internal" href="/docs/controlling-parallelization-to-balance-performance-with-multi-tenancy/">Controlling Parallelization to Balance Performance with Multi-Tenancy</a></li>
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- </ul>
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- <li class="toctree-l2"><a href="javascript: void(0);">Identifying Performance Issues</a></li>
- <ul style="display: none">
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- <li class="toctree-l3"><a class="reference internal" href="/docs/query-plans/">Query Plans</a></li>
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- <li class="toctree-l3"><a class="reference internal" href="/docs/query-profiles/">Query Profiles</a></li>
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- </ul>
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- <li class="toctree-l2"><a href="javascript: void(0);">Performance Tuning Reference</a></li>
- <ul style="display: none">
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- <li class="toctree-l3"><a class="reference internal" href="/docs/query-profile-column-descriptions/">Query Profile Column Descriptions</a></li>
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- <li class="toctree-l3"><a class="reference internal" href="/docs/physical-operators/">Physical Operators</a></li>
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- </ul>
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- </ul>
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- <li class="toctree-l1"><a href="javascript: void(0);">Log and Debug</a></li>
- <ul style="display: none">
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- <li class="toctree-l2"><a class="reference internal" href="/docs/log-and-debug-introduction/">Log and Debug Introduction</a></li>
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- <li class="toctree-l2"><a class="reference internal" href="/docs/error-messages/">Error Messages</a></li>
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- <li class="toctree-l2"><a class="reference internal" href="/docs/modify-logback-xml/">Modify logback.xml</a></li>
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- <li class="toctree-l2"><a class="reference internal" href="/docs/review-the-java-stack-trace/">Review the Java Stack Trace</a></li>
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- </ul>
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- <li class="toctree-l1"><a href="javascript: void(0);">Query Audit Logging</a></li>
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- <li class="toctree-l2"><a class="reference internal" href="/docs/getting-query-information/">Getting Query Information</a></li>
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- </ul>
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- <li class="toctree-l1 current_section "><a href="javascript: void(0);">SQL Reference</a></li>
- <ul class="current_section">
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- <li class="toctree-l2"><a class="reference internal" href="/docs/sql-reference-introduction/">SQL Reference Introduction</a></li>
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- <li class="toctree-l2"><a href="javascript: void(0);">Data Types</a></li>
- <ul style="display: none">
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- <li class="toctree-l3"><a class="reference internal" href="/docs/supported-data-types/">Supported Data Types</a></li>
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- <li class="toctree-l3"><a class="reference internal" href="/docs/date-time-and-timestamp/">Date, Time, and Timestamp</a></li>
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- <li class="toctree-l3"><a class="reference internal" href="/docs/handling-different-data-types/">Handling Different Data Types</a></li>
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- </ul>
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- <li class="toctree-l2"><a class="reference internal" href="/docs/lexical-structure/">Lexical Structure</a></li>
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- <li class="toctree-l2"><a class="reference internal" href="/docs/operators/">Operators</a></li>
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- <li class="toctree-l2"><a href="javascript: void(0);">SQL Functions</a></li>
- <ul style="display: none">
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- <li class="toctree-l3"><a class="reference internal" href="/docs/about-sql-function-examples/">About SQL Function Examples</a></li>
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- <li class="toctree-l3"><a class="reference internal" href="/docs/math-and-trig/">Math and Trig</a></li>
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- <li class="toctree-l3"><a class="reference internal" href="/docs/data-type-conversion/">Data Type Conversion</a></li>
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- <li class="toctree-l3"><a class="reference internal" href="/docs/date-time-functions-and-arithmetic/">Date/Time Functions and Arithmetic</a></li>
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- <li class="toctree-l3"><a class="reference internal" href="/docs/string-manipulation/">String Manipulation</a></li>
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- <li class="toctree-l3"><a class="reference internal" href="/docs/aggregate-and-aggregate-statistical/">Aggregate and Aggregate Statistical</a></li>
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- <li class="toctree-l3"><a class="reference internal" href="/docs/functions-for-handling-nulls/">Functions for Handling Nulls</a></li>
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- </ul>
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- <li class="toctree-l2"><a href="javascript: void(0);">Nested Data Functions</a></li>
- <ul style="display: none">
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- <li class="toctree-l3"><a class="reference internal" href="/docs/nested-data-limitations/">Nested Data Limitations</a></li>
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- <li class="toctree-l3"><a class="reference internal" href="/docs/flatten/">FLATTEN</a></li>
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- <li class="toctree-l3"><a class="reference internal" href="/docs/kvgen/">KVGEN</a></li>
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- <li class="toctree-l3"><a class="reference internal" href="/docs/repeated-count/">REPEATED_COUNT</a></li>
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- <li class="toctree-l3"><a class="reference internal" href="/docs/repeated-contains/">REPEATED_CONTAINS</a></li>
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- </ul>
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- <li class="toctree-l2"><a class="reference internal" href="/docs/query-directory-functions/">Query Directory Functions</a></li>
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- <ul style="">
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- <li class="toctree-l3"><a class="reference internal" href="/docs/supported-sql-commands/">Supported SQL Commands</a></li>
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- <li class="toctree-l3"><a class="reference internal" href="/docs/alter-session/">ALTER SESSION</a></li>
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- <li class="toctree-l3"><a class="reference internal" href="/docs/alter-system/">ALTER SYSTEM</a></li>
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- <li class="toctree-l3"><a class="reference internal" href="/docs/create-table-as-ctas/">CREATE TABLE AS (CTAS)</a></li>
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- <li class="toctree-l3"><a class="reference internal" href="/docs/create-view/">CREATE VIEW</a></li>
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- <li class="toctree-l3"><a class="reference internal" href="/docs/drop-view/">DROP VIEW</a></li>
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- <li class="toctree-l3"><a class="reference internal" href="/docs/describe/">DESCRIBE</a></li>
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- <li class="toctree-l3"><a class="reference internal" href="/docs/explain/">EXPLAIN</a></li>
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- <li class="toctree-l3"><a class="reference internal" href="/docs/select/">SELECT</a></li>
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- <li class="toctree-l3"><a class="reference internal" href="/docs/select-from/">SELECT FROM</a></li>
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- <li class="toctree-l3 current"><a class="reference internal" href="/docs/select-group-by/">SELECT GROUP BY</a></li>
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- <li class="toctree-l3"><a class="reference internal" href="/docs/select-having/">SELECT HAVING</a></li>
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- <li class="toctree-l3"><a class="reference internal" href="/docs/select-limit/">SELECT LIMIT</a></li>
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- <li class="toctree-l3"><a class="reference internal" href="/docs/select-offset/">SELECT OFFSET</a></li>
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- <li class="toctree-l3"><a class="reference internal" href="/docs/select-order-by/">SELECT ORDER BY</a></li>
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- <li class="toctree-l3"><a class="reference internal" href="/docs/select-union/">SELECT UNION</a></li>
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- <li class="toctree-l3"><a class="reference internal" href="/docs/select-where/">SELECT WHERE</a></li>
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- <li class="toctree-l3"><a class="reference internal" href="/docs/select-with/">SELECT WITH</a></li>
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- <li class="toctree-l3"><a class="reference internal" href="/docs/show-databases-and-show-schemas/">SHOW DATABASES and SHOW SCHEMAS</a></li>
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- <li class="toctree-l3"><a class="reference internal" href="/docs/show-files/">SHOW FILES</a></li>
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- <li class="toctree-l3"><a class="reference internal" href="/docs/show-tables/">SHOW TABLES</a></li>
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- <li class="toctree-l3"><a class="reference internal" href="/docs/use/">USE</a></li>
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- <li class="toctree-l2"><a href="javascript: void(0);">SQL Conditional Expressions</a></li>
- <ul style="display: none">
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- <li class="toctree-l3"><a class="reference internal" href="/docs/case/">CASE</a></li>
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- <li class="toctree-l2"><a class="reference internal" href="/docs/reserved-keywords/">Reserved Keywords</a></li>
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- <li class="toctree-l2"><a class="reference internal" href="/docs/sql-extensions/">SQL Extensions</a></li>
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- </ul>
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- <li class="toctree-l1"><a href="javascript: void(0);">Data Sources and File Formats</a></li>
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- <li class="toctree-l2"><a class="reference internal" href="/docs/data-sources-and-file-formats-introduction/">Data Sources and File Formats Introduction</a></li>
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- <li class="toctree-l2"><a class="reference internal" href="/docs/hive-to-drill-data-type-mapping/">Hive-to-Drill Data Type Mapping</a></li>
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- <li class="toctree-l2"><a class="reference internal" href="/docs/deploying-and-using-a-hive-udf/">Deploying and Using a Hive UDF</a></li>
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-<div class="highlight"><pre><code class="language-text" data-lang="text"> 0: jdbc:drill:> select `month`, sum(order_total)
- from orders group by `month` order by 2 desc;
- +------------+------------+
- | month | EXPR$1 |
- +------------+------------+
- | June | 950481 |
- | May | 947796 |
- | March | 836809 |
- | April | 807291 |
- | July | 757395 |
- | October | 676236 |
- | August | 572269 |
- | February | 532901 |
- | September | 373100 |
- | January | 346536 |
- +------------+------------+
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- <li class="toctree-l3"><a class="reference internal" href="/docs/odbc-on-linux-and-mac-introduction/">ODBC on Linux and Mac Introduction</a></li>
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- <li class="toctree-l3"><a class="reference internal" href="/docs/using-a-connection-string/">Using a Connection String</a></li>
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- <li class="toctree-l3"><a class="reference internal" href="/docs/testing-the-odbc-connection/">Testing the ODBC Connection</a></li>
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- </ul>
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- <li class="toctree-l3"><a class="reference internal" href="/docs/installing-the-driver-on-windows/">Installing the Driver on Windows</a></li>
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- <li class="toctree-l3"><a class="reference internal" href="/docs/configuring-connections-on-windows/">Configuring Connections on Windows</a></li>
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- <li class="toctree-l3"><a class="reference internal" href="/docs/connecting-to-odbc-data-sources/">Connecting to ODBC Data Sources</a></li>
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- <li class="toctree-l3"><a class="reference internal" href="/docs/tableau-examples/">Tableau Examples</a></li>
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- <li class="toctree-l3"><a class="reference internal" href="/docs/using-drill-explorer-on-windows/">Using Drill Explorer on Windows</a></li>
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- </ul>
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- <li class="toctree-l2"><a class="reference internal" href="/docs/using-microstrategy-analytics-with-drill/">Using MicroStrategy Analytics with Drill</a></li>
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- <li class="toctree-l2"><a class="reference internal" href="/docs/using-apache-drill-with-tibco-spotfire-desktop/">Using Apache Drill with Tibco Spotfire Desktop</a></li>
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- <li class="toctree-l2"><a class="reference internal" href="/docs/using-apache-drill-with-tibco-spotfire-desktop/">Using Apache Drill with Tibco Spotfire Desktop</a></li>
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- </ul>
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- <li class="toctree-l1"><a href="javascript: void(0);">Query Data</a></li>
- <ul style="display: none">
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- <li class="toctree-l2"><a class="reference internal" href="/docs/query-data-introduction/">Query Data Introduction</a></li>
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- <li class="toctree-l2"><a href="javascript: void(0);">Querying a File System</a></li>
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- <li class="toctree-l3"><a class="reference internal" href="/docs/querying-a-file-system-introduction/">Querying a File System Introduction</a></li>
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- <li class="toctree-l3"><a class="reference internal" href="/docs/querying-json-files/">Querying JSON Files</a></li>
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- <li class="toctree-l3"><a class="reference internal" href="/docs/querying-parquet-files/">Querying Parquet Files</a></li>
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- <li class="toctree-l3"><a class="reference internal" href="/docs/querying-plain-text-files/">Querying Plain Text Files</a></li>
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- <li class="toctree-l3"><a class="reference internal" href="/docs/querying-directories/">Querying Directories</a></li>
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- </ul>
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- <li class="toctree-l2"><a class="reference internal" href="/docs/querying-hbase/">Querying HBase</a></li>
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- <li class="toctree-l3"><a class="reference internal" href="/docs/querying-complex-data-introduction/">Querying Complex Data Introduction</a></li>
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- <li class="toctree-l3"><a class="reference internal" href="/docs/sample-data-donuts/">Sample Data: Donuts</a></li>
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- <li class="toctree-l3"><a class="reference internal" href="/docs/selecting-flat-data/">Selecting Flat Data</a></li>
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- <li class="toctree-l3"><a class="reference internal" href="/docs/using-sql-functions-clauses-and-joins/">Using SQL Functions, Clauses, and Joins</a></li>
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- <li class="toctree-l3"><a class="reference internal" href="/docs/selecting-nested-data-for-a-column/">Selecting Nested Data for a Column</a></li>
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- <li class="toctree-l2"><a class="reference internal" href="/docs/querying-hive/">Querying Hive</a></li>
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- <li class="toctree-l2"><a class="reference internal" href="/docs/querying-system-tables/">Querying System Tables</a></li>
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- <li class="toctree-l3"><a class="reference internal" href="/docs/date-time-and-timestamp/">Date, Time, and Timestamp</a></li>
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- <li class="toctree-l3"><a class="reference internal" href="/docs/handling-different-data-types/">Handling Different Data Types</a></li>
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- <li class="toctree-l3"><a class="reference internal" href="/docs/date-time-functions-and-arithmetic/">Date/Time Functions and Arithmetic</a></li>
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- <li class="toctree-l3"><a class="reference internal" href="/docs/string-manipulation/">String Manipulation</a></li>
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- <li class="toctree-l3"><a class="reference internal" href="/docs/aggregate-and-aggregate-statistical/">Aggregate and Aggregate Statistical</a></li>
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- <li class="toctree-l3"><a class="reference internal" href="/docs/functions-for-handling-nulls/">Functions for Handling Nulls</a></li>
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- </ul>
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- <li class="toctree-l2"><a href="javascript: void(0);">Nested Data Functions</a></li>
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- <li class="toctree-l3"><a class="reference internal" href="/docs/flatten/">FLATTEN</a></li>
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- <li class="toctree-l3"><a class="reference internal" href="/docs/kvgen/">KVGEN</a></li>
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- <li class="toctree-l3"><a class="reference internal" href="/docs/repeated-count/">REPEATED_COUNT</a></li>
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- <li class="toctree-l3"><a class="reference internal" href="/docs/repeated-contains/">REPEATED_CONTAINS</a></li>
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- </ul>
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- <li class="toctree-l3"><a class="reference internal" href="/docs/alter-system-command/">ALTER SYSTEM Command</a></li>
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- <li class="toctree-l3"><a class="reference internal" href="/docs/create-table-as-ctas-command/">CREATE TABLE AS (CTAS) command</a></li>
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- <li class="toctree-l3"><a class="reference internal" href="/docs/create-view-command/">CREATE VIEW command</a></li>
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- <li class="toctree-l3"><a class="reference internal" href="/docs/describe-command/">DESCRIBE Command</a></li>
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- <li class="toctree-l3"><a class="reference internal" href="/docs/show-databases-and-show-schemas-command/">SHOW DATABASES AND SHOW SCHEMAS Command</a></li>
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- <li class="toctree-l2"><a class="reference internal" href="/docs/parquet-format/">Parquet Format</a></li>
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- <li class="toctree-l2"><a class="reference internal" href="/docs/develop-a-simple-function/">Develop a Simple Function</a></li>
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-
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- <li class="toctree-l2"><a class="reference internal" href="/docs/developing-an-aggregate-function/">Developing an Aggregate Function</a></li>
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- <li class="toctree-l2"><a class="reference internal" href="/docs/adding-custom-functions-to-drill/">Adding Custom Functions to Drill</a></li>
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-
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- <li class="toctree-l2"><a class="reference internal" href="/docs/using-custom-functions-in-queries/">Using Custom Functions in Queries</a></li>
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- <li class="toctree-l2"><a class="reference internal" href="/docs/custom-function-interfaces/">Custom Function Interfaces</a></li>
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- <li class="toctree-l2"><a class="reference internal" href="/docs/monitoring-and-canceling-queries-in-the-drill-web-ui/">Monitoring and Canceling Queries in the Drill Web UI</a></li>
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-is stored in CSV or JSON format. The section covers the many options you can configure and how to configure memory resources for Drill running along side other workloads. This section also includes stopping and restarting a Drillbit on a node, ports used by Drill, and partition pruning.</p>
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- <li class="toctree-l2"><a class="reference internal" href="/docs/configuring-drill-memory/">Configuring Drill Memory</a></li>
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- <li class="toctree-l2"><a href="javascript: void(0);">Configuring a Multitenant Cluster</a></li>
- <ul style="display: none">
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- <li class="toctree-l3"><a class="reference internal" href="/docs/configuring-a-multitenant-cluster-introduction/">Configuring a Multitenant Cluster Introduction</a></li>
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- <li class="toctree-l3"><a class="reference internal" href="/docs/configuring-multitenant-resources/">Configuring Multitenant Resources</a></li>
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- <li class="toctree-l3"><a class="reference internal" href="/docs/configuring-resources-for-a-shared-drillbit/">Configuring Resources for a Shared Drillbit</a></li>
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- </ul>
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- <li class="toctree-l2"><a class="reference internal" href="/docs/configuring-user-impersonation/">Configuring User Impersonation</a></li>
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- <li class="toctree-l2"><a class="reference internal" href="/docs/configuring-user-authentication/">Configuring User Authentication</a></li>
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- <li class="toctree-l2"><a href="javascript: void(0);">Configuration Options</a></li>
- <ul style="display: none">
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- <li class="toctree-l3"><a class="reference internal" href="/docs/configuration-options-introduction/">Configuration Options Introduction</a></li>
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- <li class="toctree-l3"><a class="reference internal" href="/docs/start-up-options/">Start-Up Options</a></li>
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- <li class="toctree-l3"><a class="reference internal" href="/docs/planning-and-execution-options/">Planning and Execution Options</a></li>
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- <li class="toctree-l3"><a class="reference internal" href="/docs/persistent-configuration-storage/">Persistent Configuration Storage</a></li>
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- </ul>
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- <li class="toctree-l2"><a class="reference internal" href="/docs/ports-used-by-drill/">Ports Used by Drill</a></li>
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- <li class="toctree-l2"><a class="reference internal" href="/docs/configuring-the-drill-shell/">Configuring the Drill Shell</a></li>
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- </ul>
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- <li class="toctree-l1"><a href="javascript: void(0);">Connect a Data Source</a></li>
- <ul style="display: none">
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- <li class="toctree-l2"><a class="reference internal" href="/docs/connect-a-data-source-introduction/">Connect a Data Source Introduction</a></li>
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- <li class="toctree-l2"><a class="reference internal" href="/docs/storage-plugin-registration/">Storage Plugin Registration</a></li>
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- <li class="toctree-l2"><a href="javascript: void(0);">Storage Plugin Configuration</a></li>
- <ul style="display: none">
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- <li class="toctree-l3"><a class="reference internal" href="/docs/plugin-configuration-basics/">Plugin Configuration Basics</a></li>
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- <li class="toctree-l3"><a class="reference internal" href="/docs/file-system-storage-plugin/">File System Storage Plugin</a></li>
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- <li class="toctree-l3"><a class="reference internal" href="/docs/workspaces/">Workspaces</a></li>
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- <li class="toctree-l3"><a class="reference internal" href="/docs/hbase-storage-plugin/">HBase Storage Plugin</a></li>
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- <li class="toctree-l3"><a class="reference internal" href="/docs/hive-storage-plugin/">Hive Storage Plugin</a></li>
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- <li class="toctree-l3"><a class="reference internal" href="/docs/drill-default-input-format/">Drill Default Input Format</a></li>
-
- </ul>
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- <li class="toctree-l2"><a class="reference internal" href="/docs/mongodb-plugin-for-apache-drill/">MongoDB Plugin for Apache Drill</a></li>
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- <li class="toctree-l2"><a class="reference internal" href="/docs/mapr-db-format/">MapR-DB Format</a></li>
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-
- </ul>
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- <li class="toctree-l1"><a href="javascript: void(0);">ODBC/JDBC Interfaces</a></li>
- <ul style="display: none">
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- <li class="toctree-l2"><a class="reference internal" href="/docs/interfaces-introduction/">Interfaces Introduction</a></li>
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- <li class="toctree-l2"><a class="reference internal" href="/docs/using-jdbc-with-squirrel-on-windows/">Using JDBC with SQuirreL on Windows</a></li>
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- <li class="toctree-l2"><a href="javascript: void(0);">Using ODBC on Linux and Mac OS X</a></li>
- <ul style="display: none">
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- <li class="toctree-l3"><a class="reference internal" href="/docs/odbc-on-linux-and-mac-introduction/">ODBC on Linux and Mac Introduction</a></li>
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- <li class="toctree-l3"><a class="reference internal" href="/docs/installing-the-driver-on-linux/">Installing the Driver on Linux</a></li>
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- <li class="toctree-l3"><a class="reference internal" href="/docs/installing-the-driver-on-mac-os-x/">Installing the Driver on Mac OS X</a></li>
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- <li class="toctree-l3"><a class="reference internal" href="/docs/configuring-connections-on-linux-and-mac-os-x/">Configuring Connections on Linux and Mac OS X</a></li>
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- <li class="toctree-l3"><a class="reference internal" href="/docs/driver-configuration-options/">Driver Configuration Options</a></li>
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- <li class="toctree-l3"><a class="reference internal" href="/docs/using-a-connection-string/">Using a Connection String</a></li>
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- <li class="toctree-l3"><a class="reference internal" href="/docs/advanced-properties/">Advanced Properties</a></li>
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- <li class="toctree-l3"><a class="reference internal" href="/docs/testing-the-odbc-connection/">Testing the ODBC Connection</a></li>
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- </ul>
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- <li class="toctree-l2"><a href="javascript: void(0);">Using ODBC on Windows</a></li>
- <ul style="display: none">
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- <li class="toctree-l3"><a class="reference internal" href="/docs/installing-the-driver-on-windows/">Installing the Driver on Windows</a></li>
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- <li class="toctree-l3"><a class="reference internal" href="/docs/configuring-connections-on-windows/">Configuring Connections on Windows</a></li>
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- <li class="toctree-l3"><a class="reference internal" href="/docs/connecting-to-odbc-data-sources/">Connecting to ODBC Data Sources</a></li>
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- <li class="toctree-l3"><a class="reference internal" href="/docs/tableau-examples/">Tableau Examples</a></li>
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- <li class="toctree-l3"><a class="reference internal" href="/docs/using-drill-explorer-on-windows/">Using Drill Explorer on Windows</a></li>
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- </ul>
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-
-
- <li class="toctree-l2"><a class="reference internal" href="/docs/using-microstrategy-analytics-with-apache-drill/">Using MicroStrategy Analytics with Apache Drill</a></li>
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- <li class="toctree-l2"><a class="reference internal" href="/docs/using-tibco-spotfire-with-drill/">Using Tibco Spotfire with Drill</a></li>
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-
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- <li class="toctree-l2"><a class="reference internal" href="/docs/configuring-tibco-spotfire-server-with-drill/">Configuring Tibco Spotfire Server with Drill</a></li>
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-
-
- <li class="toctree-l2"><a class="reference internal" href="/docs/using-apache-drill-with-tableau-9-desktop/">Using Apache Drill with Tableau 9 Desktop</a></li>
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- <li class="toctree-l2"><a class="reference internal" href="/docs/using-apache-drill-with-tableau-9-server/">Using Apache Drill with Tableau 9 Server</a></li>
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- </ul>
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- <li class="toctree-l1"><a href="javascript: void(0);">Query Data</a></li>
- <ul style="display: none">
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- <li class="toctree-l2"><a class="reference internal" href="/docs/query-data-introduction/">Query Data Introduction</a></li>
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- <li class="toctree-l2"><a href="javascript: void(0);">Querying a File System</a></li>
- <ul style="display: none">
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- <li class="toctree-l3"><a class="reference internal" href="/docs/querying-a-file-system-introduction/">Querying a File System Introduction</a></li>
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- <li class="toctree-l3"><a class="reference internal" href="/docs/querying-json-files/">Querying JSON Files</a></li>
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- <li class="toctree-l3"><a class="reference internal" href="/docs/querying-parquet-files/">Querying Parquet Files</a></li>
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- <li class="toctree-l3"><a class="reference internal" href="/docs/querying-plain-text-files/">Querying Plain Text Files</a></li>
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- <li class="toctree-l3"><a class="reference internal" href="/docs/querying-directories/">Querying Directories</a></li>
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- </ul>
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- <li class="toctree-l2"><a class="reference internal" href="/docs/querying-hbase/">Querying HBase</a></li>
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- <li class="toctree-l2"><a href="javascript: void(0);">Querying Complex Data</a></li>
- <ul style="display: none">
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- <li class="toctree-l3"><a class="reference internal" href="/docs/querying-complex-data-introduction/">Querying Complex Data Introduction</a></li>
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- <li class="toctree-l3"><a class="reference internal" href="/docs/sample-data-donuts/">Sample Data: Donuts</a></li>
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- <li class="toctree-l3"><a class="reference internal" href="/docs/selecting-flat-data/">Selecting Flat Data</a></li>
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- <li class="toctree-l3"><a class="reference internal" href="/docs/using-sql-functions-clauses-and-joins/">Using SQL Functions, Clauses, and Joins</a></li>
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- <li class="toctree-l3"><a class="reference internal" href="/docs/selecting-nested-data-for-a-column/">Selecting Nested Data for a Column</a></li>
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- <li class="toctree-l3"><a class="reference internal" href="/docs/selecting-multiple-columns-within-nested-data/">Selecting Multiple Columns Within Nested Data</a></li>
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- </ul>
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- <li class="toctree-l2"><a class="reference internal" href="/docs/querying-hive/">Querying Hive</a></li>
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- <li class="toctree-l2"><a class="reference internal" href="/docs/querying-the-information-schema/">Querying the INFORMATION SCHEMA</a></li>
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- <li class="toctree-l2"><a class="reference internal" href="/docs/querying-system-tables/">Querying System Tables</a></li>
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- <li class="toctree-l2"><a class="reference internal" href="/docs/monitoring-and-canceling-queries-in-the-drill-web-ui/">Monitoring and Canceling Queries in the Drill Web UI</a></li>
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-
- </ul>
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- <li class="toctree-l1"><a href="javascript: void(0);">Performance Tuning</a></li>
- <ul style="display: none">
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- <li class="toctree-l2"><a class="reference internal" href="/docs/performance-tuning-introduction/">Performance Tuning Introduction</a></li>
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- <li class="toctree-l2"><a class="reference internal" href="/docs/partition-pruning/">Partition Pruning</a></li>
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- <li class="toctree-l2"><a class="reference internal" href="/docs/choosing-a-storage-format/">Choosing a Storage Format</a></li>
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- <li class="toctree-l2"><a href="javascript: void(0);">Query Plans and Tuning</a></li>
- <ul style="display: none">
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- <li class="toctree-l3"><a class="reference internal" href="/docs/query-plans-and-tuning-introduction/">Query Plans and Tuning Introduction</a></li>
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- <li class="toctree-l3"><a class="reference internal" href="/docs/join-planning-guidelines/">Join Planning Guidelines</a></li>
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- <li class="toctree-l3"><a class="reference internal" href="/docs/guidelines-for-optimizing-aggregation/">Guidelines for Optimizing Aggregation</a></li>
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- <li class="toctree-l3"><a class="reference internal" href="/docs/modifying-query-planning-options/">Modifying Query Planning Options</a></li>
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- <li class="toctree-l3"><a class="reference internal" href="/docs/sort-based-and-hash-based-memory-constrained-operators/">Sort-Based and Hash-Based Memory-Constrained Operators</a></li>
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- <li class="toctree-l3"><a class="reference internal" href="/docs/enabling-query-queuing/">Enabling Query Queuing</a></li>
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- <li class="toctree-l3"><a class="reference internal" href="/docs/controlling-parallelization-to-balance-performance-with-multi-tenancy/">Controlling Parallelization to Balance Performance with Multi-Tenancy</a></li>
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- </ul>
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-
-
- <li class="toctree-l2"><a href="javascript: void(0);">Identifying Performance Issues</a></li>
- <ul style="display: none">
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- <li class="toctree-l3"><a class="reference internal" href="/docs/query-plans/">Query Plans</a></li>
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- <li class="toctree-l3"><a class="reference internal" href="/docs/query-profiles/">Query Profiles</a></li>
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- </ul>
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-
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- <li class="toctree-l2"><a href="javascript: void(0);">Performance Tuning Reference</a></li>
- <ul style="display: none">
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- <li class="toctree-l3"><a class="reference internal" href="/docs/query-profile-column-descriptions/">Query Profile Column Descriptions</a></li>
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- <li class="toctree-l3"><a class="reference internal" href="/docs/physical-operators/">Physical Operators</a></li>
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- </ul>
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-
- </ul>
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-
- <li class="toctree-l1"><a href="javascript: void(0);">Log and Debug</a></li>
- <ul style="display: none">
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- <li class="toctree-l2"><a class="reference internal" href="/docs/log-and-debug-introduction/">Log and Debug Introduction</a></li>
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- <li class="toctree-l2"><a class="reference internal" href="/docs/error-messages/">Error Messages</a></li>
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-
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- <li class="toctree-l2"><a class="reference internal" href="/docs/modify-logback-xml/">Modify logback.xml</a></li>
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- <li class="toctree-l2"><a class="reference internal" href="/docs/review-the-java-stack-trace/">Review the Java Stack Trace</a></li>
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-
- </ul>
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-
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- <li class="toctree-l1"><a href="javascript: void(0);">Query Audit Logging</a></li>
- <ul style="display: none">
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- <li class="toctree-l2"><a class="reference internal" href="/docs/getting-query-information/">Getting Query Information</a></li>
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- </ul>
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-
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- <li class="toctree-l1 current_section "><a href="javascript: void(0);">SQL Reference</a></li>
- <ul class="current_section">
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- <li class="toctree-l2"><a class="reference internal" href="/docs/sql-reference-introduction/">SQL Reference Introduction</a></li>
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- <li class="toctree-l2"><a href="javascript: void(0);">Data Types</a></li>
- <ul style="display: none">
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- <li class="toctree-l3"><a class="reference internal" href="/docs/supported-data-types/">Supported Data Types</a></li>
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- <li class="toctree-l3"><a class="reference internal" href="/docs/date-time-and-timestamp/">Date, Time, and Timestamp</a></li>
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- <li class="toctree-l3"><a class="reference internal" href="/docs/handling-different-data-types/">Handling Different Data Types</a></li>
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- </ul>
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- <li class="toctree-l2"><a class="reference internal" href="/docs/lexical-structure/">Lexical Structure</a></li>
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- <li class="toctree-l2"><a class="reference internal" href="/docs/operators/">Operators</a></li>
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- <li class="toctree-l2"><a href="javascript: void(0);">SQL Functions</a></li>
- <ul style="display: none">
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- <li class="toctree-l3"><a class="reference internal" href="/docs/about-sql-function-examples/">About SQL Function Examples</a></li>
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- <li class="toctree-l3"><a class="reference internal" href="/docs/math-and-trig/">Math and Trig</a></li>
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- <li class="toctree-l3"><a class="reference internal" href="/docs/data-type-conversion/">Data Type Conversion</a></li>
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- <li class="toctree-l3"><a class="reference internal" href="/docs/date-time-functions-and-arithmetic/">Date/Time Functions and Arithmetic</a></li>
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- <li class="toctree-l3"><a class="reference internal" href="/docs/string-manipulation/">String Manipulation</a></li>
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- <li class="toctree-l3"><a class="reference internal" href="/docs/aggregate-and-aggregate-statistical/">Aggregate and Aggregate Statistical</a></li>
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- <li class="toctree-l3"><a class="reference internal" href="/docs/functions-for-handling-nulls/">Functions for Handling Nulls</a></li>
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- </ul>
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- <li class="toctree-l2"><a href="javascript: void(0);">Nested Data Functions</a></li>
- <ul style="display: none">
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- <li class="toctree-l3"><a class="reference internal" href="/docs/nested-data-limitations/">Nested Data Limitations</a></li>
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- <li class="toctree-l3"><a class="reference internal" href="/docs/flatten/">FLATTEN</a></li>
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- <li class="toctree-l3"><a class="reference internal" href="/docs/kvgen/">KVGEN</a></li>
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- <li class="toctree-l3"><a class="reference internal" href="/docs/repeated-count/">REPEATED_COUNT</a></li>
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- <li class="toctree-l3"><a class="reference internal" href="/docs/repeated-contains/">REPEATED_CONTAINS</a></li>
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- </ul>
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- <li class="toctree-l2"><a class="reference internal" href="/docs/query-directory-functions/">Query Directory Functions</a></li>
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- <li class="toctree-l2"><a href="javascript: void(0);">SQL Commands</a></li>
- <ul style="">
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- <li class="toctree-l3"><a class="reference internal" href="/docs/supported-sql-commands/">Supported SQL Commands</a></li>
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- <li class="toctree-l3"><a class="reference internal" href="/docs/alter-session/">ALTER SESSION</a></li>
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- <li class="toctree-l3"><a class="reference internal" href="/docs/alter-system/">ALTER SYSTEM</a></li>
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- <li class="toctree-l3"><a class="reference internal" href="/docs/create-table-as-ctas/">CREATE TABLE AS (CTAS)</a></li>
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- <li class="toctree-l3"><a class="reference internal" href="/docs/create-view/">CREATE VIEW</a></li>
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- <li class="toctree-l3"><a class="reference internal" href="/docs/drop-view/">DROP VIEW</a></li>
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- <li class="toctree-l3"><a class="reference internal" href="/docs/describe/">DESCRIBE</a></li>
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- <li class="toctree-l3"><a class="reference internal" href="/docs/explain/">EXPLAIN</a></li>
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- <li class="toctree-l3"><a class="reference internal" href="/docs/select/">SELECT</a></li>
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- <li class="toctree-l3"><a class="reference internal" href="/docs/select-from/">SELECT FROM</a></li>
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- <li class="toctree-l3"><a class="reference internal" href="/docs/select-group-by/">SELECT GROUP BY</a></li>
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- <li class="toctree-l3"><a class="reference internal" href="/docs/select-having/">SELECT HAVING</a></li>
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- <li class="toctree-l3"><a class="reference internal" href="/docs/select-limit/">SELECT LIMIT</a></li>
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- <li class="toctree-l3"><a class="reference internal" href="/docs/select-offset/">SELECT OFFSET</a></li>
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- <li class="toctree-l3 current"><a class="reference internal" href="/docs/select-order-by/">SELECT ORDER BY</a></li>
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- <li class="toctree-l3"><a class="reference internal" href="/docs/select-union/">SELECT UNION</a></li>
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- <li class="toctree-l3"><a class="reference internal" href="/docs/select-where/">SELECT WHERE</a></li>
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- <li class="toctree-l3"><a class="reference internal" href="/docs/select-with/">SELECT WITH</a></li>
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- <li class="toctree-l3"><a class="reference internal" href="/docs/show-databases-and-show-schemas/">SHOW DATABASES and SHOW SCHEMAS</a></li>
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- <li class="toctree-l3"><a class="reference internal" href="/docs/show-files/">SHOW FILES</a></li>
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- <li class="toctree-l3"><a class="reference internal" href="/docs/show-tables/">SHOW TABLES</a></li>
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- <li class="toctree-l3"><a class="reference internal" href="/docs/use/">USE</a></li>
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- </ul>
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- <li class="toctree-l2"><a href="javascript: void(0);">SQL Conditional Expressions</a></li>
- <ul style="display: none">
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- <li class="toctree-l3"><a class="reference internal" href="/docs/case/">CASE</a></li>
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- </ul>
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- <li class="toctree-l2"><a class="reference internal" href="/docs/reserved-keywords/">Reserved Keywords</a></li>
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- <li class="toctree-l2"><a class="reference internal" href="/docs/sql-extensions/">SQL Extensions</a></li>
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- </ul>
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- <li class="toctree-l1"><a href="javascript: void(0);">Data Sources and File Formats</a></li>
- <ul style="display: none">
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- <li class="toctree-l2"><a class="reference internal" href="/docs/data-sources-and-file-formats-introduction/">Data Sources and File Formats Introduction</a></li>
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- <li class="toctree-l2"><a class="reference internal" href="/docs/hive-to-drill-data-type-mapping/">Hive-to-Drill Data Type Mapping</a></li>
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- <li class="toctree-l2"><a class="reference internal" href="/docs/deploying-and-using-a-hive-udf/">Deploying and Using a Hive UDF</a></li>
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- <li class="toctree-l2"><a class="reference internal" href="/docs/parquet-format/">Parquet Format</a></li>
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- <li class="toctree-l2"><a class="reference internal" href="/docs/json-data-model/">JSON Data Model</a></li>
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- </ul>
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- <li class="toctree-l1"><a href="javascript: void(0);">Develop Custom Functions</a></li>
- <ul style="display: none">
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- <li class="toctree-l2"><a class="reference internal" href="/docs/develop-custom-functions-introduction/">Develop Custom Functions Introduction</a></li>
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- <li class="toctree-l2"><a class="reference internal" href="/docs/develop-a-simple-function/">Develop a Simple Function</a></li>
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- <li class="toctree-l2"><a class="reference internal" href="/docs/developing-an-aggregate-function/">Developing an Aggregate Function</a></li>
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- <li class="toctree-l2"><a class="reference internal" href="/docs/adding-custom-functions-to-drill/">Adding Custom Functions to Drill</a></li>
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- <li class="toctree-l2"><a class="reference internal" href="/docs/using-custom-functions-in-queries/">Using Custom Functions in Queries</a></li>
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- <li class="toctree-l2"><a class="reference internal" href="/docs/custom-function-interfaces/">Custom Function Interfaces</a></li>
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- </ul>
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- <li class="toctree-l1"><a class="reference internal" href="/docs/troubleshooting/">Troubleshooting</a></li>
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- <li class="toctree-l1"><a href="javascript: void(0);">Developer Information</a></li>
- <ul style="display: none">
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- <li class="toctree-l2"><a href="javascript: void(0);">Develop Drill</a></li>
- <ul style="display: none">
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- <li class="toctree-l3"><a class="reference internal" href="/docs/compiling-drill-from-source/">Compiling Drill from Source</a></li>
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- <li class="toctree-l3"><a class="reference internal" href="/docs/drill-patch-review-tool/">Drill Patch Review Tool</a></li>
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- </ul>
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- <li class="toctree-l2"><a href="javascript: void(0);">Contribute to Drill</a></li>
- <ul style="display: none">
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-<p>The ORDER BY clause supports the following syntax:</p>
-<div class="highlight"><pre><code class="language-text" data-lang="text"> [ ORDER BY expression
- [ ASC | DESC ]
- [ NULLS FIRST | NULLS LAST ]
-</code></pre></div>
-<h2 id="parameters">Parameters</h2>
-
-<p><em>expression</em> </p>
-
-<p>Defines the sort order of the query result set, typically by specifying one or more columns in the select list. </p>
-
-<p>You can also specify: </p>
-
-<ul>
-<li>Columns that are not in the select list </li>
-<li>Expressions formed from one or more columns that exist in the tables referenced by the query</li>
-<li>Ordinal numbers that represent the position of select list entries (or the position of columns in the table if no select list exists)</li>
-<li>Aliases that define select list entries</li>
-</ul>
-
-<p>When the ORDER BY clause contains multiple expressions, the result set is sorted according to the first expression, then the second expression is applied to rows that have matching values from the first expression, and so on.</p>
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-<p>ASC<br>
-Specifies that the results should be returned in ascending order. If the order is not specified, ASC is the default.</p>
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-Specifies that the results should be returned in descending order. </p>
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-<p>NULLS FIRST<br>
-Specifies that NULL values should be returned before non-NULL values. </p>
-
-<p>NULLS LAST<br>
-Specifies that NULL values should be returned after non-NULL values.</p>
-
-<h2 id="usage-notes">Usage Notes</h2>
-
-<ul>
-<li>NULL values are considered "higher" than all other values. With default ascending sort order, NULL values sort at the end.<br></li>
-<li>When a query does not contain an ORDER BY clause, the system returns result sets with no predictable ordering of the rows. The same query executed twice might return the result set in a different order.<br></li>
-<li>In any parallel system, when ORDER BY does not produce a unique ordering, the order of the rows is non-deterministic. That is, if the ORDER BY expression produces duplicate values, the return order of those rows may vary from other systems or from one run the system to the next.</li>
-</ul>
-
-<h2 id="examples">Examples</h2>
-
-<p>The following example query returns sales totals for each month in descending order, listing the highest sales month to the lowest sales month:</p>
-<div class="highlight"><pre><code class="language-text" data-lang="text"> 0: jdbc:drill:> select `month`, sum(order_total)
- from orders group by `month` order by 2 desc;
- +------------+------------+
- | month | EXPR$1 |
- +------------+------------+
- | June | 950481 |
- | May | 947796 |
- | March | 836809 |
- | April | 807291 |
- | July | 757395 |
- | October | 676236 |
- | August | 572269 |
- | February | 532901 |
- | September | 373100 |
- | January | 346536 |
- +------------+------------+
-</code></pre></div>
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- <li class="toctree-l3"><a class="reference internal" href="/docs/hbase-storage-plugin/">HBase Storage Plugin</a></li>
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- <li class="toctree-l3"><a class="reference internal" href="/docs/hive-storage-plugin/">Hive Storage Plugin</a></li>
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- <li class="toctree-l3"><a class="reference internal" href="/docs/drill-default-input-format/">Drill Default Input Format</a></li>
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- </ul>
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- <li class="toctree-l2"><a class="reference internal" href="/docs/mongodb-plugin-for-apache-drill/">MongoDB Plugin for Apache Drill</a></li>
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- <li class="toctree-l2"><a class="reference internal" href="/docs/mapr-db-format/">MapR-DB Format</a></li>
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- </ul>
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- <li class="toctree-l1"><a href="javascript: void(0);">ODBC/JDBC Interfaces</a></li>
- <ul style="display: none">
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- <li class="toctree-l2"><a class="reference internal" href="/docs/interfaces-introduction/">Interfaces Introduction</a></li>
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- <li class="toctree-l2"><a class="reference internal" href="/docs/using-jdbc-with-squirrel-on-windows/">Using JDBC with SQuirreL on Windows</a></li>
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- <li class="toctree-l2"><a href="javascript: void(0);">Using ODBC on Linux and Mac OS X</a></li>
- <ul style="display: none">
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- <li class="toctree-l3"><a class="reference internal" href="/docs/odbc-on-linux-and-mac-introduction/">ODBC on Linux and Mac Introduction</a></li>
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- <li class="toctree-l3"><a class="reference internal" href="/docs/installing-the-driver-on-linux/">Installing the Driver on Linux</a></li>
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- <li class="toctree-l3"><a class="reference internal" href="/docs/installing-the-driver-on-mac-os-x/">Installing the Driver on Mac OS X</a></li>
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- <li class="toctree-l3"><a class="reference internal" href="/docs/configuring-connections-on-linux-and-mac-os-x/">Configuring Connections on Linux and Mac OS X</a></li>
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- <li class="toctree-l3"><a class="reference internal" href="/docs/driver-configuration-options/">Driver Configuration Options</a></li>
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- <li class="toctree-l3"><a class="reference internal" href="/docs/using-a-connection-string/">Using a Connection String</a></li>
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- <li class="toctree-l3"><a class="reference internal" href="/docs/advanced-properties/">Advanced Properties</a></li>
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- <li class="toctree-l3"><a class="reference internal" href="/docs/testing-the-odbc-connection/">Testing the ODBC Connection</a></li>
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- </ul>
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- <li class="toctree-l2"><a href="javascript: void(0);">Using ODBC on Windows</a></li>
- <ul style="display: none">
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- <li class="toctree-l3"><a class="reference internal" href="/docs/installing-the-driver-on-windows/">Installing the Driver on Windows</a></li>
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- <li class="toctree-l3"><a class="reference internal" href="/docs/configuring-connections-on-windows/">Configuring Connections on Windows</a></li>
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- <li class="toctree-l3"><a class="reference internal" href="/docs/connecting-to-odbc-data-sources/">Connecting to ODBC Data Sources</a></li>
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- <li class="toctree-l3"><a class="reference internal" href="/docs/tableau-examples/">Tableau Examples</a></li>
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- <li class="toctree-l3"><a class="reference internal" href="/docs/using-drill-explorer-on-windows/">Using Drill Explorer on Windows</a></li>
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- </ul>
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- <li class="toctree-l2"><a class="reference internal" href="/docs/using-microstrategy-analytics-with-apache-drill/">Using MicroStrategy Analytics with Apache Drill</a></li>
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- <li class="toctree-l2"><a class="reference internal" href="/docs/using-tibco-spotfire-with-drill/">Using Tibco Spotfire with Drill</a></li>
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- <li class="toctree-l2"><a class="reference internal" href="/docs/configuring-tibco-spotfire-server-with-drill/">Configuring Tibco Spotfire Server with Drill</a></li>
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- <li class="toctree-l2"><a class="reference internal" href="/docs/using-apache-drill-with-tableau-9-desktop/">Using Apache Drill with Tableau 9 Desktop</a></li>
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- <li class="toctree-l2"><a class="reference internal" href="/docs/using-apache-drill-with-tableau-9-server/">Using Apache Drill with Tableau 9 Server</a></li>
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- </ul>
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- <li class="toctree-l1"><a href="javascript: void(0);">Query Data</a></li>
- <ul style="display: none">
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- <li class="toctree-l2"><a class="reference internal" href="/docs/query-data-introduction/">Query Data Introduction</a></li>
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- <li class="toctree-l2"><a href="javascript: void(0);">Querying a File System</a></li>
- <ul style="display: none">
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- <li class="toctree-l3"><a class="reference internal" href="/docs/querying-a-file-system-introduction/">Querying a File System Introduction</a></li>
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- <li class="toctree-l3"><a class="reference internal" href="/docs/querying-json-files/">Querying JSON Files</a></li>
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- <li class="toctree-l3"><a class="reference internal" href="/docs/querying-parquet-files/">Querying Parquet Files</a></li>
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- <li class="toctree-l3"><a class="reference internal" href="/docs/querying-plain-text-files/">Querying Plain Text Files</a></li>
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- <li class="toctree-l3"><a class="reference internal" href="/docs/querying-directories/">Querying Directories</a></li>
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- </ul>
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- <li class="toctree-l2"><a class="reference internal" href="/docs/querying-hbase/">Querying HBase</a></li>
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- <li class="toctree-l2"><a href="javascript: void(0);">Querying Complex Data</a></li>
- <ul style="display: none">
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- <li class="toctree-l3"><a class="reference internal" href="/docs/querying-complex-data-introduction/">Querying Complex Data Introduction</a></li>
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- <li class="toctree-l3"><a class="reference internal" href="/docs/sample-data-donuts/">Sample Data: Donuts</a></li>
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- <li class="toctree-l3"><a class="reference internal" href="/docs/selecting-flat-data/">Selecting Flat Data</a></li>
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- <li class="toctree-l3"><a class="reference internal" href="/docs/using-sql-functions-clauses-and-joins/">Using SQL Functions, Clauses, and Joins</a></li>
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- <li class="toctree-l3"><a class="reference internal" href="/docs/selecting-nested-data-for-a-column/">Selecting Nested Data for a Column</a></li>
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- <li class="toctree-l3"><a class="reference internal" href="/docs/selecting-multiple-columns-within-nested-data/">Selecting Multiple Columns Within Nested Data</a></li>
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- </ul>
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- <li class="toctree-l2"><a class="reference internal" href="/docs/querying-hive/">Querying Hive</a></li>
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- <li class="toctree-l2"><a class="reference internal" href="/docs/querying-the-information-schema/">Querying the INFORMATION SCHEMA</a></li>
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- <li class="toctree-l2"><a class="reference internal" href="/docs/querying-system-tables/">Querying System Tables</a></li>
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- <li class="toctree-l2"><a class="reference internal" href="/docs/monitoring-and-canceling-queries-in-the-drill-web-ui/">Monitoring and Canceling Queries in the Drill Web UI</a></li>
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-
- </ul>
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- <li class="toctree-l1"><a href="javascript: void(0);">Performance Tuning</a></li>
- <ul style="display: none">
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- <li class="toctree-l2"><a class="reference internal" href="/docs/performance-tuning-introduction/">Performance Tuning Introduction</a></li>
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- <li class="toctree-l2"><a class="reference internal" href="/docs/partition-pruning/">Partition Pruning</a></li>
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- <li class="toctree-l2"><a class="reference internal" href="/docs/choosing-a-storage-format/">Choosing a Storage Format</a></li>
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- <li class="toctree-l2"><a href="javascript: void(0);">Query Plans and Tuning</a></li>
- <ul style="display: none">
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- <li class="toctree-l3"><a class="reference internal" href="/docs/query-plans-and-tuning-introduction/">Query Plans and Tuning Introduction</a></li>
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- <li class="toctree-l3"><a class="reference internal" href="/docs/join-planning-guidelines/">Join Planning Guidelines</a></li>
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- <li class="toctree-l3"><a class="reference internal" href="/docs/guidelines-for-optimizing-aggregation/">Guidelines for Optimizing Aggregation</a></li>
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- <li class="toctree-l3"><a class="reference internal" href="/docs/modifying-query-planning-options/">Modifying Query Planning Options</a></li>
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- <li class="toctree-l3"><a class="reference internal" href="/docs/sort-based-and-hash-based-memory-constrained-operators/">Sort-Based and Hash-Based Memory-Constrained Operators</a></li>
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- <li class="toctree-l3"><a class="reference internal" href="/docs/enabling-query-queuing/">Enabling Query Queuing</a></li>
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- <li class="toctree-l3"><a class="reference internal" href="/docs/controlling-parallelization-to-balance-performance-with-multi-tenancy/">Controlling Parallelization to Balance Performance with Multi-Tenancy</a></li>
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- </ul>
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-
-
- <li class="toctree-l2"><a href="javascript: void(0);">Identifying Performance Issues</a></li>
- <ul style="display: none">
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- <li class="toctree-l3"><a class="reference internal" href="/docs/query-plans/">Query Plans</a></li>
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- <li class="toctree-l3"><a class="reference internal" href="/docs/query-profiles/">Query Profiles</a></li>
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- </ul>
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- <li class="toctree-l2"><a href="javascript: void(0);">Performance Tuning Reference</a></li>
- <ul style="display: none">
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- <li class="toctree-l3"><a class="reference internal" href="/docs/query-profile-column-descriptions/">Query Profile Column Descriptions</a></li>
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- <li class="toctree-l3"><a class="reference internal" href="/docs/physical-operators/">Physical Operators</a></li>
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- </ul>
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- </ul>
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- <li class="toctree-l1"><a href="javascript: void(0);">Log and Debug</a></li>
- <ul style="display: none">
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- <li class="toctree-l2"><a class="reference internal" href="/docs/log-and-debug-introduction/">Log and Debug Introduction</a></li>
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- <li class="toctree-l2"><a class="reference internal" href="/docs/error-messages/">Error Messages</a></li>
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- <li class="toctree-l2"><a class="reference internal" href="/docs/modify-logback-xml/">Modify logback.xml</a></li>
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- <li class="toctree-l2"><a class="reference internal" href="/docs/review-the-java-stack-trace/">Review the Java Stack Trace</a></li>
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- </ul>
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- <li class="toctree-l1"><a href="javascript: void(0);">Query Audit Logging</a></li>
- <ul style="display: none">
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- <li class="toctree-l2"><a class="reference internal" href="/docs/getting-query-information/">Getting Query Information</a></li>
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- </ul>
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- <li class="toctree-l1 current_section "><a href="javascript: void(0);">SQL Reference</a></li>
- <ul class="current_section">
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- <li class="toctree-l2"><a class="reference internal" href="/docs/sql-reference-introduction/">SQL Reference Introduction</a></li>
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- <li class="toctree-l2"><a href="javascript: void(0);">Data Types</a></li>
- <ul style="display: none">
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- <li class="toctree-l3"><a class="reference internal" href="/docs/supported-data-types/">Supported Data Types</a></li>
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- <li class="toctree-l3"><a class="reference internal" href="/docs/date-time-and-timestamp/">Date, Time, and Timestamp</a></li>
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- <li class="toctree-l3"><a class="reference internal" href="/docs/handling-different-data-types/">Handling Different Data Types</a></li>
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- </ul>
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- <li class="toctree-l2"><a class="reference internal" href="/docs/lexical-structure/">Lexical Structure</a></li>
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- <li class="toctree-l2"><a class="reference internal" href="/docs/operators/">Operators</a></li>
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- <li class="toctree-l2"><a href="javascript: void(0);">SQL Functions</a></li>
- <ul style="display: none">
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- <li class="toctree-l3"><a class="reference internal" href="/docs/about-sql-function-examples/">About SQL Function Examples</a></li>
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- <li class="toctree-l3"><a class="reference internal" href="/docs/math-and-trig/">Math and Trig</a></li>
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- <li class="toctree-l3"><a class="reference internal" href="/docs/data-type-conversion/">Data Type Conversion</a></li>
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- <li class="toctree-l3"><a class="reference internal" href="/docs/date-time-functions-and-arithmetic/">Date/Time Functions and Arithmetic</a></li>
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- <li class="toctree-l3"><a class="reference internal" href="/docs/string-manipulation/">String Manipulation</a></li>
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- <li class="toctree-l3"><a class="reference internal" href="/docs/aggregate-and-aggregate-statistical/">Aggregate and Aggregate Statistical</a></li>
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- <li class="toctree-l3"><a class="reference internal" href="/docs/functions-for-handling-nulls/">Functions for Handling Nulls</a></li>
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- </ul>
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- <li class="toctree-l2"><a href="javascript: void(0);">Nested Data Functions</a></li>
- <ul style="display: none">
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- <li class="toctree-l3"><a class="reference internal" href="/docs/nested-data-limitations/">Nested Data Limitations</a></li>
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- <li class="toctree-l3"><a class="reference internal" href="/docs/flatten/">FLATTEN</a></li>
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- <li class="toctree-l3"><a class="reference internal" href="/docs/kvgen/">KVGEN</a></li>
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- <li class="toctree-l3"><a class="reference internal" href="/docs/repeated-count/">REPEATED_COUNT</a></li>
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- <li class="toctree-l3"><a class="reference internal" href="/docs/repeated-contains/">REPEATED_CONTAINS</a></li>
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- </ul>
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- <li class="toctree-l2"><a class="reference internal" href="/docs/query-directory-functions/">Query Directory Functions</a></li>
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- <li class="toctree-l2"><a href="javascript: void(0);">SQL Commands</a></li>
- <ul style="">
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- <li class="toctree-l3"><a class="reference internal" href="/docs/supported-sql-commands/">Supported SQL Commands</a></li>
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- <li class="toctree-l3"><a class="reference internal" href="/docs/alter-session/">ALTER SESSION</a></li>
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- <li class="toctree-l3"><a class="reference internal" href="/docs/alter-system/">ALTER SYSTEM</a></li>
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- <li class="toctree-l3"><a class="reference internal" href="/docs/create-table-as-ctas/">CREATE TABLE AS (CTAS)</a></li>
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- <li class="toctree-l3"><a class="reference internal" href="/docs/create-view/">CREATE VIEW</a></li>
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- <li class="toctree-l3"><a class="reference internal" href="/docs/drop-view/">DROP VIEW</a></li>
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- <li class="toctree-l3"><a class="reference internal" href="/docs/describe/">DESCRIBE</a></li>
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- <li class="toctree-l3"><a class="reference internal" href="/docs/explain/">EXPLAIN</a></li>
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- <li class="toctree-l3"><a class="reference internal" href="/docs/select/">SELECT</a></li>
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- <li class="toctree-l3"><a class="reference internal" href="/docs/select-from/">SELECT FROM</a></li>
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- <li class="toctree-l3"><a class="reference internal" href="/docs/select-group-by/">SELECT GROUP BY</a></li>
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- <li class="toctree-l3"><a class="reference internal" href="/docs/select-having/">SELECT HAVING</a></li>
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- <li class="toctree-l3"><a class="reference internal" href="/docs/select-limit/">SELECT LIMIT</a></li>
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- <li class="toctree-l3"><a class="reference internal" href="/docs/select-offset/">SELECT OFFSET</a></li>
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- <li class="toctree-l3"><a class="reference internal" href="/docs/select-order-by/">SELECT ORDER BY</a></li>
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- <li class="toctree-l3"><a class="reference internal" href="/docs/select-union/">SELECT UNION</a></li>
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- <li class="toctree-l3 current"><a class="reference internal" href="/docs/select-where/">SELECT WHERE</a></li>
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- <li class="toctree-l3"><a class="reference internal" href="/docs/select-with/">SELECT WITH</a></li>
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- <li class="toctree-l3"><a class="reference internal" href="/docs/show-databases-and-show-schemas/">SHOW DATABASES and SHOW SCHEMAS</a></li>
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- <li class="toctree-l3"><a class="reference internal" href="/docs/show-files/">SHOW FILES</a></li>
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- <li class="toctree-l3"><a class="reference internal" href="/docs/show-tables/">SHOW TABLES</a></li>
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- <li class="toctree-l3"><a class="reference internal" href="/docs/use/">USE</a></li>
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- </ul>
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- <li class="toctree-l2"><a href="javascript: void(0);">SQL Conditional Expressions</a></li>
- <ul style="display: none">
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- <li class="toctree-l3"><a class="reference internal" href="/docs/case/">CASE</a></li>
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- </ul>
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- <li class="toctree-l2"><a class="reference internal" href="/docs/reserved-keywords/">Reserved Keywords</a></li>
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- <li class="toctree-l2"><a class="reference internal" href="/docs/sql-extensions/">SQL Extensions</a></li>
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- </ul>
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- <li class="toctree-l1"><a href="javascript: void(0);">Data Sources and File Formats</a></li>
- <ul style="display: none">
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- <li class="toctree-l2"><a class="reference internal" href="/docs/data-sources-and-file-formats-introduction/">Data Sources and File Formats Introduction</a></li>
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- <li class="toctree-l2"><a class="reference internal" href="/docs/hive-to-drill-data-type-mapping/">Hive-to-Drill Data Type Mapping</a></li>
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- <li class="toctree-l2"><a class="reference internal" href="/docs/deploying-and-using-a-hive-udf/">Deploying and Using a Hive UDF</a></li>
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- <li class="toctree-l2"><a class="reference internal" href="/docs/parquet-format/">Parquet Format</a></li>
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- <li class="toctree-l2"><a class="reference internal" href="/docs/json-data-model/">JSON Data Model</a></li>
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- </ul>
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- <li class="toctree-l1"><a href="javascript: void(0);">Develop Custom Functions</a></li>
- <ul style="display: none">
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- <li class="toctree-l2"><a class="reference internal" href="/docs/develop-custom-functions-introduction/">Develop Custom Functions Introduction</a></li>
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- <li class="toctree-l2"><a class="reference internal" href="/docs/develop-a-simple-function/">Develop a Simple Function</a></li>
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- <li class="toctree-l2"><a class="reference internal" href="/docs/developing-an-aggregate-function/">Developing an Aggregate Function</a></li>
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- <li class="toctree-l2"><a class="reference internal" href="/docs/adding-custom-functions-to-drill/">Adding Custom Functions to Drill</a></li>
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- <li class="toctree-l2"><a class="reference internal" href="/docs/using-custom-functions-in-queries/">Using Custom Functions in Queries</a></li>
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- <li class="toctree-l2"><a class="reference internal" href="/docs/custom-function-interfaces/">Custom Function Interfaces</a></li>
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- </ul>
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- <li class="toctree-l1"><a class="reference internal" href="/docs/troubleshooting/">Troubleshooting</a></li>
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- <ul style="display: none">
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- <li class="toctree-l2"><a href="javascript: void(0);">Develop Drill</a></li>
- <ul style="display: none">
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- <li class="toctree-l3"><a class="reference internal" href="/docs/compiling-drill-from-source/">Compiling Drill from Source</a></li>
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- <li class="toctree-l3"><a class="reference internal" href="/docs/drill-patch-review-tool/">Drill Patch Review Tool</a></li>
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- </ul>
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- <li class="toctree-l2"><a href="javascript: void(0);">Contribute to Drill</a></li>
- <ul style="display: none">
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- <li class="toctree-l3"><a class="reference internal" href="/docs/apache-drill-contribution-guidelines/">Apache Drill Contribution Guidelines</a></li>
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- <li class="toctree-l3"><a class="reference internal" href="/docs/apache-drill-contribution-ideas/">Apache Drill Contribution Ideas</a></li>
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- </ul>
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- <li class="toctree-l2"><a href="javascript: void(0);">Design Docs</a></li>
- <ul style="display: none">
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- <li class="toctree-l3"><a class="reference internal" href="/docs/drill-plan-syntax/">Drill Plan Syntax</a></li>
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- <li class="toctree-l3"><a class="reference internal" href="/docs/rpc-overview/">RPC Overview</a></li>
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- <li class="toctree-l3"><a class="reference internal" href="/docs/query-stages/">Query Stages</a></li>
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- <li class="toctree-l3"><a class="reference internal" href="/docs/useful-research/">Useful Research</a></li>
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- <li class="toctree-l3"><a class="reference internal" href="/docs/value-vectors/">Value Vectors</a></li>
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- </ul>
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- </ul>
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- <li class="toctree-l1"><a href="javascript: void(0);">Release Notes</a></li>
- <ul style="display: none">
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- <li class="toctree-l2"><a class="reference internal" href="/docs/apache-drill-0-5-0-release-notes/">Apache Drill 0.5.0 Release Notes</a></li>
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- <li class="toctree-l2"><a class="reference internal" href="/docs/apache-drill-0-4-0-release-notes/">Apache Drill 0.4.0 Release Notes</a></li>
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- <li class="toctree-l2"><a class="reference internal" href="/docs/apache-drill-m1-release-notes-apache-drill-alpha/">Apache Drill M1 Release Notes (Apache Drill Alpha)</a></li>
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- <li class="toctree-l2"><a class="reference internal" href="/docs/apache-drill-m1-release-notes-apache-drill-alpha/">Apache Drill M1 Release Notes (Apache Drill Alpha)</a></li>
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- <li class="toctree-l2"><a class="reference internal" href="/docs/apache-drill-0-6-0-release-notes/">Apache Drill 0.6.0 Release Notes</a></li>
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- <li class="toctree-l2"><a class="reference internal" href="/docs/apache-drill-0-7-0-release-notes/">Apache Drill 0.7.0 Release Notes</a></li>
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- <li class="toctree-l2"><a class="reference internal" href="/docs/apache-drill-0-8-0-release-notes/">Apache Drill 0.8.0 Release Notes</a></li>
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- <li class="toctree-l2"><a class="reference internal" href="/docs/apache-drill-0-9-0-release-notes/">Apache Drill 0.9.0 Release Notes</a></li>
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- <li class="toctree-l2"><a class="reference internal" href="/docs/apache-drill-1-0-0-release-notes/">Apache Drill 1.0.0 Release Notes</a></li>
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- <li class="toctree-l1"><a href="javascript: void(0);">Sample Datasets</a></li>
- <ul style="display: none">
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- (select sum(o2.order_total) from hive.orders o2
- where o1.cust_id=o2.cust_id and state='ca') as ca_sales
- from hive.orders o1 where o1.state='ny' group by o1.cust_id
- order by cust_id limit 20;
- +------------+------------+------------+
- | cust_id | ny_sales | ca_sales |
- +------------+------------+------------+
- | 1001 | 72 | 47 |
- | 1002 | 108 | 198 |
- | 1003 | 83 | null |
- | 1004 | 86 | 210 |
- | 1005 | 168 | 153 |
- | 1006 | 29 | 326 |
- | 1008 | 105 | 168 |
- | 1009 | 443 | 127 |
- | 1010 | 75 | 18 |
- | 1012 | 110 | null |
- | 1013 | 19 | null |
- | 1014 | 106 | 162 |
- | 1015 | 220 | 153 |
- | 1016 | 85 | 159 |
- | 1017 | 82 | 56 |
- | 1019 | 37 | 196 |
- | 1020 | 193 | 165 |
- | 1022 | 124 | null |
- | 1023 | 166 | 149 |
- | 1024 | 233 | null |
- +------------+------------+------------+
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- <li class="toctree-l3"><a class="reference internal" href="/docs/drill-explorer-introduction/">Drill Explorer Introduction</a></li>
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- <li class="toctree-l3"><a class="reference internal" href="/docs/connecting-drill-explorer-to-data/">Connecting Drill Explorer to Data</a></li>
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- <li class="toctree-l3"><a class="reference internal" href="/docs/browsing-data-and-defining-views/">Browsing Data and Defining Views</a></li>
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- <li class="toctree-l2"><a href="javascript: void(0);">Using Drill with BI Tools</a></li>
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- <li class="toctree-l3"><a class="reference internal" href="/docs/using-drill-with-bi-tools-introduction/">Using Drill with BI Tools Introduction</a></li>
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- <li class="toctree-l3"><a class="reference internal" href="/docs/using-microstrategy-analytics-with-apache-drill/">Using MicroStrategy Analytics with Apache Drill</a></li>
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- <li class="toctree-l3"><a class="reference internal" href="/docs/using-tibco-spotfire-desktop-with-drill/">Using Tibco Spotfire Desktop with Drill</a></li>
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- <li class="toctree-l3"><a class="reference internal" href="/docs/configuring-tibco-spotfire-server-with-drill/">Configuring Tibco Spotfire Server with Drill</a></li>
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- <li class="toctree-l3"><a class="reference internal" href="/docs/using-apache-drill-with-tableau-9-desktop/">Using Apache Drill with Tableau 9 Desktop</a></li>
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- <li class="toctree-l3"><a class="reference internal" href="/docs/using-apache-drill-with-tableau-9-server/">Using Apache Drill with Tableau 9 Server</a></li>
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- <li class="toctree-l3"><a class="reference internal" href="/docs/configuring-jreport-with-drill/">Configuring JReport with Drill</a></li>
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- </ul>
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- </ul>
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- <li class="toctree-l1 current_section "><a href="javascript: void(0);">Query Data</a></li>
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- <li class="toctree-l2"><a class="reference internal" href="/docs/query-data-introduction/">Query Data Introduction</a></li>
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- <li class="toctree-l2"><a href="javascript: void(0);">Querying a File System</a></li>
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- <li class="toctree-l3"><a class="reference internal" href="/docs/querying-a-file-system-introduction/">Querying a File System Introduction</a></li>
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- <li class="toctree-l3"><a class="reference internal" href="/docs/querying-json-files/">Querying JSON Files</a></li>
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- <li class="toctree-l3"><a class="reference internal" href="/docs/querying-parquet-files/">Querying Parquet Files</a></li>
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- <li class="toctree-l3"><a class="reference internal" href="/docs/querying-plain-text-files/">Querying Plain Text Files</a></li>
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- <li class="toctree-l3"><a class="reference internal" href="/docs/querying-directories/">Querying Directories</a></li>
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- </ul>
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- <li class="toctree-l2"><a class="reference internal" href="/docs/querying-hbase/">Querying HBase</a></li>
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- <li class="toctree-l3"><a class="reference internal" href="/docs/querying-complex-data-introduction/">Querying Complex Data Introduction</a></li>
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- <li class="toctree-l3"><a class="reference internal" href="/docs/sample-data-donuts/">Sample Data: Donuts</a></li>
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- <li class="toctree-l3"><a class="reference internal" href="/docs/selecting-flat-data/">Selecting Flat Data</a></li>
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- <li class="toctree-l3"><a class="reference internal" href="/docs/using-sql-functions-clauses-and-joins/">Using SQL Functions, Clauses, and Joins</a></li>
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- <li class="toctree-l3"><a class="reference internal" href="/docs/selecting-nested-data-for-a-column/">Selecting Nested Data for a Column</a></li>
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- <li class="toctree-l3"><a class="reference internal" href="/docs/selecting-multiple-columns-within-nested-data/">Selecting Multiple Columns Within Nested Data</a></li>
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- </ul>
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- <li class="toctree-l2"><a class="reference internal" href="/docs/querying-hive/">Querying Hive</a></li>
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- <li class="toctree-l2"><a class="reference internal" href="/docs/querying-the-information-schema/">Querying the INFORMATION SCHEMA</a></li>
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- <li class="toctree-l2 current"><a class="reference internal" href="/docs/monitoring-and-canceling-queries-in-the-drill-web-ui/">Monitoring and Canceling Queries in the Drill Web UI</a></li>
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- </ul>
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- <li class="toctree-l1"><a href="javascript: void(0);">Performance Tuning</a></li>
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- <li class="toctree-l2"><a class="reference internal" href="/docs/choosing-a-storage-format/">Choosing a Storage Format</a></li>
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- <li class="toctree-l2"><a href="javascript: void(0);">Query Plans and Tuning</a></li>
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- <li class="toctree-l3"><a class="reference internal" href="/docs/guidelines-for-optimizing-aggregation/">Guidelines for Optimizing Aggregation</a></li>
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- <li class="toctree-l3"><a class="reference internal" href="/docs/modifying-query-planning-options/">Modifying Query Planning Options</a></li>
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- <li class="toctree-l3"><a class="reference internal" href="/docs/sort-based-and-hash-based-memory-constrained-operators/">Sort-Based and Hash-Based Memory-Constrained Operators</a></li>
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- <li class="toctree-l3"><a class="reference internal" href="/docs/enabling-query-queuing/">Enabling Query Queuing</a></li>
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- <li class="toctree-l3"><a class="reference internal" href="/docs/controlling-parallelization-to-balance-performance-with-multi-tenancy/">Controlling Parallelization to Balance Performance with Multi-Tenancy</a></li>
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- </ul>
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- <li class="toctree-l2"><a href="javascript: void(0);">Identifying Performance Issues</a></li>
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- <li class="toctree-l3"><a class="reference internal" href="/docs/query-plans/">Query Plans</a></li>
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- <li class="toctree-l3"><a class="reference internal" href="/docs/query-profiles/">Query Profiles</a></li>
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- <li class="toctree-l2"><a href="javascript: void(0);">Performance Tuning Reference</a></li>
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- <li class="toctree-l3"><a class="reference internal" href="/docs/query-profile-column-descriptions/">Query Profile Column Descriptions</a></li>
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- <li class="toctree-l3"><a class="reference internal" href="/docs/physical-operators/">Physical Operators</a></li>
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- </ul>
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- <li class="toctree-l1"><a href="javascript: void(0);">Log and Debug</a></li>
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- <li class="toctree-l2"><a class="reference internal" href="/docs/error-messages/">Error Messages</a></li>
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- <li class="toctree-l2"><a class="reference internal" href="/docs/modify-logback-xml/">Modify logback.xml</a></li>
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- <li class="toctree-l2"><a class="reference internal" href="/docs/review-the-java-stack-trace/">Review the Java Stack Trace</a></li>
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- <li class="toctree-l2"><a class="reference internal" href="/docs/query-audit-logging/">Query Audit Logging</a></li>
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- </ul>
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- <li class="toctree-l1"><a href="javascript: void(0);">SQL Reference</a></li>
- <ul style="display: none">
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- <li class="toctree-l2"><a class="reference internal" href="/docs/sql-reference-introduction/">SQL Reference Introduction</a></li>
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- <li class="toctree-l2"><a href="javascript: void(0);">Data Types</a></li>
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- <li class="toctree-l3"><a class="reference internal" href="/docs/supported-data-types/">Supported Data Types</a></li>
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- <li class="toctree-l3"><a class="reference internal" href="/docs/date-time-and-timestamp/">Date, Time, and Timestamp</a></li>
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- <li class="toctree-l3"><a class="reference internal" href="/docs/handling-different-data-types/">Handling Different Data Types</a></li>
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- </ul>
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- <li class="toctree-l2"><a class="reference internal" href="/docs/lexical-structure/">Lexical Structure</a></li>
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- <li class="toctree-l2"><a class="reference internal" href="/docs/operators/">Operators</a></li>
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- <li class="toctree-l2"><a href="javascript: void(0);">SQL Functions</a></li>
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- <li class="toctree-l3"><a class="reference internal" href="/docs/about-sql-function-examples/">About SQL Function Examples</a></li>
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- <li class="toctree-l3"><a class="reference internal" href="/docs/math-and-trig/">Math and Trig</a></li>
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- <li class="toctree-l3"><a class="reference internal" href="/docs/data-type-conversion/">Data Type Conversion</a></li>
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- <li class="toctree-l3"><a class="reference internal" href="/docs/date-time-functions-and-arithmetic/">Date/Time Functions and Arithmetic</a></li>
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- <li class="toctree-l3"><a class="reference internal" href="/docs/string-manipulation/">String Manipulation</a></li>
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- <li class="toctree-l3"><a class="reference internal" href="/docs/aggregate-and-aggregate-statistical/">Aggregate and Aggregate Statistical</a></li>
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- <li class="toctree-l3"><a class="reference internal" href="/docs/functions-for-handling-nulls/">Functions for Handling Nulls</a></li>
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- </ul>
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- <li class="toctree-l2"><a href="javascript: void(0);">SQL Window Functions</a></li>
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- <li class="toctree-l3"><a class="reference internal" href="/docs/sql-window-functions-introduction/">SQL Window Functions Introduction</a></li>
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- <li class="toctree-l3"><a class="reference internal" href="/docs/aggregate-window-functions/">Aggregate Window Functions</a></li>
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- <li class="toctree-l3"><a class="reference internal" href="/docs/ranking-window-functions/">Ranking Window Functions</a></li>
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- <li class="toctree-l3"><a class="reference internal" href="/docs/value-window-functions/">Value Window Functions</a></li>
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- <li class="toctree-l3"><a class="reference internal" href="/docs/sql-window-functions-examples/">SQL Window Functions Examples</a></li>
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- <li class="toctree-l3"><a class="reference internal" href="/docs/nested-data-limitations/">Nested Data Limitations</a></li>
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- <li class="toctree-l3"><a class="reference internal" href="/docs/flatten/">FLATTEN</a></li>
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- <li class="toctree-l3"><a class="reference internal" href="/docs/kvgen/">KVGEN</a></li>
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- <li class="toctree-l3"><a class="reference internal" href="/docs/repeated-count/">REPEATED_COUNT</a></li>
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- <li class="toctree-l3"><a class="reference internal" href="/docs/repeated-contains/">REPEATED_CONTAINS</a></li>
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- </ul>
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- <li class="toctree-l2"><a class="reference internal" href="/docs/query-directory-functions/">Query Directory Functions</a></li>
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- <li class="toctree-l3"><a class="reference internal" href="/docs/describe/">DESCRIBE</a></li>
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- <li class="toctree-l3"><a class="reference internal" href="/docs/drop-view/">DROP VIEW</a></li>
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- <li class="toctree-l3"><a class="reference internal" href="/docs/from-clause/">FROM Clause</a></li>
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- <li class="toctree-l3"><a class="reference internal" href="/docs/group-by-clause/">GROUP BY Clause</a></li>
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- <li class="toctree-l3"><a class="reference internal" href="/docs/having-clause/">HAVING Clause</a></li>
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- <li class="toctree-l3"><a class="reference internal" href="/docs/limit-clause/">LIMIT Clause</a></li>
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- <li class="toctree-l3"><a class="reference internal" href="/docs/offset-clause/">OFFSET Clause</a></li>
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- <li class="toctree-l3"><a class="reference internal" href="/docs/order-by-clause/">ORDER BY Clause</a></li>
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- <li class="toctree-l3"><a class="reference internal" href="/docs/union-set-operator/">UNION Set Operator</a></li>
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- <li class="toctree-l3"><a class="reference internal" href="/docs/where-clause/">WHERE Clause</a></li>
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-<div class="main-content-wrapper">
- <div class="main-content">
-
-
- <a class="edit-link" href="https://github.com/apache/drill/blob/gh-pages/_docs/query-data/080-monitoring-and-canceling-queries-in-the-Drill-Web-UI.md" target="_blank"><i class="fa fa-pencil-square-o"></i></a>
-
-
- <div class="int_title left">
- <h1>Monitoring and Canceling Queries in the Drill Web UI</h1>
-
- </div>
-
- <link href="/css/docpage.css" rel="stylesheet" type="text/css">
-
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-
- <p>You can monitor and cancel queries from the Drill Web UI if you are <a href="/docs/configuring-web-ui-and-rest-api-security/">authorized</a> to do so. To access the Drill
-Web UI, the Drillbit process must be running on the Drill node that you use to
-access the Drill Web UI.</p>
-
-<p>To monitor or cancel a query from the Drill Web UI, complete the following
-steps:</p>
-
-<ol>
-<li><p>Navigate to the Drill Web UI at <code><drill_node_ip_address>:8047.</code><br>
-When you access the Drill Web UI, you see some general information about Drill
-running in your cluster, such as the nodes running the Drillbit process, the
-various ports Drill is using, and the amount of direct memory assigned to
-Drill.<br>
-<img src="/docs/img/7.png" alt="drill query flow"></p></li>
-<li><p>Select <strong>Profiles</strong> in the toolbar. A list of running and completed queries appears. Drill assigns a query ID to each query and lists the Foreman node. The Foreman is the Drillbit node that receives the query from the client or application. The Foreman drives the entire query.
-<img src="/docs/img/51.png" alt="drill query flow"> </p></li>
-<li><p>Click the <strong>Query ID</strong> for the query that you want to monitor or cancel. The Query and Planning window appears.<br>
-<img src="/docs/img/4.png" alt="drill query flow"></p></li>
-<li><p>Select <strong>Edit Query</strong>.</p></li>
-<li><p>Click <strong>Cancel query **to cancel the</strong> query. The following message appears:
-<img src="/docs/img/46.png" alt="drill query flow"> </p></li>
-<li><p>Optionally, you can re-run the query to see a query summary in this window.</p></li>
-</ol>
-
-
-
- <div class="doc-nav">
-
- <span class="previous-toc"><a href="/docs/querying-system-tables/">\u2190 Querying System Tables</a></span><span class="next-toc"><a href="/docs/performance-tuning/">Performance Tuning \u2192</a></span>
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-<div id="footer" class="mw">
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-Apache and the Apache feather logo are trademarks of The Apache Software Foundation. Other names appearing on the site may be trademarks of their respective owners.<br/><br/>
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http://git-wip-us.apache.org/repos/asf/drill-site/blob/d42f2cdd/docs/odbc-jdbc-interfaces/using-drill-with-bi-tools/050-configuring-spotfire-server.md
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diff --git a/docs/odbc-jdbc-interfaces/using-drill-with-bi-tools/050-configuring-spotfire-server.md b/docs/odbc-jdbc-interfaces/using-drill-with-bi-tools/050-configuring-spotfire-server.md
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--- a/docs/odbc-jdbc-interfaces/using-drill-with-bi-tools/050-configuring-spotfire-server.md
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----
title: "Configuring Tibco Spotfire Server with Drill"
parent: "Using Drill with BI Tools"
---
This document describes how to configure Tibco Spotfire Server (TSS) to integrate with Apache Drill and explore multiple data formats instantly on Hadoop. Users can combine these powerful platforms to rapidly gain analytical access to a wide variety of data types.
Complete the following steps to configure and use Apache Drill with TSS:
1. Install the Drill JDBC driver with TSS.
2. Configure the Drill Data Source Template in TSS with the TSS configuration tool.
3. Configure Drill data sources with Tibco Spotfire Desktop and Information Designer.
4. Query and analyze various data formats with Tibco Spotfire and Drill.
----------
### Step 1: Install and Configure the Drill JDBC Driver
Drill provides standard JDBC connectivity, making it easy to integrate data exploration capabilities on complex, schema-less data sets. Tibco Spotfire Server (TSS) requires Drill 1.0 or later, whic
h incudes the JDBC driver. The JDBC driver is bundled with the Drill configuration files, and it is recommended that you use the JDBC driver that is shipped with the specific Drill version.
For general instructions to install the Drill JDBC driver, see [Using JDBC](http://drill.apache.org/docs/using-jdbc/).
Complete the following steps to install and configure the JDBC driver for TSS:
1. Locate the JDBC driver in the Drill installation directory:
`<drill-home>/jars/jdbc-driver/drill-jdbc-all-<drill-version>.jar`
For example, on a MapR cluster:
`/opt/mapr/drill/drill-1.0.0/jars/jdbc-driver/drill-jdbc-all-1.0.0-SNAPSHOT.jar`
2. Locate the TSS library directory and copy the JDBC driver file to that directory:
`<TSS-home-directory>/tomcat/lib`
For example, on a Linux server:
`/usr/local/bin/tibco/tss/6.0.3/tomcat/lib`
For example, on a Windows server:
`C:\Program Files\apache-tomcat\lib`
3. Restart TSS to load the JDBC driver.
4. Verify that th
e TSS system can resolve the hostnames of the ZooKeeper nodes for the Drill cluster. You can do this by validating that DNS is properly configured for the TSS system and all the ZooKeeper nodes. Alternatively, you can add the hostnames and IP addresses of the ZooKeeper nodes to the TSS system hosts file.
For Linux systems, the hosts file is located here:
`/etc/hosts`
For Windows systems, the hosts file is located here:
`%WINDIR%\system32\drivers\etc\hosts`
----------
### Step 2: Configure the Drill Data Source Template in TSS
The Drill Data Source template can now be configured with the TSS Configuration Tool. The Windows-based TSS Configuration Tool is recommended. If TSS is installed on a Linux system, you also need to install TSS on a small Windows-based system so you can utilize the Configuration Tool. In this case, it is also recommended that you install the Drill JDBC driver on the TSS Windows system.
1. Click **Start > All Programs > TIBCO Spotfire Serve
r > Configure TIBCO Spotfire Server**. 
2. Enter the Configuration Tool password that was specified when TSS was initially installed.
3. Once the Configuration Tool has connected to TSS, click the **Configuration** tab, then **Data Source Templates**. 
4. In the Data Source Templates window, click the **New** button at the bottom of the window. 
5. Provide a name for the data source template, then copy the following XML template into the **Data Source Template** box. When complete, click **OK**. 
6. The new entry will now be available in the data source template. Check the box next to the new entry, then click **Save Configuration**. 
7. Select Database as the destination and click Next. 
8. Add a comment to the updated configuration and click **Finish**.
9. A response window is displayed to state that the configuration was successfully uploaded to TSS. Click **OK**. 
10. Restart TSS to enable it to use the Drill data source template.
#### XML Template
Make sure that you enter the correct ZooKeeper node name instead of `<zk-node>`, as well as the correct Drill cluster name instead of `<drill-cluster-name>` in the example below. This is just a template that will appear whenever a data source is configured. The hostnames of ZooKeeper nodes and the Drill cluster name can be found in the `$DRILL_HOME/conf/drill-override.conf` file on any of the Drill nodes in the cluster.
<jdbc-type-settings>
<type-name>drill</ty
pe-name>
<driver>org.apache.drill.jdbc.Driver</driver>
<connection-url-pattern>jdbc:drill:zk=<zk-node>:5181/drill/<drill-cluster-name>-drillbits</connection-url-pattern>
<ping-command>SELECT 1 FROM sys.version</ping-command>
<supports-catalogs>true</supports-catalogs>
<supports-schemas>true</supports-schemas>
<supports-procedures>false</supports-procedures>
<table-expression-pattern>[$$schema$$.]$$table$$</table-expression-pattern>
<column-name-pattern>`$$name$$`</column-name-pattern>
<table-name-pattern>`$$name$$`</table-name-pattern>
<schema-name-pattern>`$$name$$`</schema-name-pattern>
<catalog-name-pattern>`$$name$$`</catalog-name-pattern>
<procedure-name-pattern>`$$name$$`</procedure-name-pattern>
<column-alias-pattern>`$$name$$`</column-alias-pattern>
<java-to-sql-type-conversions>
<type-mapping>
<from max-length="32672">String</from>
<to>VARCHAR($$value$$)</to>
</type-mapping>
<type-mappin
g>
<from>String</from>
<to>VARCHAR(32672)</to>
</type-mapping>
<type-mapping>
<from>Integer</from>
<to>INTEGER</to>
</type-mapping>
</java-to-sql-type-conversions>
</jdbc-type-settings>
----------
### Step 3: Configure Drill Data Sources with Tibco Spotfire Desktop
To configure Drill data sources in TSS, you need to use the Tibco Spotfire Desktop client.
1. Open Tibco Spotfire Desktop. 
2. Log into TSS. 
3. Select the deployment area in TSS to be used. 
4. Click **Tools > Information Designer**. 
5. In the Information Designer, click **New > Data Source**. 
6. In the Data Source window, enter the name for the data source. Select the Drill Data Source template created in Step 2 as the type. Update the connection URL with the correct hostname of the ZooKeeper node(s) and the Drill cluster name. Note: The Zookeeper node(s) hostname(s) and Drill cluster name can be found in the `$DRILL_HOME/conf/drill-override.conf` file on any of the Drill nodes in the cluster. Enter the username and password used to connect to Drill. When completed, click **Save**. 
7. In the Save As window, verify the name and the folder where you want to save the new data source in TSS. Click **Save** when done. TSS will now validate the information and save the new data source in TSS.
8. When the data source is saved, it will appear in the **Data Sources** tab, and you will be able to navigate the schema. 
----------
### Step 4: Query and Analyze the Data
After the Drill data source has been configured in the Information Designer, the information elements can be defined.
1. In this example all the columns of a Hive table have been defined, using the Drill data source, and added to an information link. 
2. The SQL syntax to retrieve the data can be validated by clicking the **SQL** button. Many other operations can be performed in Information Link, including joins, filters, and so on. See the Tibco Spotfire documentation for details.
3. You can now import the data of this table into TSS by clicking the **Open Data** button. 
The data is now available in Tibco Spotfire Desktop to create various reports and tables as needed, and to be shared. For more information about creating charts, tables and reports, see the Tib
co Spotfire documentation.
...
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http://git-wip-us.apache.org/repos/asf/drill-site/blob/d42f2cdd/docs/odbc-jdbc-interfaces/using-drill-with-bi-tools/080-configuring-jreport.md
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diff --git a/docs/odbc-jdbc-interfaces/using-drill-with-bi-tools/080-configuring-jreport.md b/docs/odbc-jdbc-interfaces/using-drill-with-bi-tools/080-configuring-jreport.md
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----
title: "Configuring JReport with Drill"
parent: "Using Drill with BI Tools"
---
JReport is an embeddable BI solution that empowers users to analyze data and create reports and dashboards. JReport accesses data from Hadoop systems through Apache Drill. By visualizing data through Drill, users can perform their own reporting and data discovery for agile, on-the-fly decision-making.
You can use JReport 13.1 and the Apache Drill JDBC Driver to easily extract data and visualize it, creating reports and dashboards that you can embed into your own applications. Complete the following simple steps to use Apache Drill with JReport:
1. Install the Drill JDBC Driver with JReport.
2. Create a new JReport Catalog to manage the Drill connection.
3. Use JReport Designer to query the data and create a report.
----------
### Step 1: Install the Drill JDBC Driver with JReport
Drill provides standard JDBC connectivity to integrate with JReport. JReport 13.1 requires Drill 1.0 or later.
For g
eneral instructions on installing the Drill JDBC driver, see [Using JDBC]({{ site.baseurl }}/docs/using-the-jdbc-driver/).
1. Locate the JDBC driver in the Drill installation directory on any node where Drill is installed on the cluster:
<drill-home>/jars/jdbc-driver/drill-jdbc-all-<drill-version>.jar
2. Copy the Drill JDBC driver into the JReport `lib` folder:
%REPORTHOME%\lib\
For example, on Windows, copy the Drill JDBC driver jar file into:
C:\JReport\Designer\lib\drill-jdbc-all-1.0.0.jar
3. Add the location of the JAR file to the JReport CLASSPATH variable. On Windows, edit the `C:\JReport\Designer\bin\setenv.bat` file:
4. Verify that the JReport system can resolve the hostnames of the ZooKeeper nodes of the Drill cluster. You can do this by configuring DNS for all of the systems. Alternatively, you can edit the hosts file on the JReport system to include the host
names and IP addresses of all the ZooKeeper nodes used with the Drill cluster. For Linux systems, the hosts file is located at `/etc/hosts`. For Windows systems, the hosts file is located at `%WINDIR%\system32\drivers\etc\hosts` Here is an example of a Windows hosts file: 
----------
### Step 2: Create a New JReport Catalog to Manage the Drill Connection
1. Click Create **New -> Catalog\u2026**
2. Provide a catalog file name and click **\u2026** to choose the file-saving location.
3. Click **View -> Catalog Browser**.
4. Right-click **Data Source 1** and select **Add JDBC Connection**.
5. Fill in the **Driver**, **URL**, **User**, and **Password** fields. 
6. Click **Options** and select the **Qualifier** tab.
7. In the **Quote Qualifier** section, choose **User Defined** and change the quote character from \u201c to ` (backtick). 
8. Click **OK**. JReport will verify the connection and save all information.
9. Add tables and views to the JReport catalog by right-clicking the connection node and choosing **Add Table**. Now you can browse the schemas and add specific tables that you want to make available for building queries. 
10. Click **Done** when you have added all the tables you need.
### Step 3: Use JReport Designer
1. In the Catalog Browser, right-click **Queries** and select **Add Query\u2026**
2. Define a JReport query by using the Query Editor. You can also import your own SQL statements. 
3. Click **OK** to close the Query Editor, and click the **Save Catalog** button to save your progress to the catalog file.
**Note**: If the report returns errors, you may need to edit the query and add the
schema in front of the table name: `select column from schema.table_name` You can do this by clicking the **SQL** button on the Query Editor.
4. Use JReport Designer to query the data and create a report. 
\ No newline at end of file
http://git-wip-us.apache.org/repos/asf/drill-site/blob/d42f2cdd/docs/odbc-jdbc-interfaces/using-odbc-on-windows/005-odbc-on-windows-introduction.md
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diff --git a/docs/odbc-jdbc-interfaces/using-odbc-on-windows/005-odbc-on-windows-introduction.md b/docs/odbc-jdbc-interfaces/using-odbc-on-windows/005-odbc-on-windows-introduction.md
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-
----
-title: "ODBC on Windows Introduction"
-parent: "Using ODBC on Windows"
----
-The MapR Drill ODBC driver provides BI tools access to Drill\u2019s flexible query
-capabilities so that users can quickly explore various data sources. The MapR
-Drill ODBC driver includes Drill Explorer, which is a simple user interface
-that enables users to examine the content of data sources and create views
-before visualizing the data in a BI tool.
-
-Once you install the MapR Drill ODBC Driver, you can create ODBC DSNs to Drill
-data sources using the ODBC Administrator tool and then use the DSNs to access
-the data from BI tools that work with ODBC. Drill can connect to data with
-well-defined schemas, such as Hive. Drill can also connect directly to data
-that is self-describing, such as HBase, Parquet, JSON, CSV, and TSV.
-
-Complete the following steps to connect to a Drill data source from a BI tool
-using ODBC:
-
- * [Step 1. Install the MapR Drill ODBC Driver]({{ site.baseurl }}/docs/step-1-install-the-mapr-drill-odbc-driver-on-windows)
- * [Step 2. Configure ODBC Connections to Drill Data Sources]({{ site.baseurl }}/docs/step-2-configure-odbc-connections-to-drill-data-sources)
- * [Step 3. Connect to Drill Data Sources from a BI Tool]({{ site.baseurl }}/docs/step-3-connect-to-drill-data-sources-from-a-bi-tool)
-
-For examples of how you can use the MapR Drill ODBC Driver to connect to Drill
-Data Sources from BI tools, see [Step 3. Connect to Drill Data Sources from a
-BI Tool]({{ site.baseurl }}/docs/step-3-connect-to-drill-data-sources-from-a-bi-tool). While the documentation includes examples for Tableau, you can use
-this driver with any BI tool that works with ODBC, such as Excel,
-MicroStrategy, and Toad.
-
-The following figure shows how a BI tool on Windows uses an ODBC connection to
-access data from a Hive table:
-
-
-
-The following components provide applications access to Drill data sources:
-
-<table ><tbody><tr><th >Component</th><th >Role</th></tr><tr><td valign="top">Drillbit</td><td valign="top">Accepts queries from clients, executes queries against Drill data sources, and returns the query results. </td></tr><tr><td valign="top">ODBC Data Source Administrator</td><td valign="top">The ODBC Data Source Administrator enables the creation of DSNs to Apache Drill data sources.<br /> In the figure above, the ODBC Data Source Administrator was used to create <code>Hive-DrillDataSources</code>.</td></tr><tr><td valign="top">ODBC DSN</td><td valign="top"><p>Provides applications information about how to connect to the Drill Source.</p>In the figure above, the <code>Hive-DrillDataSources</code> is a DSN that provides connection information to the Hive tables.</td></tr><tr><td colspan="1" valign="top">BI Tool</td><td colspan="1" valign="top"><p>Accesses Drill data sources using the connection information from the ODBC DSN.</p>In the figure above, the BI tool uses <code>Hive-Dri
llDataSources</code> to access the <code>hive_student</code> table.</td></tr></tbody></table></div>
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[17/51] [partial] drill-site git commit: Cleaning up deleted content.
Posted by br...@apache.org.
http://git-wip-us.apache.org/repos/asf/drill-site/blob/d42f2cdd/docs/plugin-configuration-introduction/index.html
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-<!DOCTYPE html>
-<html>
-
-<head>
-
-<meta charset="UTF-8">
-<meta name=viewport content="width=device-width, initial-scale=1">
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-
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- <li class="toctree-l2"><a class="reference internal" href="/docs/performance/">Performance</a></li>
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- </ul>
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- <li class="toctree-l1"><a href="javascript: void(0);">Tutorials</a></li>
- <ul style="display: none">
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- <li class="toctree-l2"><a class="reference internal" href="/docs/tutorials-introduction/">Tutorials Introduction</a></li>
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- <li class="toctree-l2"><a class="reference internal" href="/docs/drill-in-10-minutes/">Drill in 10 Minutes</a></li>
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- <li class="toctree-l2"><a class="reference internal" href="/docs/analyzing-the-yelp-academic-dataset/">Analyzing the Yelp Academic Dataset</a></li>
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- <li class="toctree-l2"><a href="javascript: void(0);">Learn Drill with the MapR Sandbox</a></li>
- <ul style="display: none">
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- <li class="toctree-l3"><a class="reference internal" href="/docs/about-the-mapr-sandbox/">About the MapR Sandbox</a></li>
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- <li class="toctree-l3"><a class="reference internal" href="/docs/installing-the-apache-drill-sandbox/">Installing the Apache Drill Sandbox</a></li>
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- <li class="toctree-l3"><a class="reference internal" href="/docs/getting-to-know-the-drill-sandbox/">Getting to Know the Drill Sandbox</a></li>
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- <li class="toctree-l3"><a class="reference internal" href="/docs/lesson-1-learn-about-the-data-set/">Lesson 1: Learn about the Data Set</a></li>
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- <li class="toctree-l3"><a class="reference internal" href="/docs/lesson-2-run-queries-with-ansi-sql/">Lesson 2: Run Queries with ANSI SQL</a></li>
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- <li class="toctree-l3"><a class="reference internal" href="/docs/lesson-3-run-queries-on-complex-data-types/">Lesson 3: Run Queries on Complex Data Types</a></li>
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- <li class="toctree-l3"><a class="reference internal" href="/docs/summary/">Summary</a></li>
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- </ul>
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- <li class="toctree-l2"><a class="reference internal" href="/docs/analyzing-highly-dynamic-datasets/">Analyzing Highly Dynamic Datasets</a></li>
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- <li class="toctree-l2"><a class="reference internal" href="/docs/analyzing-social-media/">Analyzing Social Media</a></li>
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- </ul>
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- <li class="toctree-l1"><a href="javascript: void(0);">Install Drill</a></li>
- <ul style="display: none">
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- <li class="toctree-l2"><a class="reference internal" href="/docs/install-drill-introduction/">Install Drill Introduction</a></li>
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- <li class="toctree-l2"><a href="javascript: void(0);">Installing Drill in Embedded Mode</a></li>
- <ul style="display: none">
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- <li class="toctree-l3"><a class="reference internal" href="/docs/embedded-mode-prerequisites/">Embedded Mode Prerequisites</a></li>
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- <li class="toctree-l3"><a class="reference internal" href="/docs/installing-drill-on-linux-and-mac-os-x/">Installing Drill on Linux and Mac OS X</a></li>
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- <li class="toctree-l3"><a class="reference internal" href="/docs/starting-drill-on-linux-and-mac-os-x/">Starting Drill on Linux and Mac OS X</a></li>
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- <li class="toctree-l3"><a class="reference internal" href="/docs/installing-drill-on-windows/">Installing Drill on Windows</a></li>
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- <li class="toctree-l3"><a class="reference internal" href="/docs/starting-drill-on-windows/">Starting Drill on Windows</a></li>
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- </ul>
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- <li class="toctree-l2"><a href="javascript: void(0);">Installing Drill in Distributed Mode</a></li>
- <ul style="display: none">
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- <li class="toctree-l3"><a class="reference internal" href="/docs/distributed-mode-prerequisites/">Distributed Mode Prerequisites</a></li>
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- <li class="toctree-l3"><a class="reference internal" href="/docs/installing-drill-on-the-cluster/">Installing Drill on the Cluster</a></li>
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- <li class="toctree-l3"><a class="reference internal" href="/docs/starting-drill-in-distributed-mode/">Starting Drill in Distributed Mode</a></li>
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- </ul>
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- </ul>
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- <li class="toctree-l1"><a href="javascript: void(0);">Configure Drill</a></li>
- <ul style="display: none">
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- <li class="toctree-l2"><a class="reference internal" href="/docs/configure-drill-introduction/">Configure Drill Introduction</a></li>
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- <li class="toctree-l2"><a class="reference internal" href="/docs/configuring-drill-memory/">Configuring Drill Memory</a></li>
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- <li class="toctree-l2"><a href="javascript: void(0);">Configuring a Multitenant Cluster</a></li>
- <ul style="display: none">
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- <li class="toctree-l3"><a class="reference internal" href="/docs/configuring-a-multitenant-cluster-introduction/">Configuring a Multitenant Cluster Introduction</a></li>
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- <li class="toctree-l3"><a class="reference internal" href="/docs/configuring-multitenant-resources/">Configuring Multitenant Resources</a></li>
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- <li class="toctree-l3"><a class="reference internal" href="/docs/configuring-resources-for-a-shared-drillbit/">Configuring Resources for a Shared Drillbit</a></li>
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- </ul>
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- <li class="toctree-l2"><a class="reference internal" href="/docs/configuring-user-impersonation/">Configuring User Impersonation</a></li>
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- <li class="toctree-l2"><a class="reference internal" href="/docs/configuring-user-authentication/">Configuring User Authentication</a></li>
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- <li class="toctree-l2"><a href="javascript: void(0);">Configuration Options</a></li>
- <ul style="display: none">
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- <li class="toctree-l3"><a class="reference internal" href="/docs/configuration-options-introduction/">Configuration Options Introduction</a></li>
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- <li class="toctree-l3"><a class="reference internal" href="/docs/start-up-options/">Start-Up Options</a></li>
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- <li class="toctree-l3"><a class="reference internal" href="/docs/planning-and-execution-options/">Planning and Execution Options</a></li>
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- <li class="toctree-l3"><a class="reference internal" href="/docs/persistent-configuration-storage/">Persistent Configuration Storage</a></li>
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- </ul>
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- <li class="toctree-l2"><a class="reference internal" href="/docs/ports-used-by-drill/">Ports Used by Drill</a></li>
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- <li class="toctree-l2"><a class="reference internal" href="/docs/configuring-the-drill-shell/">Configuring the Drill Shell</a></li>
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- </ul>
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- <li class="toctree-l1 current_section "><a href="javascript: void(0);">Connect a Data Source</a></li>
- <ul class="current_section">
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- <li class="toctree-l2"><a class="reference internal" href="/docs/connect-a-data-source-introduction/">Connect a Data Source Introduction</a></li>
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- <li class="toctree-l2"><a class="reference internal" href="/docs/storage-plugin-registration/">Storage Plugin Registration</a></li>
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- <li class="toctree-l2"><a href="javascript: void(0);">Storage Plugin Configuration</a></li>
- <ul style="">
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- <li class="toctree-l3 current"><a class="reference internal" href="/docs/plugin-configuration-introduction/">Plugin Configuration Introduction</a></li>
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- <li class="toctree-l3"><a class="reference internal" href="/docs/file-system-storage-plugin/">File System Storage Plugin</a></li>
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- <li class="toctree-l3"><a class="reference internal" href="/docs/workspaces/">Workspaces</a></li>
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- <li class="toctree-l3"><a class="reference internal" href="/docs/hbase-storage-plugin/">HBase Storage Plugin</a></li>
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- <li class="toctree-l3"><a class="reference internal" href="/docs/hive-storage-plugin/">Hive Storage Plugin</a></li>
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- <li class="toctree-l3"><a class="reference internal" href="/docs/drill-default-input-format/">Drill Default Input Format</a></li>
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- </ul>
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- <li class="toctree-l2"><a class="reference internal" href="/docs/mongodb-plugin-for-apache-drill/">MongoDB Plugin for Apache Drill</a></li>
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- <li class="toctree-l2"><a class="reference internal" href="/docs/mapr-db-format/">MapR-DB Format</a></li>
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- </ul>
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- <li class="toctree-l1"><a href="javascript: void(0);">ODBC/JDBC Interfaces</a></li>
- <ul style="display: none">
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- <li class="toctree-l2"><a class="reference internal" href="/docs/interfaces-introduction/">Interfaces Introduction</a></li>
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- <li class="toctree-l2"><a class="reference internal" href="/docs/using-jdbc-with-squirrel-on-windows/">Using JDBC with SQuirreL on Windows</a></li>
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- <li class="toctree-l2"><a href="javascript: void(0);">Using ODBC on Linux and Mac OS X</a></li>
- <ul style="display: none">
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- <li class="toctree-l3"><a class="reference internal" href="/docs/odbc-on-linux-and-mac-introduction/">ODBC on Linux and Mac Introduction</a></li>
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- <li class="toctree-l3"><a class="reference internal" href="/docs/installing-the-driver-on-linux/">Installing the Driver on Linux</a></li>
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- <li class="toctree-l3"><a class="reference internal" href="/docs/installing-the-driver-on-mac-os-x/">Installing the Driver on Mac OS X</a></li>
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- <li class="toctree-l3"><a class="reference internal" href="/docs/configuring-connections-on-linux-and-mac-os-x/">Configuring Connections on Linux and Mac OS X</a></li>
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- <li class="toctree-l3"><a class="reference internal" href="/docs/driver-configuration-options/">Driver Configuration Options</a></li>
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- <li class="toctree-l3"><a class="reference internal" href="/docs/using-a-connection-string/">Using a Connection String</a></li>
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- <li class="toctree-l3"><a class="reference internal" href="/docs/advanced-properties/">Advanced Properties</a></li>
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- <li class="toctree-l3"><a class="reference internal" href="/docs/testing-the-odbc-connection/">Testing the ODBC Connection</a></li>
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- </ul>
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- <li class="toctree-l2"><a href="javascript: void(0);">Using ODBC on Windows</a></li>
- <ul style="display: none">
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- <li class="toctree-l3"><a class="reference internal" href="/docs/installing-the-driver-on-windows/">Installing the Driver on Windows</a></li>
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- <li class="toctree-l3"><a class="reference internal" href="/docs/configuring-connections-on-windows/">Configuring Connections on Windows</a></li>
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- <li class="toctree-l3"><a class="reference internal" href="/docs/connecting-to-odbc-data-sources/">Connecting to ODBC Data Sources</a></li>
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- <li class="toctree-l3"><a class="reference internal" href="/docs/tableau-examples/">Tableau Examples</a></li>
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- <li class="toctree-l3"><a class="reference internal" href="/docs/using-drill-explorer-on-windows/">Using Drill Explorer on Windows</a></li>
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- </ul>
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-
-
- <li class="toctree-l2"><a class="reference internal" href="/docs/using-microstrategy-analytics-with-apache-drill/">Using MicroStrategy Analytics with Apache Drill</a></li>
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- <li class="toctree-l2"><a class="reference internal" href="/docs/using-tibco-spotfire-with-drill/">Using Tibco Spotfire with Drill</a></li>
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- <li class="toctree-l2"><a class="reference internal" href="/docs/configuring-tibco-spotfire-server-with-drill/">Configuring Tibco Spotfire Server with Drill</a></li>
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-
- <li class="toctree-l2"><a class="reference internal" href="/docs/using-apache-drill-with-tableau-9-desktop/">Using Apache Drill with Tableau 9 Desktop</a></li>
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-
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- <li class="toctree-l2"><a class="reference internal" href="/docs/using-apache-drill-with-tableau-9-server/">Using Apache Drill with Tableau 9 Server</a></li>
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- </ul>
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- <li class="toctree-l1"><a href="javascript: void(0);">Query Data</a></li>
- <ul style="display: none">
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- <li class="toctree-l2"><a class="reference internal" href="/docs/query-data-introduction/">Query Data Introduction</a></li>
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- <li class="toctree-l2"><a href="javascript: void(0);">Querying a File System</a></li>
- <ul style="display: none">
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- <li class="toctree-l3"><a class="reference internal" href="/docs/querying-a-file-system-introduction/">Querying a File System Introduction</a></li>
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- <li class="toctree-l3"><a class="reference internal" href="/docs/querying-json-files/">Querying JSON Files</a></li>
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- <li class="toctree-l3"><a class="reference internal" href="/docs/querying-parquet-files/">Querying Parquet Files</a></li>
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- <li class="toctree-l3"><a class="reference internal" href="/docs/querying-plain-text-files/">Querying Plain Text Files</a></li>
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- <li class="toctree-l3"><a class="reference internal" href="/docs/querying-directories/">Querying Directories</a></li>
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- </ul>
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- <li class="toctree-l2"><a class="reference internal" href="/docs/querying-hbase/">Querying HBase</a></li>
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- <li class="toctree-l2"><a href="javascript: void(0);">Querying Complex Data</a></li>
- <ul style="display: none">
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- <li class="toctree-l3"><a class="reference internal" href="/docs/querying-complex-data-introduction/">Querying Complex Data Introduction</a></li>
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- <li class="toctree-l3"><a class="reference internal" href="/docs/sample-data-donuts/">Sample Data: Donuts</a></li>
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- <li class="toctree-l3"><a class="reference internal" href="/docs/selecting-flat-data/">Selecting Flat Data</a></li>
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- <li class="toctree-l3"><a class="reference internal" href="/docs/using-sql-functions-clauses-and-joins/">Using SQL Functions, Clauses, and Joins</a></li>
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- <li class="toctree-l3"><a class="reference internal" href="/docs/selecting-nested-data-for-a-column/">Selecting Nested Data for a Column</a></li>
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- <li class="toctree-l3"><a class="reference internal" href="/docs/selecting-multiple-columns-within-nested-data/">Selecting Multiple Columns Within Nested Data</a></li>
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- </ul>
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- <li class="toctree-l2"><a class="reference internal" href="/docs/querying-hive/">Querying Hive</a></li>
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- <li class="toctree-l2"><a class="reference internal" href="/docs/querying-the-information-schema/">Querying the INFORMATION SCHEMA</a></li>
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- <li class="toctree-l2"><a class="reference internal" href="/docs/querying-system-tables/">Querying System Tables</a></li>
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- <li class="toctree-l2"><a class="reference internal" href="/docs/monitoring-and-canceling-queries-in-the-drill-web-ui/">Monitoring and Canceling Queries in the Drill Web UI</a></li>
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- </ul>
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- <li class="toctree-l1"><a href="javascript: void(0);">Performance Tuning</a></li>
- <ul style="display: none">
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- <li class="toctree-l2"><a class="reference internal" href="/docs/performance-tuning-introduction/">Performance Tuning Introduction</a></li>
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- <li class="toctree-l2"><a class="reference internal" href="/docs/partition-pruning/">Partition Pruning</a></li>
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- <li class="toctree-l2"><a class="reference internal" href="/docs/choosing-a-storage-format/">Choosing a Storage Format</a></li>
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- <li class="toctree-l2"><a href="javascript: void(0);">Query Plans and Tuning</a></li>
- <ul style="display: none">
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- <li class="toctree-l3"><a class="reference internal" href="/docs/query-plans-and-tuning-introduction/">Query Plans and Tuning Introduction</a></li>
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- <li class="toctree-l3"><a class="reference internal" href="/docs/join-planning-guidelines/">Join Planning Guidelines</a></li>
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- <li class="toctree-l3"><a class="reference internal" href="/docs/guidelines-for-optimizing-aggregation/">Guidelines for Optimizing Aggregation</a></li>
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- <li class="toctree-l3"><a class="reference internal" href="/docs/modifying-query-planning-options/">Modifying Query Planning Options</a></li>
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- <li class="toctree-l3"><a class="reference internal" href="/docs/sort-based-and-hash-based-memory-constrained-operators/">Sort-Based and Hash-Based Memory-Constrained Operators</a></li>
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- <li class="toctree-l3"><a class="reference internal" href="/docs/enabling-query-queuing/">Enabling Query Queuing</a></li>
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- <li class="toctree-l3"><a class="reference internal" href="/docs/controlling-parallelization-to-balance-performance-with-multi-tenancy/">Controlling Parallelization to Balance Performance with Multi-Tenancy</a></li>
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- </ul>
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- <li class="toctree-l2"><a href="javascript: void(0);">Identifying Performance Issues</a></li>
- <ul style="display: none">
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- <li class="toctree-l3"><a class="reference internal" href="/docs/query-plans/">Query Plans</a></li>
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- <li class="toctree-l3"><a class="reference internal" href="/docs/query-profiles/">Query Profiles</a></li>
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- <li class="toctree-l2"><a href="javascript: void(0);">Performance Tuning Reference</a></li>
- <ul style="display: none">
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- <li class="toctree-l3"><a class="reference internal" href="/docs/query-profile-column-descriptions/">Query Profile Column Descriptions</a></li>
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- <li class="toctree-l3"><a class="reference internal" href="/docs/physical-operators/">Physical Operators</a></li>
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- </ul>
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- </ul>
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- <li class="toctree-l1"><a href="javascript: void(0);">Log and Debug</a></li>
- <ul style="display: none">
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- <li class="toctree-l2"><a class="reference internal" href="/docs/log-and-debug-introduction/">Log and Debug Introduction</a></li>
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- <li class="toctree-l2"><a class="reference internal" href="/docs/error-messages/">Error Messages</a></li>
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- <li class="toctree-l2"><a class="reference internal" href="/docs/modify-logback-xml/">Modify logback.xml</a></li>
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- <li class="toctree-l2"><a class="reference internal" href="/docs/review-the-java-stack-trace/">Review the Java Stack Trace</a></li>
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- </ul>
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- <li class="toctree-l1"><a href="javascript: void(0);">Query Audit Logging</a></li>
- <ul style="display: none">
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- <li class="toctree-l2"><a class="reference internal" href="/docs/getting-query-information/">Getting Query Information</a></li>
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- </ul>
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- <li class="toctree-l1"><a href="javascript: void(0);">SQL Reference</a></li>
- <ul style="display: none">
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- <li class="toctree-l2"><a class="reference internal" href="/docs/sql-reference-introduction/">SQL Reference Introduction</a></li>
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- <li class="toctree-l2"><a href="javascript: void(0);">Data Types</a></li>
- <ul style="display: none">
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- <li class="toctree-l3"><a class="reference internal" href="/docs/supported-data-types/">Supported Data Types</a></li>
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- <li class="toctree-l3"><a class="reference internal" href="/docs/date-time-and-timestamp/">Date, Time, and Timestamp</a></li>
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- <li class="toctree-l3"><a class="reference internal" href="/docs/handling-different-data-types/">Handling Different Data Types</a></li>
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- </ul>
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- <li class="toctree-l2"><a class="reference internal" href="/docs/lexical-structure/">Lexical Structure</a></li>
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- <li class="toctree-l2"><a class="reference internal" href="/docs/operators/">Operators</a></li>
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- <li class="toctree-l2"><a href="javascript: void(0);">SQL Functions</a></li>
- <ul style="display: none">
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- <li class="toctree-l3"><a class="reference internal" href="/docs/about-sql-function-examples/">About SQL Function Examples</a></li>
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- <li class="toctree-l3"><a class="reference internal" href="/docs/math-and-trig/">Math and Trig</a></li>
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- <li class="toctree-l3"><a class="reference internal" href="/docs/data-type-conversion/">Data Type Conversion</a></li>
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- <li class="toctree-l3"><a class="reference internal" href="/docs/date-time-functions-and-arithmetic/">Date/Time Functions and Arithmetic</a></li>
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- <li class="toctree-l3"><a class="reference internal" href="/docs/string-manipulation/">String Manipulation</a></li>
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- <li class="toctree-l3"><a class="reference internal" href="/docs/aggregate-and-aggregate-statistical/">Aggregate and Aggregate Statistical</a></li>
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- <li class="toctree-l3"><a class="reference internal" href="/docs/functions-for-handling-nulls/">Functions for Handling Nulls</a></li>
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- <li class="toctree-l2"><a href="javascript: void(0);">Nested Data Functions</a></li>
- <ul style="display: none">
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- <li class="toctree-l3"><a class="reference internal" href="/docs/nested-data-limitations/">Nested Data Limitations</a></li>
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- <li class="toctree-l3"><a class="reference internal" href="/docs/flatten/">FLATTEN</a></li>
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- <li class="toctree-l3"><a class="reference internal" href="/docs/kvgen/">KVGEN</a></li>
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- <li class="toctree-l3"><a class="reference internal" href="/docs/repeated-count/">REPEATED_COUNT</a></li>
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- <li class="toctree-l3"><a class="reference internal" href="/docs/repeated-contains/">REPEATED_CONTAINS</a></li>
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- </ul>
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- <li class="toctree-l2"><a class="reference internal" href="/docs/query-directory-functions/">Query Directory Functions</a></li>
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- <li class="toctree-l2"><a href="javascript: void(0);">SQL Commands</a></li>
- <ul style="display: none">
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- <li class="toctree-l3"><a class="reference internal" href="/docs/supported-sql-commands/">Supported SQL Commands</a></li>
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- <li class="toctree-l3"><a class="reference internal" href="/docs/alter-session/">ALTER SESSION</a></li>
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- <li class="toctree-l3"><a class="reference internal" href="/docs/alter-system/">ALTER SYSTEM</a></li>
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- <li class="toctree-l3"><a class="reference internal" href="/docs/create-table-as-ctas/">CREATE TABLE AS (CTAS)</a></li>
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- <li class="toctree-l3"><a class="reference internal" href="/docs/create-view/">CREATE VIEW</a></li>
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- <li class="toctree-l3"><a class="reference internal" href="/docs/drop-view/">DROP VIEW</a></li>
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- <li class="toctree-l3"><a class="reference internal" href="/docs/describe/">DESCRIBE</a></li>
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- <li class="toctree-l3"><a class="reference internal" href="/docs/explain/">EXPLAIN</a></li>
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- <li class="toctree-l3"><a class="reference internal" href="/docs/select/">SELECT</a></li>
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- <li class="toctree-l3"><a class="reference internal" href="/docs/select-from/">SELECT FROM</a></li>
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- <li class="toctree-l3"><a class="reference internal" href="/docs/select-group-by/">SELECT GROUP BY</a></li>
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- <li class="toctree-l3"><a class="reference internal" href="/docs/select-having/">SELECT HAVING</a></li>
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- <li class="toctree-l3"><a class="reference internal" href="/docs/select-limit/">SELECT LIMIT</a></li>
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- <li class="toctree-l3"><a class="reference internal" href="/docs/select-offset/">SELECT OFFSET</a></li>
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- <li class="toctree-l3"><a class="reference internal" href="/docs/select-order-by/">SELECT ORDER BY</a></li>
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-
- <p>When you add or update storage plugin instances on one Drill node in a Drill
-cluster, Drill broadcasts the information to all of the other Drill nodes
-to have identical storage plugin configurations. You do not need to
-restart any of the Drillbits when you add or update a storage plugin instance.</p>
-
-<p>Use the Drill Web UI to update or add a new storage plugin. Launch a web browser, go to: <code>http://<IP address or host name>:8047</code>, and then go to the Storage tab. </p>
-
-<p>To create and configure a new storage plugin:</p>
-
-<ol>
-<li>Enter a storage name in New Storage Plugin.
-Each storage plugin registered with Drill must have a distinct
-name. Names are case-sensitive.</li>
-<li>Click Create.<br></li>
-<li>In Configuration, configure attributes of the storage plugin, if applicable, using JSON formatting. The Storage Plugin Attributes table in the next section describes attributes typically reconfigured by users. </li>
-<li>Click Create.</li>
-</ol>
-
-<p>Click Update to reconfigure an existing, enabled storage plugin.</p>
-
-<h2 id="storage-plugin-attributes">Storage Plugin Attributes</h2>
-
-<p>The following graphic shows key attributes of a typical dfs storage plugin:<br>
-<img src="/docs/img/connect-plugin.png" alt="dfs plugin"></p>
-
-<h2 id="list-of-attributes-and-definitions">List of Attributes and Definitions</h2>
-
-<p>The following table describes the attributes you configure for storage plugins.
-<table>
- <tr>
- <th>Attribute</th>
- <th>Example Values</th>
- <th>Required</th>
- <th>Description</th>
- </tr>
- <tr>
- <td>"type"</td>
- <td>"file"<br>"hbase"<br>"hive"<br>"mongo"</td>
- <td>yes</td>
- <td>A valid storage plugin type name.</td>
- </tr>
- <tr>
- <td>"enabled"</td>
- <td>true<br>false</td>
- <td>yes</td>
- <td>State of the storage plugin.</td>
- </tr>
- <tr>
- <td>"connection"</td>
- <td>"classpath:///"<br>"file:///"<br>"mongodb://localhost:27017/"<br>"maprfs:///"</td>
- <td>implementation-dependent</td>
- <td>Type of distributed file system, such as HDFS, Amazon S3, or files in your file system.</td>
- </tr>
- <tr>
- <td>"workspaces"</td>
- <td>null<br>"logs"</td>
- <td>no</td>
- <td>One or more unique workspace names. If a workspace name is used more than once, only the last definition is effective. </td>
- </tr>
- <tr>
- <td>"workspaces". . . "location"</td>
- <td>"location": "/Users/johndoe/mydata"<br>"location": "/tmp"</td>
- <td>no</td>
- <td>Full path to a directory on the file system.</td>
- </tr>
- <tr>
- <td>"workspaces". . . "writable"</td>
- <td>true<br>false</td>
- <td>no</td>
- <td>One or more unique workspace names. If defined more than once, the last workspace name overrides the others.</td>
- </tr>
- <tr>
- <td>"workspaces". . . "defaultInputFormat"</td>
- <td>null<br>"parquet"<br>"csv"<br>"json"</td>
- <td>no</td>
- <td>Format for reading data, regardless of extension. Default = Parquet.</td>
- </tr>
- <tr>
- <td>"formats"</td>
- <td>"psv"<br>"csv"<br>"tsv"<br>"parquet"<br>"json"<br>"avro"<br>"maprdb" *</td>
- <td>yes</td>
- <td>One or more valid file formats for reading. Drill implicitly detects formats of some files based on extension or bits of data in the file, others require configuration.</td>
- </tr>
- <tr>
- <td>"formats" . . . "type"</td>
- <td>"text"<br>"parquet"<br>"json"<br>"maprdb" *</td>
- <td>yes</td>
- <td>Format type. You can define two formats, csv and psv, as type "Text", but having different delimiters. </td>
- </tr>
- <tr>
- <td>formats . . . "extensions"</td>
- <td>["csv"]</td>
- <td>format-dependent</td>
- <td>Extensions of the files that Drill can read.</td>
- </tr>
- <tr>
- <td>"formats" . . . "delimiter"</td>
- <td>"\t"<br>","</td>
- <td>format-dependent</td>
- <td>One or more characters that separate records in a delimited text file, such as CSV. Use a 4-digit hex ascii code syntax \uXXXX for a non-printable delimiter. </td>
- </tr>
- <tr>
- <td>"formats" . . . "fieldDelimiter"</td>
- <td>","</td>
- <td>no</td>
- <td>A single character that separates each value in a column of a delimited text file.</td>
- </tr>
- <tr>
- <td>"formats" . . . "quote"</td>
- <td>"""</td>
- <td>no</td>
- <td>A single character that starts/ends a value in a delimited text file.</td>
- </tr>
- <tr>
- <td>"formats" . . . "escape"</td>
- <td>"`"</td>
- <td>no</td>
- <td>A single character that escapes the quote character.</td>
- </tr>
- <tr>
- <td>"formats" . . . "comment"</td>
- <td>"#"</td>
- <td>no</td>
- <td>The line decoration that starts a comment line in the delimited text file.</td>
- </tr>
- <tr>
- <td>"formats" . . . "skipFirstLine"</td>
- <td>true</td>
- <td>no</td>
- <td>To include or omits the header when reading a delimited text file.
- </td>
- </tr>
-</table></p>
-
-<p>* Pertains only to distributed drill installations using the mapr-drill package. </p>
-
-<h2 id="using-the-formats">Using the Formats</h2>
-
-<p>You can use the following attributes when the <code>sys.options</code> property setting <code>exec.storage.enable_new_text_reader</code> is true (the default):</p>
-
-<ul>
-<li>comment<br></li>
-<li>escape<br></li>
-<li>fieldDeliimiter<br></li>
-<li>quote<br></li>
-<li>skipFirstLine</li>
-</ul>
-
-<p>The "formats" apply to all workspaces defined in a storage plugin. A typical use case defines separate storage plugins for different root directories to query the files stored below the directory. An alternative use case defines multiple formats within the same storage plugin and names target files using different extensions to match the formats.</p>
-
-<p>The following example of a storage plugin for reading CSV files with the new text reader includes two formats for reading files having either a <code>csv</code> or <code>csv2</code> extension. The text reader does include the first line of column names in the queries of <code>.csv</code> files but does not include it in queries of <code>.csv2</code> files. </p>
-<div class="highlight"><pre><code class="language-text" data-lang="text">"csv": {
- "type": "text",
- "extensions": [
- "csv"
- ],
- "delimiter": ","
-},
-"csv_with_header": {
- "type": "text",
- "extensions": [
- "csv2"
- ],
- "comment": "&",
- "skipFirstLine": true,
- "delimiter": ","
-},
-</code></pre></div>
-<h2 id="using-other-attributes">Using Other Attributes</h2>
-
-<p>The configuration of other attributes, such as <code>size.calculator.enabled</code> in the hbase plugin and <code>configProps</code> in the hive plugin, are implementation-dependent and beyond the scope of this document.</p>
-
-<h2 id="case-sensitive-names">Case-sensitive Names</h2>
-
-<p>As previously mentioned, workspace and storage plugin names are case-sensitive. For example, the following query uses a storage plugin name <code>dfs</code> and a workspace name <code>clicks</code>. When you refer to <code>dfs.clicks</code> in an SQL statement, use the defined case:</p>
-<div class="highlight"><pre><code class="language-text" data-lang="text">0: jdbc:drill:> USE dfs.clicks;
-</code></pre></div>
-<p>For example, using uppercase letters in the query after defining the storage plugin and workspace names using lowercase letters does not work. </p>
-
-<h2 id="storage-plugin-rest-api">Storage Plugin REST API</h2>
-
-<p>Drill provides a REST API that you can use to create a storage plugin. Use an HTTP POST and pass two properties:</p>
-
-<ul>
-<li><p>name<br>
-The plugin name. </p></li>
-<li><p>config<br>
-The storage plugin definition as you would enter it in the Web UI.</p></li>
-</ul>
-
-<p>For example, this command creates a plugin named myplugin for reading files of an unknown type located on the root of the file system:</p>
-<div class="highlight"><pre><code class="language-text" data-lang="text">curl -X POST -/json" -d '{"name":"myplugin", "config": {"type": "file", "enabled": false, "connection": "file:///", "workspaces": { "root": { "location": "/", "writable": false, "defaultInputFormat": null}}, "formats": null}}' http://localhost:8047/storage/myplugin.json
-</code></pre></div>
-<h2 id="bootstrapping-a-storage-plugin">Bootstrapping a Storage Plugin</h2>
-
-<p>If you need to add a storage plugin to Drill and do not want to use a web browser, you can create a <a href="https://github.com/apache/drill/blob/master/contrib/storage-hbase/src/main/resources/bootstrap-storage-plugins.json">bootstrap-storage-plugins.json</a> file and include it on the classpath when starting Drill. The storage plugin loads when Drill starts up.</p>
-
-<p>Bootstrapping a storage plugin works only when the first drillbit in the cluster first starts up. After cluster startup, you have to use the REST API or Drill Web UI to add a storage plugin. </p>
-
-<p>If you configure an HBase storage plugin using bootstrap-storage-plugins.json file and HBase is not installed, you might experience a delay when executing the queries. Configure the <a href="http://hbase.apache.org/book.html#config.files">HBase client timeout</a> and retry settings in the config block of HBase plugin instance configuration.</p>
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- <p>Drill 1.2 includes a JDBC storage plugin for connecting to data sources such as MySQL over JDBC. </p>
-
-<h2 id="example-mysql-setup">Example MySQL Setup</h2>
-
-<p>To configure the JDBC storage plugin for MySQL, set up MySQL and the compatible MySQL driver:</p>
-
-<ol>
-<li>Download and install a current version MySQL.<br></li>
-<li>Set up a MySQL password for the user account you plan to use.</li>
-<li>Download and unpack the compatible JDBC driver.<br></li>
-<li>Put a copy of the driver JAR in the following location:<br>
-<code><drill_installation_directory>/jars/3rdparty</code><br></li>
-</ol>
-
-<h2 id="jdbc-storage-plugin-configuration">JDBC Storage Plugin Configuration</h2>
-
-<p>Drill communicates with MySQL through the JDBC driver using the configuration that you specify in the Web Console or through the <a href="/docs/plugin-configuration-basics/#storage-plugin-rest-api">REST API</a>. </p>
-
-<div class="admonition note">
- <p class="first admonition-title">Note</p>
- <p class="last">Verify that MySQL is running and the MySQL driver is in place before you configure the JDBC storage plugin. </p>
-</div>
-
-<p>To configure the JDBC storage plugin:</p>
-
-<ol>
-<li><p>To save your storage plugin configurations from one session to the next, set the following option in the <code>drill-override.conf</code> file if you are running Drill in embedded mode.</p>
-
-<p><code>drill.exec.sys.store.provider.local.path = "/mypath"</code></p></li>
-<li><p><a href="/docs/starting-drill-on-linux-and-mac-os-x/">Start the Drill shell</a>. </p></li>
-<li><p><a href="/docs/starting-the-web-console/">Start the Web Console</a>. </p></li>
-<li><p>On the Storage tab, enter a name in <strong>New Storage Plugin</strong>. For example, enter myplugin.
-Each configuration registered with Drill must have a distinct
-name. Names are case-sensitive. </p>
-
-<div class="admonition note">
-<p class="first admonition-title">Note</p>
-<p class="last">The URL differs depending on your installation and configuration. </p>
-</div> </li>
-<li><p>Click <strong>Create</strong>. </p></li>
-<li><p>In Configuration, set the required properties using JSON formatting as shown in the following example. Change the properties to match your environment. </p>
-<div class="highlight"><pre><code class="language-text" data-lang="text">{
- "type": "jdbc",
- "driver": "com.mysql.jdbc.Driver",
- "url": "jdbc:mysql://localhost:3306",
- "username": "root",
- "password": "mypassword",
- "enabled": true
-}
-</code></pre></div></li>
-<li><p>Click <strong>Create</strong>. </p></li>
-</ol>
-
-<p>You can use the performance_schema database, which is installed with MySQL to query your MySQL performance_schema database. Include the names of the storage plugin configuration, the database, and table in dot notation the FROM clause as follows:</p>
-<div class="highlight"><pre><code class="language-text" data-lang="text"> 0: jdbc:drill:zk=local> select * from myplugin.performance_schema.accounts;
- +--------+------------+----------------------+--------------------+
- | USER | HOST | CURRENT_CONNECTIONS | TOTAL_CONNECTIONS |
- +--------+------------+----------------------+--------------------+
- | null | null | 18 | 20 |
- | jdoe | localhost | 0 | 813 |
- | root | localhost | 3 | 5 |
- +--------+------------+----------------------+--------------------+
- 3 rows selected (0.171 seconds)
-</code></pre></div>
-<p>For information about related, unresolved issues in Drill 1.2, see the <a href="/docs/apache-drill-1-2-0-release-notes/#important-unresolved-issues">release notes</a>.</p>
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-<p>Drill is purpose-built from the ground up for complex/multi-structured data
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-
-
- <li class="toctree-l2"><a href="javascript: void(0);">Configuring a Multitenant Cluster</a></li>
- <ul style="display: none">
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- <li class="toctree-l3"><a class="reference internal" href="/docs/configuring-a-multitenant-cluster-introduction/">Configuring a Multitenant Cluster Introduction</a></li>
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- <li class="toctree-l3"><a class="reference internal" href="/docs/configuring-multitenant-resources/">Configuring Multitenant Resources</a></li>
-
- <li class="toctree-l3"><a class="reference internal" href="/docs/configuring-resources-for-a-shared-drillbit/">Configuring Resources for a Shared Drillbit</a></li>
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- </ul>
-
-
-
- <li class="toctree-l2"><a class="reference internal" href="/docs/configuring-user-impersonation/">Configuring User Impersonation</a></li>
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- <li class="toctree-l2"><a class="reference internal" href="/docs/configuring-user-authentication/">Configuring User Authentication</a></li>
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- <li class="toctree-l2"><a class="reference internal" href="/docs/configuring-user-impersonation-with-hive-authorization/">Configuring User Impersonation with Hive Authorization</a></li>
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- <li class="toctree-l2"><a href="javascript: void(0);">Configuration Options</a></li>
- <ul style="display: none">
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- <li class="toctree-l3"><a class="reference internal" href="/docs/configuration-options-introduction/">Configuration Options Introduction</a></li>
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- <li class="toctree-l3"><a class="reference internal" href="/docs/start-up-options/">Start-Up Options</a></li>
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- <li class="toctree-l3"><a class="reference internal" href="/docs/planning-and-execution-options/">Planning and Execution Options</a></li>
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- <li class="toctree-l3"><a class="reference internal" href="/docs/persistent-configuration-storage/">Persistent Configuration Storage</a></li>
-
- </ul>
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- <li class="toctree-l2"><a class="reference internal" href="/docs/ports-used-by-drill/">Ports Used by Drill</a></li>
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-
-
- <li class="toctree-l2"><a class="reference internal" href="/docs/configuring-the-drill-shell/">Configuring the Drill Shell</a></li>
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-
- </ul>
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-
-
- <li class="toctree-l1"><a href="javascript: void(0);">Connect a Data Source</a></li>
- <ul style="display: none">
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- <li class="toctree-l2"><a class="reference internal" href="/docs/connect-a-data-source-introduction/">Connect a Data Source Introduction</a></li>
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- <li class="toctree-l2"><a class="reference internal" href="/docs/storage-plugin-registration/">Storage Plugin Registration</a></li>
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- <li class="toctree-l2"><a href="javascript: void(0);">Storage Plugin Configuration</a></li>
- <ul style="display: none">
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- <li class="toctree-l3"><a class="reference internal" href="/docs/plugin-configuration-basics/">Plugin Configuration Basics</a></li>
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- <li class="toctree-l3"><a class="reference internal" href="/docs/file-system-storage-plugin/">File System Storage Plugin</a></li>
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- <li class="toctree-l3"><a class="reference internal" href="/docs/workspaces/">Workspaces</a></li>
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- <li class="toctree-l3"><a class="reference internal" href="/docs/hbase-storage-plugin/">HBase Storage Plugin</a></li>
-
- <li class="toctree-l3"><a class="reference internal" href="/docs/hive-storage-plugin/">Hive Storage Plugin</a></li>
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- <li class="toctree-l3"><a class="reference internal" href="/docs/drill-default-input-format/">Drill Default Input Format</a></li>
-
- </ul>
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-
-
- <li class="toctree-l2"><a class="reference internal" href="/docs/mongodb-plugin-for-apache-drill/">MongoDB Plugin for Apache Drill</a></li>
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-
-
- <li class="toctree-l2"><a class="reference internal" href="/docs/mapr-db-format/">MapR-DB Format</a></li>
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-
- </ul>
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- <li class="toctree-l1"><a href="javascript: void(0);">ODBC/JDBC Interfaces</a></li>
- <ul style="display: none">
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- <li class="toctree-l2"><a class="reference internal" href="/docs/interfaces-introduction/">Interfaces Introduction</a></li>
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- <li class="toctree-l2"><a class="reference internal" href="/docs/using-the-jdbc-driver/">Using the JDBC Driver</a></li>
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-
-
- <li class="toctree-l2"><a class="reference internal" href="/docs/using-jdbc-with-squirrel-on-windows/">Using JDBC with SQuirreL on Windows</a></li>
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- <li class="toctree-l2"><a href="javascript: void(0);">Installing the ODBC Driver</a></li>
- <ul style="display: none">
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- <li class="toctree-l3"><a class="reference internal" href="/docs/installing-the-driver-on-linux/">Installing the Driver on Linux</a></li>
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- <li class="toctree-l3"><a class="reference internal" href="/docs/installing-the-driver-on-mac-os-x/">Installing the Driver on Mac OS X</a></li>
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- <li class="toctree-l3"><a class="reference internal" href="/docs/installing-the-driver-on-windows/">Installing the Driver on Windows</a></li>
-
- <li class="toctree-l3"><a class="reference internal" href="/docs/installing-the-tdc-file-on-windows/">Installing the TDC File on Windows</a></li>
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- </ul>
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-
-
- <li class="toctree-l2"><a href="javascript: void(0);">Configuring ODBC</a></li>
- <ul style="display: none">
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- <li class="toctree-l3"><a class="reference internal" href="/docs/odbc-configuration-reference/">ODBC Configuration Reference</a></li>
-
- <li class="toctree-l3"><a class="reference internal" href="/docs/configuring-odbc-on-linux/">Configuring ODBC on Linux</a></li>
-
- <li class="toctree-l3"><a class="reference internal" href="/docs/configuring-odbc-on-mac-os-x/">Configuring ODBC on Mac OS X</a></li>
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- <li class="toctree-l3"><a class="reference internal" href="/docs/configuring-odbc-on-windows/">Configuring ODBC on Windows</a></li>
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- <li class="toctree-l3"><a class="reference internal" href="/docs/testing-the-odbc-connection/">Testing the ODBC Connection</a></li>
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- </ul>
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-
- <li class="toctree-l2"><a href="javascript: void(0);">Using Drill Explorer</a></li>
- <ul style="display: none">
-
- <li class="toctree-l3"><a class="reference internal" href="/docs/drill-explorer-introduction/">Drill Explorer Introduction</a></li>
-
- <li class="toctree-l3"><a class="reference internal" href="/docs/connecting-drill-explorer-to-data/">Connecting Drill Explorer to Data</a></li>
-
- <li class="toctree-l3"><a class="reference internal" href="/docs/browsing-data-and-defining-views/">Browsing Data and Defining Views</a></li>
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- </ul>
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-
-
- <li class="toctree-l2"><a href="javascript: void(0);">Using Drill with BI Tools</a></li>
- <ul style="display: none">
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- <li class="toctree-l3"><a class="reference internal" href="/docs/using-drill-with-bi-tools-introduction/">Using Drill with BI Tools Introduction</a></li>
-
- <li class="toctree-l3"><a class="reference internal" href="/docs/tableau-examples/">Tableau Examples</a></li>
-
- <li class="toctree-l3"><a class="reference internal" href="/docs/using-microstrategy-analytics-with-apache-drill/">Using MicroStrategy Analytics with Apache Drill</a></li>
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- <li class="toctree-l3"><a class="reference internal" href="/docs/using-tibco-spotfire-desktop-with-drill/">Using Tibco Spotfire Desktop with Drill</a></li>
-
- <li class="toctree-l3"><a class="reference internal" href="/docs/configuring-tibco-spotfire-server-with-drill/">Configuring Tibco Spotfire Server with Drill</a></li>
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- <li class="toctree-l3"><a class="reference internal" href="/docs/using-apache-drill-with-tableau-9-desktop/">Using Apache Drill with Tableau 9 Desktop</a></li>
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- <li class="toctree-l3"><a class="reference internal" href="/docs/using-apache-drill-with-tableau-9-server/">Using Apache Drill with Tableau 9 Server</a></li>
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- <li class="toctree-l3"><a class="reference internal" href="/docs/configuring-jreport-with-drill/">Configuring JReport with Drill</a></li>
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- </ul>
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-
- </ul>
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- <li class="toctree-l1"><a href="javascript: void(0);">Query Data</a></li>
- <ul style="display: none">
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-
- <li class="toctree-l2"><a class="reference internal" href="/docs/query-data-introduction/">Query Data Introduction</a></li>
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-
-
- <li class="toctree-l2"><a href="javascript: void(0);">Querying a File System</a></li>
- <ul style="display: none">
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- <li class="toctree-l3"><a class="reference internal" href="/docs/querying-a-file-system-introduction/">Querying a File System Introduction</a></li>
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- <li class="toctree-l3"><a class="reference internal" href="/docs/querying-json-files/">Querying JSON Files</a></li>
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- <li class="toctree-l3"><a class="reference internal" href="/docs/querying-parquet-files/">Querying Parquet Files</a></li>
-
- <li class="toctree-l3"><a class="reference internal" href="/docs/querying-plain-text-files/">Querying Plain Text Files</a></li>
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- <li class="toctree-l3"><a class="reference internal" href="/docs/querying-directories/">Querying Directories</a></li>
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- </ul>
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- <li class="toctree-l2"><a class="reference internal" href="/docs/querying-hbase/">Querying HBase</a></li>
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- <li class="toctree-l2"><a href="javascript: void(0);">Querying Complex Data</a></li>
- <ul style="display: none">
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- <li class="toctree-l3"><a class="reference internal" href="/docs/querying-complex-data-introduction/">Querying Complex Data Introduction</a></li>
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- <li class="toctree-l3"><a class="reference internal" href="/docs/sample-data-donuts/">Sample Data: Donuts</a></li>
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- <li class="toctree-l3"><a class="reference internal" href="/docs/selecting-flat-data/">Selecting Flat Data</a></li>
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- <li class="toctree-l3"><a class="reference internal" href="/docs/using-sql-functions-clauses-and-joins/">Using SQL Functions, Clauses, and Joins</a></li>
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- <li class="toctree-l3"><a class="reference internal" href="/docs/selecting-nested-data-for-a-column/">Selecting Nested Data for a Column</a></li>
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- <li class="toctree-l3"><a class="reference internal" href="/docs/selecting-multiple-columns-within-nested-data/">Selecting Multiple Columns Within Nested Data</a></li>
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- </ul>
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-
-
- <li class="toctree-l2"><a class="reference internal" href="/docs/querying-hive/">Querying Hive</a></li>
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- <li class="toctree-l2"><a class="reference internal" href="/docs/querying-the-information-schema/">Querying the INFORMATION SCHEMA</a></li>
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- <li class="toctree-l2"><a class="reference internal" href="/docs/querying-system-tables/">Querying System Tables</a></li>
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-
-
- <li class="toctree-l2"><a class="reference internal" href="/docs/monitoring-and-canceling-queries-in-the-drill-web-ui/">Monitoring and Canceling Queries in the Drill Web UI</a></li>
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-
- </ul>
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-
-
- <li class="toctree-l1"><a href="javascript: void(0);">Performance Tuning</a></li>
- <ul style="display: none">
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-
- <li class="toctree-l2"><a class="reference internal" href="/docs/performance-tuning-introduction/">Performance Tuning Introduction</a></li>
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-
-
- <li class="toctree-l2"><a class="reference internal" href="/docs/partition-pruning/">Partition Pruning</a></li>
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-
-
- <li class="toctree-l2"><a class="reference internal" href="/docs/choosing-a-storage-format/">Choosing a Storage Format</a></li>
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-
- <li class="toctree-l2"><a href="javascript: void(0);">Query Plans and Tuning</a></li>
- <ul style="display: none">
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- <li class="toctree-l3"><a class="reference internal" href="/docs/query-plans-and-tuning-introduction/">Query Plans and Tuning Introduction</a></li>
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- <li class="toctree-l3"><a class="reference internal" href="/docs/join-planning-guidelines/">Join Planning Guidelines</a></li>
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- <li class="toctree-l3"><a class="reference internal" href="/docs/guidelines-for-optimizing-aggregation/">Guidelines for Optimizing Aggregation</a></li>
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- <li class="toctree-l3"><a class="reference internal" href="/docs/modifying-query-planning-options/">Modifying Query Planning Options</a></li>
-
- <li class="toctree-l3"><a class="reference internal" href="/docs/sort-based-and-hash-based-memory-constrained-operators/">Sort-Based and Hash-Based Memory-Constrained Operators</a></li>
-
- <li class="toctree-l3"><a class="reference internal" href="/docs/enabling-query-queuing/">Enabling Query Queuing</a></li>
-
- <li class="toctree-l3"><a class="reference internal" href="/docs/controlling-parallelization-to-balance-performance-with-multi-tenancy/">Controlling Parallelization to Balance Performance with Multi-Tenancy</a></li>
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- </ul>
-
-
-
- <li class="toctree-l2"><a href="javascript: void(0);">Identifying Performance Issues</a></li>
- <ul style="display: none">
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- <li class="toctree-l3"><a class="reference internal" href="/docs/query-plans/">Query Plans</a></li>
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- <li class="toctree-l3"><a class="reference internal" href="/docs/query-profiles/">Query Profiles</a></li>
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- </ul>
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-
-
- <li class="toctree-l2"><a href="javascript: void(0);">Performance Tuning Reference</a></li>
- <ul style="display: none">
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- <li class="toctree-l3"><a class="reference internal" href="/docs/query-profile-column-descriptions/">Query Profile Column Descriptions</a></li>
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- <li class="toctree-l3"><a class="reference internal" href="/docs/physical-operators/">Physical Operators</a></li>
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- </ul>
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-
- </ul>
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-
-
- <li class="toctree-l1"><a href="javascript: void(0);">Log and Debug</a></li>
- <ul style="display: none">
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- <li class="toctree-l2"><a class="reference internal" href="/docs/log-and-debug-introduction/">Log and Debug Introduction</a></li>
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-
-
- <li class="toctree-l2"><a class="reference internal" href="/docs/error-messages/">Error Messages</a></li>
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-
-
- <li class="toctree-l2"><a class="reference internal" href="/docs/modify-logback-xml/">Modify logback.xml</a></li>
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-
-
- <li class="toctree-l2"><a class="reference internal" href="/docs/review-the-java-stack-trace/">Review the Java Stack Trace</a></li>
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-
-
- <li class="toctree-l2"><a class="reference internal" href="/docs/query-audit-logging/">Query Audit Logging</a></li>
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-
- </ul>
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-
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- <li class="toctree-l1"><a href="javascript: void(0);">SQL Reference</a></li>
- <ul style="display: none">
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- <li class="toctree-l2"><a class="reference internal" href="/docs/sql-reference-introduction/">SQL Reference Introduction</a></li>
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- <li class="toctree-l2"><a href="javascript: void(0);">Data Types</a></li>
- <ul style="display: none">
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- <li class="toctree-l3"><a class="reference internal" href="/docs/supported-data-types/">Supported Data Types</a></li>
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- <li class="toctree-l3"><a class="reference internal" href="/docs/date-time-and-timestamp/">Date, Time, and Timestamp</a></li>
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- <li class="toctree-l3"><a class="reference internal" href="/docs/handling-different-data-types/">Handling Different Data Types</a></li>
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- </ul>
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- <li class="toctree-l2"><a class="reference internal" href="/docs/lexical-structure/">Lexical Structure</a></li>
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- <li class="toctree-l2"><a class="reference internal" href="/docs/operators/">Operators</a></li>
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- <li class="toctree-l2"><a href="javascript: void(0);">SQL Functions</a></li>
- <ul style="display: none">
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- <li class="toctree-l3"><a class="reference internal" href="/docs/about-sql-function-examples/">About SQL Function Examples</a></li>
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- <li class="toctree-l3"><a class="reference internal" href="/docs/math-and-trig/">Math and Trig</a></li>
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- <li class="toctree-l3"><a class="reference internal" href="/docs/data-type-conversion/">Data Type Conversion</a></li>
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- <li class="toctree-l3"><a class="reference internal" href="/docs/date-time-functions-and-arithmetic/">Date/Time Functions and Arithmetic</a></li>
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- <li class="toctree-l3"><a class="reference internal" href="/docs/string-manipulation/">String Manipulation</a></li>
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- <li class="toctree-l3"><a class="reference internal" href="/docs/aggregate-and-aggregate-statistical/">Aggregate and Aggregate Statistical</a></li>
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- <li class="toctree-l3"><a class="reference internal" href="/docs/functions-for-handling-nulls/">Functions for Handling Nulls</a></li>
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- </ul>
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- <li class="toctree-l2"><a href="javascript: void(0);">SQL Window Functions</a></li>
- <ul style="display: none">
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- <li class="toctree-l3"><a class="reference internal" href="/docs/sql-window-functions-introduction/">SQL Window Functions Introduction</a></li>
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- <li class="toctree-l3"><a class="reference internal" href="/docs/aggregate-window-functions/">Aggregate Window Functions</a></li>
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- <li class="toctree-l3"><a class="reference internal" href="/docs/ranking-window-functions/">Ranking Window Functions</a></li>
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- <li class="toctree-l3"><a class="reference internal" href="/docs/sql-window-functions-examples/">SQL Window Functions Examples</a></li>
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- </ul>
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- <li class="toctree-l2"><a href="javascript: void(0);">Nested Data Functions</a></li>
- <ul style="display: none">
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- <li class="toctree-l3"><a class="reference internal" href="/docs/nested-data-limitations/">Nested Data Limitations</a></li>
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- <li class="toctree-l3"><a class="reference internal" href="/docs/flatten/">FLATTEN</a></li>
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- <li class="toctree-l3"><a class="reference internal" href="/docs/kvgen/">KVGEN</a></li>
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- <li class="toctree-l3"><a class="reference internal" href="/docs/repeated-count/">REPEATED_COUNT</a></li>
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- <li class="toctree-l3"><a class="reference internal" href="/docs/repeated-contains/">REPEATED_CONTAINS</a></li>
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- </ul>
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- <li class="toctree-l2"><a class="reference internal" href="/docs/query-directory-functions/">Query Directory Functions</a></li>
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- <li class="toctree-l2"><a href="javascript: void(0);">SQL Commands</a></li>
- <ul style="display: none">
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- <li class="toctree-l3"><a class="reference internal" href="/docs/supported-sql-commands/">Supported SQL Commands</a></li>
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- <li class="toctree-l3"><a class="reference internal" href="/docs/alter-session/">ALTER SESSION</a></li>
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- <li class="toctree-l3"><a class="reference internal" href="/docs/alter-system/">ALTER SYSTEM</a></li>
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- <li class="toctree-l3"><a class="reference internal" href="/docs/create-table-as-ctas/">CREATE TABLE AS (CTAS)</a></li>
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- <li class="toctree-l3"><a class="reference internal" href="/docs/partition-by-clause/">PARTITION BY Clause</a></li>
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- <li class="toctree-l3"><a class="reference internal" href="/docs/create-view/">CREATE VIEW</a></li>
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- <li class="toctree-l3"><a class="reference internal" href="/docs/drop-view/">DROP VIEW</a></li>
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- <li class="toctree-l3"><a class="reference internal" href="/docs/describe/">DESCRIBE</a></li>
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- <li class="toctree-l3"><a class="reference internal" href="/docs/explain/">EXPLAIN</a></li>
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- <li class="toctree-l3"><a class="reference internal" href="/docs/select/">SELECT</a></li>
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- <li class="toctree-l3"><a class="reference internal" href="/docs/select-list/">SELECT List</a></li>
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- <li class="toctree-l3"><a class="reference internal" href="/docs/from-clause/">FROM Clause</a></li>
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- <li class="toctree-l3"><a class="reference internal" href="/docs/group-by-clause/">GROUP BY Clause</a></li>
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- <li class="toctree-l3"><a class="reference internal" href="/docs/having-clause/">HAVING Clause</a></li>
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- <li class="toctree-l3"><a class="reference internal" href="/docs/limit-clause/">LIMIT Clause</a></li>
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- <li class="toctree-l3"><a class="reference internal" href="/docs/offset-clause/">OFFSET Clause</a></li>
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- <li class="toctree-l3"><a class="reference internal" href="/docs/order-by-clause/">ORDER BY Clause</a></li>
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- <li class="toctree-l3"><a class="reference internal" href="/docs/union-set-operator/">UNION Set Operator</a></li>
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- <li class="toctree-l3"><a class="reference internal" href="/docs/where-clause/">WHERE Clause</a></li>
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- <li class="toctree-l3"><a class="reference internal" href="/docs/with-clause/">WITH Clause</a></li>
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- <li class="toctree-l3"><a class="reference internal" href="/docs/show-databases-and-show-schemas/">SHOW DATABASES and SHOW SCHEMAS</a></li>
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- <li class="toctree-l3"><a class="reference internal" href="/docs/show-files/">SHOW FILES</a></li>
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- <li class="toctree-l3"><a class="reference internal" href="/docs/show-tables/">SHOW TABLES</a></li>
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- <li class="toctree-l3"><a class="reference internal" href="/docs/use/">USE</a></li>
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- </ul>
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- <li class="toctree-l2"><a href="javascript: void(0);">SQL Conditional Expressions</a></li>
- <ul style="display: none">
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- <li class="toctree-l3"><a class="reference internal" href="/docs/case/">CASE</a></li>
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- </ul>
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- <li class="toctree-l2"><a class="reference internal" href="/docs/reserved-keywords/">Reserved Keywords</a></li>
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- <li class="toctree-l2"><a class="reference internal" href="/docs/sql-extensions/">SQL Extensions</a></li>
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- </ul>
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- <li class="toctree-l1"><a href="javascript: void(0);">Data Sources and File Formats</a></li>
- <ul style="display: none">
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- <li class="toctree-l2"><a class="reference internal" href="/docs/data-sources-and-file-formats-introduction/">Data Sources and File Formats Introduction</a></li>
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- <li class="toctree-l2"><a class="reference internal" href="/docs/hive-to-drill-data-type-mapping/">Hive-to-Drill Data Type Mapping</a></li>
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- <li class="toctree-l2"><a class="reference internal" href="/docs/deploying-and-using-a-hive-udf/">Deploying and Using a Hive UDF</a></li>
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- <li class="toctree-l2"><a class="reference internal" href="/docs/parquet-format/">Parquet Format</a></li>
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- <li class="toctree-l2"><a class="reference internal" href="/docs/json-data-model/">JSON Data Model</a></li>
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- <li class="toctree-l2"><a class="reference internal" href="/docs/text-files-csv-tsv-psv/">Text Files: CSV, TSV, PSV</a></li>
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- </ul>
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- <li class="toctree-l1 current_section "><a href="javascript: void(0);">Develop Custom Functions</a></li>
- <ul class="current_section">
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- <li class="toctree-l2"><a class="reference internal" href="/docs/develop-custom-functions-introduction/">Develop Custom Functions Introduction</a></li>
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- <li class="toctree-l2 current"><a class="reference internal" href="/docs/develop-a-simple-function/">Develop a Simple Function</a></li>
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-<li><p>Create a Maven project and add the following dependency:</p>
-<div class="highlight"><pre><code class="language-text" data-lang="text"><dependency>
-<groupId>org.apache.drill.exec</groupId>
-<artifactId>drill-java-exec</artifactId>
-<version>1.1.0</version>
-</dependency>
-</code></pre></div></li>
-<li><p>Create a class that implements the <code>DrillSimpleFunc</code> interface and identify the scope as <code>FunctionScope.SIMPLE</code>.</p>
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-<p><strong>Example</strong></p>
-<div class="highlight"><pre><code class="language-text" data-lang="text">@FunctionTemplate(name = "myaddints", scope = FunctionScope.SIMPLE, nulls = NullHandling.NULL_IF_NULL)
- public static class IntIntAdd implements DrillSimpleFunc {
-</code></pre></div></li>
-<li><p>Provide the variables used in the code in the <code>Param</code> and <code>Output</code> bit holders.</p>
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-@Param IntHolder in2;
-@Output IntHolder out;
-</code></pre></div></li>
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-<div class="highlight"><pre><code class="language-text" data-lang="text">public void setup() {
-}
-public void eval() {
- out.value = in1.value + in2.value;
-}
-</code></pre></div></li>
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- <li class="toctree-l3"><a class="reference internal" href="/docs/using-a-connection-string/">Using a Connection String</a></li>
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- <li class="toctree-l3"><a class="reference internal" href="/docs/advanced-properties/">Advanced Properties</a></li>
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- <li class="toctree-l3"><a class="reference internal" href="/docs/testing-the-odbc-connection/">Testing the ODBC Connection</a></li>
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- </ul>
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- <li class="toctree-l3"><a class="reference internal" href="/docs/connecting-to-odbc-data-sources/">Connecting to ODBC Data Sources</a></li>
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- <li class="toctree-l3"><a class="reference internal" href="/docs/tableau-examples/">Tableau Examples</a></li>
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- <li class="toctree-l3"><a class="reference internal" href="/docs/using-drill-explorer-on-windows/">Using Drill Explorer on Windows</a></li>
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- </ul>
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- <li class="toctree-l2"><a class="reference internal" href="/docs/using-microstrategy-analytics-with-drill/">Using MicroStrategy Analytics with Drill</a></li>
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- <li class="toctree-l3"><a class="reference internal" href="/docs/querying-json-files/">Querying JSON Files</a></li>
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- <li class="toctree-l3"><a class="reference internal" href="/docs/querying-parquet-files/">Querying Parquet Files</a></li>
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- <li class="toctree-l3"><a class="reference internal" href="/docs/querying-plain-text-files/">Querying Plain Text Files</a></li>
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- <li class="toctree-l3"><a class="reference internal" href="/docs/querying-directories/">Querying Directories</a></li>
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- </ul>
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- <li class="toctree-l2"><a class="reference internal" href="/docs/querying-hbase/">Querying HBase</a></li>
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- <li class="toctree-l3"><a class="reference internal" href="/docs/selecting-flat-data/">Selecting Flat Data</a></li>
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- <li class="toctree-l3"><a class="reference internal" href="/docs/using-sql-functions-clauses-and-joins/">Using SQL Functions, Clauses, and Joins</a></li>
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- <li class="toctree-l3"><a class="reference internal" href="/docs/selecting-nested-data-for-a-column/">Selecting Nested Data for a Column</a></li>
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- <li class="toctree-l2"><a class="reference internal" href="/docs/querying-hive/">Querying Hive</a></li>
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- <li class="toctree-l2"><a class="reference internal" href="/docs/querying-system-tables/">Querying System Tables</a></li>
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- <li class="toctree-l3"><a class="reference internal" href="/docs/aggregate-and-aggregate-statistical/">Aggregate and Aggregate Statistical</a></li>
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- <li class="toctree-l3"><a class="reference internal" href="/docs/kvgen/">KVGEN</a></li>
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- <li class="toctree-l3"><a class="reference internal" href="/docs/repeated-count/">REPEATED_COUNT</a></li>
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- <li class="toctree-l3"><a class="reference internal" href="/docs/repeated-contains/">REPEATED_CONTAINS</a></li>
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- </ul>
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- <li class="toctree-l2"><a class="reference internal" href="/docs/query-directory-functions/">Query Directory Functions</a></li>
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- <li class="toctree-l3"><a class="reference internal" href="/docs/alter-system-command/">ALTER SYSTEM Command</a></li>
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- <li class="toctree-l3"><a class="reference internal" href="/docs/create-table-as-ctas-command/">CREATE TABLE AS (CTAS) command</a></li>
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- <li class="toctree-l3"><a class="reference internal" href="/docs/create-view-command/">CREATE VIEW command</a></li>
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- <li class="toctree-l3"><a class="reference internal" href="/docs/describe-command/">DESCRIBE Command</a></li>
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- <li class="toctree-l3"><a class="reference internal" href="/docs/explain-commands/">EXPLAIN commands</a></li>
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- <li class="toctree-l3"><a class="reference internal" href="/docs/select-statements/">SELECT Statements</a></li>
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- <li class="toctree-l3"><a class="reference internal" href="/docs/show-databases-and-show-schemas-command/">SHOW DATABASES AND SHOW SCHEMAS Command</a></li>
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- <li class="toctree-l3"><a class="reference internal" href="/docs/show-files-command/">SHOW FILES Command</a></li>
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- <li class="toctree-l3"><a class="reference internal" href="/docs/show-tables-command/">SHOW TABLES Command</a></li>
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- <li class="toctree-l3"><a class="reference internal" href="/docs/use-command/">USE Command</a></li>
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- </ul>
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- <li class="toctree-l2"><a class="reference internal" href="/docs/data-sources-and-file-formats-introduction/">Data Sources and File Formats Introduction</a></li>
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- <li class="toctree-l2"><a class="reference internal" href="/docs/deploying-and-using-a-hive-udf/">Deploying and Using a Hive UDF</a></li>
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- <li class="toctree-l2"><a class="reference internal" href="/docs/parquet-format/">Parquet Format</a></li>
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- <li class="toctree-l2"><a class="reference internal" href="/docs/json-data-model/">JSON Data Model</a></li>
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-
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- <li class="toctree-l2"><a class="reference internal" href="/docs/develop-custom-functions-introduction/">Develop Custom Functions Introduction</a></li>
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- <li class="toctree-l2"><a class="reference internal" href="/docs/develop-a-simple-function/">Develop a Simple Function</a></li>
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- <li class="toctree-l2"><a class="reference internal" href="/docs/developing-an-aggregate-function/">Developing an Aggregate Function</a></li>
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- <li class="toctree-l2"><a class="reference internal" href="/docs/adding-custom-functions-to-drill/">Adding Custom Functions to Drill</a></li>
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-
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- <li class="toctree-l2"><a class="reference internal" href="/docs/manage-drill-introduction/">Manage Drill Introduction</a></li>
-
-
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- <li class="toctree-l2"><a class="reference internal" href="/docs/configuring-drill-in-a-dedicated-cluster/">Configuring Drill in a Dedicated Cluster</a></li>
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- <li class="toctree-l2"><a href="javascript: void(0);">Configuring a Multitenant Cluster</a></li>
- <ul style="display: none">
-
- <li class="toctree-l3"><a class="reference internal" href="/docs/configuring-a-multitenant-cluster-introduction/">Configuring a Multitenant Cluster Introduction</a></li>
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- <li class="toctree-l3"><a class="reference internal" href="/docs/configuring-multitenant-resources/">Configuring Multitenant Resources</a></li>
-
- <li class="toctree-l3"><a class="reference internal" href="/docs/configuring-resources-for-a-shared-drillbit/">Configuring Resources for a Shared Drillbit</a></li>
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- <li class="toctree-l2"><a class="reference internal" href="/docs/monitoring-and-canceling-queries-in-the-drill-web-ui/">Monitoring and Canceling Queries in the Drill Web UI</a></li>
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- <p>Complete the following steps to install Apache Drill on a machine running
-Linux:</p>
-
-<ol>
-<li><p>Issue the following command to download the latest, stable version of Apache Drill to a directory on your machine:</p>
-<div class="highlight"><pre><code class="language-text" data-lang="text">wget http://getdrill.org/drill/download/apache-drill-0.8.0.tar.gz
-</code></pre></div></li>
-<li><p>Issue the following command to create a new directory to which you can extract the contents of the Drill <code>tar.gz</code> file:</p>
-<div class="highlight"><pre><code class="language-text" data-lang="text">sudo mkdir -p /opt/drill
-</code></pre></div></li>
-<li><p>Navigate to the directory where you downloaded the Drill <code>tar.gz</code> file.</p></li>
-<li><p>Issue the following command to extract the contents of the Drill <code>tar.gz</code> file to the directory you created:</p>
-<div class="highlight"><pre><code class="language-text" data-lang="text">sudo tar -xvzf apache-drill-<version>.tar.gz -C /opt/drill
-</code></pre></div></li>
-<li><p>Issue the following command to navigate to the Drill installation directory:</p>
-<div class="highlight"><pre><code class="language-text" data-lang="text">cd /opt/drill/apache-drill-<version>
-</code></pre></div>
-<p>At this point, you can <a href="/docs/starting-stopping-drill">invoke
-SQLLine</a> to run Drill.</p></li>
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-<div class="highlight"><pre><code class="language-text" data-lang="text">$ pwd
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-<li><p>Issue the following command to navigate to the <code>apache-drill-<version></code> directory:</p>
-<div class="highlight"><pre><code class="language-text" data-lang="text">cd /Users/max/drill/apache-drill-<version>
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- <li class="toctree-l2"><a class="reference internal" href="/docs/configuring-user-impersonation-with-hive-authorization/">Configuring User Impersonation with Hive Authorization</a></li>
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- <li class="toctree-l2"><a class="reference internal" href="/docs/configuring-web-ui-and-rest-api-security/">Configuring Web UI and REST API Security</a></li>
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- <li class="toctree-l2"><a href="javascript: void(0);">Configuration Options</a></li>
- <ul style="display: none">
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- <li class="toctree-l3"><a class="reference internal" href="/docs/configuration-options-introduction/">Configuration Options Introduction</a></li>
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- <li class="toctree-l3"><a class="reference internal" href="/docs/start-up-options/">Start-Up Options</a></li>
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- <li class="toctree-l3"><a class="reference internal" href="/docs/planning-and-execution-options/">Planning and Execution Options</a></li>
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- <li class="toctree-l3"><a class="reference internal" href="/docs/persistent-configuration-storage/">Persistent Configuration Storage</a></li>
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- </ul>
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- <li class="toctree-l2"><a class="reference internal" href="/docs/ports-used-by-drill/">Ports Used by Drill</a></li>
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- <li class="toctree-l2"><a class="reference internal" href="/docs/configuring-the-drill-shell/">Configuring the Drill Shell</a></li>
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-
- </ul>
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-
- <li class="toctree-l1"><a href="javascript: void(0);">Connect a Data Source</a></li>
- <ul style="display: none">
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- <li class="toctree-l2"><a class="reference internal" href="/docs/connect-a-data-source-introduction/">Connect a Data Source Introduction</a></li>
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- <li class="toctree-l2"><a class="reference internal" href="/docs/storage-plugin-registration/">Storage Plugin Registration</a></li>
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- <li class="toctree-l2"><a href="javascript: void(0);">Storage Plugin Configuration</a></li>
- <ul style="display: none">
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- <li class="toctree-l3"><a class="reference internal" href="/docs/plugin-configuration-basics/">Plugin Configuration Basics</a></li>
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- <li class="toctree-l3"><a class="reference internal" href="/docs/file-system-storage-plugin/">File System Storage Plugin</a></li>
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- <li class="toctree-l3"><a class="reference internal" href="/docs/workspaces/">Workspaces</a></li>
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- <li class="toctree-l3"><a class="reference internal" href="/docs/hbase-storage-plugin/">HBase Storage Plugin</a></li>
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- <li class="toctree-l3"><a class="reference internal" href="/docs/hive-storage-plugin/">Hive Storage Plugin</a></li>
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- <li class="toctree-l3"><a class="reference internal" href="/docs/drill-default-input-format/">Drill Default Input Format</a></li>
-
- </ul>
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- <li class="toctree-l2"><a class="reference internal" href="/docs/mongodb-plugin-for-apache-drill/">MongoDB Plugin for Apache Drill</a></li>
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- <li class="toctree-l2"><a class="reference internal" href="/docs/mapr-db-format/">MapR-DB Format</a></li>
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-
- </ul>
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- <li class="toctree-l1"><a href="javascript: void(0);">ODBC/JDBC Interfaces</a></li>
- <ul style="display: none">
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- <li class="toctree-l2"><a class="reference internal" href="/docs/interfaces-introduction/">Interfaces Introduction</a></li>
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- <li class="toctree-l2"><a class="reference internal" href="/docs/using-the-jdbc-driver/">Using the JDBC Driver</a></li>
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-
- <li class="toctree-l2"><a class="reference internal" href="/docs/using-jdbc-with-squirrel-on-windows/">Using JDBC with SQuirreL on Windows</a></li>
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- <li class="toctree-l2"><a href="javascript: void(0);">Installing the ODBC Driver</a></li>
- <ul style="display: none">
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- <li class="toctree-l3"><a class="reference internal" href="/docs/installing-the-driver-on-linux/">Installing the Driver on Linux</a></li>
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- <li class="toctree-l3"><a class="reference internal" href="/docs/installing-the-driver-on-mac-os-x/">Installing the Driver on Mac OS X</a></li>
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- <li class="toctree-l3"><a class="reference internal" href="/docs/installing-the-driver-on-windows/">Installing the Driver on Windows</a></li>
-
- <li class="toctree-l3"><a class="reference internal" href="/docs/installing-the-tdc-file-on-windows/">Installing the TDC File on Windows</a></li>
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- </ul>
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-
-
- <li class="toctree-l2"><a href="javascript: void(0);">Configuring ODBC</a></li>
- <ul style="display: none">
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- <li class="toctree-l3"><a class="reference internal" href="/docs/odbc-configuration-reference/">ODBC Configuration Reference</a></li>
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- <li class="toctree-l3"><a class="reference internal" href="/docs/configuring-odbc-on-linux/">Configuring ODBC on Linux</a></li>
-
- <li class="toctree-l3"><a class="reference internal" href="/docs/configuring-odbc-on-mac-os-x/">Configuring ODBC on Mac OS X</a></li>
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- <li class="toctree-l3"><a class="reference internal" href="/docs/configuring-odbc-on-windows/">Configuring ODBC on Windows</a></li>
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- <li class="toctree-l3"><a class="reference internal" href="/docs/testing-the-odbc-connection/">Testing the ODBC Connection</a></li>
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- </ul>
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- <li class="toctree-l2"><a href="javascript: void(0);">Using Drill Explorer</a></li>
- <ul style="display: none">
-
- <li class="toctree-l3"><a class="reference internal" href="/docs/drill-explorer-introduction/">Drill Explorer Introduction</a></li>
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- <li class="toctree-l3"><a class="reference internal" href="/docs/connecting-drill-explorer-to-data/">Connecting Drill Explorer to Data</a></li>
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- <li class="toctree-l3"><a class="reference internal" href="/docs/browsing-data-and-defining-views/">Browsing Data and Defining Views</a></li>
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- </ul>
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- <li class="toctree-l2"><a href="javascript: void(0);">Using Drill with BI Tools</a></li>
- <ul style="display: none">
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- <li class="toctree-l3"><a class="reference internal" href="/docs/using-drill-with-bi-tools-introduction/">Using Drill with BI Tools Introduction</a></li>
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- <li class="toctree-l3"><a class="reference internal" href="/docs/tableau-examples/">Tableau Examples</a></li>
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- <li class="toctree-l3"><a class="reference internal" href="/docs/using-microstrategy-analytics-with-apache-drill/">Using MicroStrategy Analytics with Apache Drill</a></li>
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- <li class="toctree-l3"><a class="reference internal" href="/docs/using-tibco-spotfire-desktop-with-drill/">Using Tibco Spotfire Desktop with Drill</a></li>
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- <li class="toctree-l3"><a class="reference internal" href="/docs/configuring-tibco-spotfire-server-with-drill/">Configuring Tibco Spotfire Server with Drill</a></li>
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- <li class="toctree-l3"><a class="reference internal" href="/docs/using-apache-drill-with-tableau-9-desktop/">Using Apache Drill with Tableau 9 Desktop</a></li>
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- <li class="toctree-l3"><a class="reference internal" href="/docs/using-apache-drill-with-tableau-9-server/">Using Apache Drill with Tableau 9 Server</a></li>
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- <li class="toctree-l3"><a class="reference internal" href="/docs/configuring-jreport-with-drill/">Configuring JReport with Drill</a></li>
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- </ul>
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-
- </ul>
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- <li class="toctree-l1"><a href="javascript: void(0);">Query Data</a></li>
- <ul style="display: none">
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- <li class="toctree-l2"><a class="reference internal" href="/docs/query-data-introduction/">Query Data Introduction</a></li>
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- <li class="toctree-l2"><a href="javascript: void(0);">Querying a File System</a></li>
- <ul style="display: none">
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- <li class="toctree-l3"><a class="reference internal" href="/docs/querying-a-file-system-introduction/">Querying a File System Introduction</a></li>
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- <li class="toctree-l3"><a class="reference internal" href="/docs/querying-json-files/">Querying JSON Files</a></li>
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- <li class="toctree-l3"><a class="reference internal" href="/docs/querying-parquet-files/">Querying Parquet Files</a></li>
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- <li class="toctree-l3"><a class="reference internal" href="/docs/querying-plain-text-files/">Querying Plain Text Files</a></li>
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- <li class="toctree-l3"><a class="reference internal" href="/docs/querying-directories/">Querying Directories</a></li>
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- </ul>
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- <li class="toctree-l2"><a class="reference internal" href="/docs/querying-hbase/">Querying HBase</a></li>
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- <li class="toctree-l2"><a href="javascript: void(0);">Querying Complex Data</a></li>
- <ul style="display: none">
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- <li class="toctree-l3"><a class="reference internal" href="/docs/querying-complex-data-introduction/">Querying Complex Data Introduction</a></li>
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- <li class="toctree-l3"><a class="reference internal" href="/docs/sample-data-donuts/">Sample Data: Donuts</a></li>
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- <li class="toctree-l3"><a class="reference internal" href="/docs/selecting-flat-data/">Selecting Flat Data</a></li>
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- <li class="toctree-l3"><a class="reference internal" href="/docs/using-sql-functions-clauses-and-joins/">Using SQL Functions, Clauses, and Joins</a></li>
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- <li class="toctree-l3"><a class="reference internal" href="/docs/selecting-nested-data-for-a-column/">Selecting Nested Data for a Column</a></li>
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- <li class="toctree-l3"><a class="reference internal" href="/docs/selecting-multiple-columns-within-nested-data/">Selecting Multiple Columns Within Nested Data</a></li>
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- </ul>
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- <li class="toctree-l2"><a class="reference internal" href="/docs/querying-hive/">Querying Hive</a></li>
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- <li class="toctree-l2"><a class="reference internal" href="/docs/querying-the-information-schema/">Querying the INFORMATION SCHEMA</a></li>
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- <li class="toctree-l2"><a class="reference internal" href="/docs/querying-system-tables/">Querying System Tables</a></li>
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- <li class="toctree-l2"><a class="reference internal" href="/docs/monitoring-and-canceling-queries-in-the-drill-web-ui/">Monitoring and Canceling Queries in the Drill Web UI</a></li>
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- </ul>
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-
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- <li class="toctree-l1"><a href="javascript: void(0);">Performance Tuning</a></li>
- <ul style="display: none">
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- <li class="toctree-l2"><a class="reference internal" href="/docs/performance-tuning-introduction/">Performance Tuning Introduction</a></li>
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- <li class="toctree-l2"><a class="reference internal" href="/docs/partition-pruning/">Partition Pruning</a></li>
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-
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- <li class="toctree-l2"><a class="reference internal" href="/docs/choosing-a-storage-format/">Choosing a Storage Format</a></li>
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- <li class="toctree-l2"><a href="javascript: void(0);">Query Plans and Tuning</a></li>
- <ul style="display: none">
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- <li class="toctree-l3"><a class="reference internal" href="/docs/query-plans-and-tuning-introduction/">Query Plans and Tuning Introduction</a></li>
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- <li class="toctree-l3"><a class="reference internal" href="/docs/join-planning-guidelines/">Join Planning Guidelines</a></li>
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- <li class="toctree-l3"><a class="reference internal" href="/docs/guidelines-for-optimizing-aggregation/">Guidelines for Optimizing Aggregation</a></li>
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- <li class="toctree-l3"><a class="reference internal" href="/docs/modifying-query-planning-options/">Modifying Query Planning Options</a></li>
-
- <li class="toctree-l3"><a class="reference internal" href="/docs/sort-based-and-hash-based-memory-constrained-operators/">Sort-Based and Hash-Based Memory-Constrained Operators</a></li>
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- <li class="toctree-l3"><a class="reference internal" href="/docs/enabling-query-queuing/">Enabling Query Queuing</a></li>
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- <li class="toctree-l3"><a class="reference internal" href="/docs/controlling-parallelization-to-balance-performance-with-multi-tenancy/">Controlling Parallelization to Balance Performance with Multi-Tenancy</a></li>
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- </ul>
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-
-
- <li class="toctree-l2"><a href="javascript: void(0);">Identifying Performance Issues</a></li>
- <ul style="display: none">
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- <li class="toctree-l3"><a class="reference internal" href="/docs/query-plans/">Query Plans</a></li>
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- <li class="toctree-l3"><a class="reference internal" href="/docs/query-profiles/">Query Profiles</a></li>
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- </ul>
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- <li class="toctree-l2"><a href="javascript: void(0);">Performance Tuning Reference</a></li>
- <ul style="display: none">
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- <li class="toctree-l3"><a class="reference internal" href="/docs/query-profile-column-descriptions/">Query Profile Column Descriptions</a></li>
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- <li class="toctree-l3"><a class="reference internal" href="/docs/physical-operators/">Physical Operators</a></li>
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- </ul>
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- </ul>
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- <li class="toctree-l1"><a href="javascript: void(0);">Log and Debug</a></li>
- <ul style="display: none">
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- <li class="toctree-l2"><a class="reference internal" href="/docs/log-and-debug-introduction/">Log and Debug Introduction</a></li>
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- <li class="toctree-l2"><a class="reference internal" href="/docs/error-messages/">Error Messages</a></li>
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-
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- <li class="toctree-l2"><a class="reference internal" href="/docs/modify-logback-xml/">Modify logback.xml</a></li>
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- <li class="toctree-l2"><a class="reference internal" href="/docs/review-the-java-stack-trace/">Review the Java Stack Trace</a></li>
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-
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- <li class="toctree-l2"><a class="reference internal" href="/docs/query-audit-logging/">Query Audit Logging</a></li>
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- </ul>
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- <li class="toctree-l1"><a href="javascript: void(0);">SQL Reference</a></li>
- <ul style="display: none">
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- <li class="toctree-l2"><a class="reference internal" href="/docs/sql-reference-introduction/">SQL Reference Introduction</a></li>
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- <li class="toctree-l2"><a href="javascript: void(0);">Data Types</a></li>
- <ul style="display: none">
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- <li class="toctree-l3"><a class="reference internal" href="/docs/supported-data-types/">Supported Data Types</a></li>
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- <li class="toctree-l3"><a class="reference internal" href="/docs/date-time-and-timestamp/">Date, Time, and Timestamp</a></li>
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- <li class="toctree-l3"><a class="reference internal" href="/docs/handling-different-data-types/">Handling Different Data Types</a></li>
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- </ul>
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- <li class="toctree-l2"><a class="reference internal" href="/docs/lexical-structure/">Lexical Structure</a></li>
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- <li class="toctree-l2"><a class="reference internal" href="/docs/operators/">Operators</a></li>
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- <li class="toctree-l2"><a href="javascript: void(0);">SQL Functions</a></li>
- <ul style="display: none">
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- <li class="toctree-l3"><a class="reference internal" href="/docs/about-sql-function-examples/">About SQL Function Examples</a></li>
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- <li class="toctree-l3"><a class="reference internal" href="/docs/math-and-trig/">Math and Trig</a></li>
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- <li class="toctree-l3"><a class="reference internal" href="/docs/data-type-conversion/">Data Type Conversion</a></li>
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- <li class="toctree-l3"><a class="reference internal" href="/docs/date-time-functions-and-arithmetic/">Date/Time Functions and Arithmetic</a></li>
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- <li class="toctree-l3"><a class="reference internal" href="/docs/string-manipulation/">String Manipulation</a></li>
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- <li class="toctree-l3"><a class="reference internal" href="/docs/aggregate-and-aggregate-statistical/">Aggregate and Aggregate Statistical</a></li>
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- <li class="toctree-l3"><a class="reference internal" href="/docs/functions-for-handling-nulls/">Functions for Handling Nulls</a></li>
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- </ul>
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- <li class="toctree-l2"><a href="javascript: void(0);">SQL Window Functions</a></li>
- <ul style="display: none">
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- <li class="toctree-l3"><a class="reference internal" href="/docs/sql-window-functions-introduction/">SQL Window Functions Introduction</a></li>
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- <li class="toctree-l3"><a class="reference internal" href="/docs/aggregate-window-functions/">Aggregate Window Functions</a></li>
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- <li class="toctree-l3"><a class="reference internal" href="/docs/ranking-window-functions/">Ranking Window Functions</a></li>
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- <li class="toctree-l3"><a class="reference internal" href="/docs/value-window-functions/">Value Window Functions</a></li>
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- <li class="toctree-l3"><a class="reference internal" href="/docs/sql-window-functions-examples/">SQL Window Functions Examples</a></li>
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- </ul>
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- <li class="toctree-l2"><a href="javascript: void(0);">Nested Data Functions</a></li>
- <ul style="display: none">
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- <li class="toctree-l3"><a class="reference internal" href="/docs/nested-data-limitations/">Nested Data Limitations</a></li>
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- <li class="toctree-l3"><a class="reference internal" href="/docs/flatten/">FLATTEN</a></li>
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- <li class="toctree-l3"><a class="reference internal" href="/docs/kvgen/">KVGEN</a></li>
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- <li class="toctree-l3"><a class="reference internal" href="/docs/repeated-count/">REPEATED_COUNT</a></li>
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- <li class="toctree-l3"><a class="reference internal" href="/docs/repeated-contains/">REPEATED_CONTAINS</a></li>
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- </ul>
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- <li class="toctree-l2"><a class="reference internal" href="/docs/query-directory-functions/">Query Directory Functions</a></li>
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- <li class="toctree-l2"><a href="javascript: void(0);">SQL Commands</a></li>
- <ul style="display: none">
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- <li class="toctree-l3"><a class="reference internal" href="/docs/supported-sql-commands/">Supported SQL Commands</a></li>
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- <li class="toctree-l3"><a class="reference internal" href="/docs/alter-session/">ALTER SESSION</a></li>
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- <li class="toctree-l3"><a class="reference internal" href="/docs/alter-system/">ALTER SYSTEM</a></li>
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- <li class="toctree-l3"><a class="reference internal" href="/docs/create-table-as-ctas/">CREATE TABLE AS (CTAS)</a></li>
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- <li class="toctree-l3"><a class="reference internal" href="/docs/partition-by-clause/">PARTITION BY Clause</a></li>
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- <li class="toctree-l3"><a class="reference internal" href="/docs/create-view/">CREATE VIEW</a></li>
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- <li class="toctree-l3"><a class="reference internal" href="/docs/describe/">DESCRIBE</a></li>
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- <li class="toctree-l3"><a class="reference internal" href="/docs/drop-table/">DROP TABLE</a></li>
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- <li class="toctree-l3"><a class="reference internal" href="/docs/drop-view/">DROP VIEW</a></li>
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- <li class="toctree-l3"><a class="reference internal" href="/docs/explain/">EXPLAIN</a></li>
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- <li class="toctree-l3"><a class="reference internal" href="/docs/select/">SELECT</a></li>
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- <li class="toctree-l3"><a class="reference internal" href="/docs/select-list/">SELECT List</a></li>
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- <li class="toctree-l3"><a class="reference internal" href="/docs/from-clause/">FROM Clause</a></li>
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- <li class="toctree-l3"><a class="reference internal" href="/docs/group-by-clause/">GROUP BY Clause</a></li>
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- <li class="toctree-l3"><a class="reference internal" href="/docs/having-clause/">HAVING Clause</a></li>
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- <li class="toctree-l3"><a class="reference internal" href="/docs/limit-clause/">LIMIT Clause</a></li>
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- <li class="toctree-l3"><a class="reference internal" href="/docs/offset-clause/">OFFSET Clause</a></li>
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- <li class="toctree-l3"><a class="reference internal" href="/docs/order-by-clause/">ORDER BY Clause</a></li>
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- <li class="toctree-l3"><a class="reference internal" href="/docs/union-set-operator/">UNION Set Operator</a></li>
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- <li class="toctree-l3"><a class="reference internal" href="/docs/where-clause/">WHERE Clause</a></li>
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- <li class="toctree-l3"><a class="reference internal" href="/docs/with-clause/">WITH Clause</a></li>
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- <li class="toctree-l3"><a class="reference internal" href="/docs/show-databases-and-show-schemas/">SHOW DATABASES and SHOW SCHEMAS</a></li>
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- <li class="toctree-l3"><a class="reference internal" href="/docs/show-files/">SHOW FILES</a></li>
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- <li class="toctree-l3"><a class="reference internal" href="/docs/show-tables/">SHOW TABLES</a></li>
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- <li class="toctree-l3"><a class="reference internal" href="/docs/use/">USE</a></li>
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- </ul>
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- <li class="toctree-l2"><a href="javascript: void(0);">SQL Conditional Expressions</a></li>
- <ul style="display: none">
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- <li class="toctree-l3"><a class="reference internal" href="/docs/case/">CASE</a></li>
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- </ul>
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- <li class="toctree-l2"><a class="reference internal" href="/docs/reserved-keywords/">Reserved Keywords</a></li>
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- <li class="toctree-l2"><a class="reference internal" href="/docs/sql-extensions/">SQL Extensions</a></li>
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- </ul>
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- <li class="toctree-l1"><a href="javascript: void(0);">Data Sources and File Formats</a></li>
- <ul style="display: none">
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- <li class="toctree-l2"><a class="reference internal" href="/docs/data-sources-and-file-formats-introduction/">Data Sources and File Formats Introduction</a></li>
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- <li class="toctree-l2"><a class="reference internal" href="/docs/hive-to-drill-data-type-mapping/">Hive-to-Drill Data Type Mapping</a></li>
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- <li class="toctree-l2"><a class="reference internal" href="/docs/deploying-and-using-a-hive-udf/">Deploying and Using a Hive UDF</a></li>
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- <li class="toctree-l2"><a class="reference internal" href="/docs/parquet-format/">Parquet Format</a></li>
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- <li class="toctree-l2"><a class="reference internal" href="/docs/json-data-model/">JSON Data Model</a></li>
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- <li class="toctree-l2"><a class="reference internal" href="/docs/text-files-csv-tsv-psv/">Text Files: CSV, TSV, PSV</a></li>
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- </ul>
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- <li class="toctree-l1"><a href="javascript: void(0);">Develop Custom Functions</a></li>
- <ul style="display: none">
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- <li class="toctree-l2"><a class="reference internal" href="/docs/develop-custom-functions-introduction/">Develop Custom Functions Introduction</a></li>
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- <li class="toctree-l2"><a class="reference internal" href="/docs/developing-a-simple-function/">Developing a Simple Function</a></li>
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- <li class="toctree-l2"><a class="reference internal" href="/docs/tutorial-develop-a-simple-function/">Tutorial: Develop a Simple Function</a></li>
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- <li class="toctree-l2"><a class="reference internal" href="/docs/developing-an-aggregate-function/">Developing an Aggregate Function</a></li>
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- <li class="toctree-l2"><a class="reference internal" href="/docs/adding-custom-functions-to-drill/">Adding Custom Functions to Drill</a></li>
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[51/51] [partial] drill-site git commit: Cleaning up deleted content.
Posted by br...@apache.org.
Cleaning up deleted content.
Project: http://git-wip-us.apache.org/repos/asf/drill-site/repo
Commit: http://git-wip-us.apache.org/repos/asf/drill-site/commit/d42f2cdd
Tree: http://git-wip-us.apache.org/repos/asf/drill-site/tree/d42f2cdd
Diff: http://git-wip-us.apache.org/repos/asf/drill-site/diff/d42f2cdd
Branch: refs/heads/asf-site
Commit: d42f2cdd135864e571b6ef6a1fc349b2f2b94657
Parents: bdf0f88
Author: Bridget Bevens <bb...@maprtech.com>
Authored: Fri Feb 24 16:10:32 2017 -0800
Committer: Bridget Bevens <bb...@maprtech.com>
Committed: Fri Feb 24 16:10:32 2017 -0800
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- <h1 class="post-title">Drill 1.5 Released</h1>
- </div>
- <p class="post-meta">
-
- <strong>Authors:</strong>
- <ul>
-
-
- <li>Jason Altekruse (PMC Member and Committer, Apache Drill)</li>
-
-
- <li>Bridget Bevens (Comitter, MapR Technologies)</li>
-
- </ul>
-
-<strong>Date:</strong> Feb 15, 2016
-</p>
- </header>
- <div class="addthis_sharing_toolbox"></div>
-
- <article class="post-content">
- <p>Today, we\u2019re happy to announce the availability of Drill 1.5.0, you can dowload it <a href="https://drill.apache.org/download/">here</a>.</p>
-
-<p>The release provides the following bug fixes and improvements.</p>
-
-<h2 id="web-authentication">Web Authentication</h2>
-<p>Drill 1.5 extends Drill user authentication to the Web Console and underlying REST API so administrators can control the extent of access to the Web Console and REST API client applications. Configuration docs are available <a href="https://drill.apache.org/docs/configuring-web-console-and-rest-api-security/">here</a>.</p>
-
-<h2 id="kudu-support">Kudu Support</h2>
-<p>Drill now includes experimental support for querying the Apache Kudu (incubating) scalable columnar database.</p>
-
-<h2 id="improved-memory-allocator">Improved Memory Allocator</h2>
-<p>Drill uses a new allocator that improves an operator\u2019s use of direct memory and tracks the memory use more accurately. See the <a href="https://drill.apache.org/docs/configuring-drill-memory/">Configuring Drill Memory</a> doc page for more info.</p>
-
-<h2 id="configurable-caching-of-hive-metadata">Configurable Caching of Hive Metadata</h2>
-<p>You can now configure the TTL for the Hive metadata client cache depending on how frequently the Hive metadata is updated. See the <a href="https://drill.apache.org/docs/hive-metadata-caching/">Hive Metadata Caching</a> doc page for more info.</p>
-
-<p>A complete list of JIRAs resolved in the 1.5.0 release can be found <a href="https://issues.apache.org/jira/secure/ReleaseNote.jspa?projectId=12313820&version=12332948">here</a></p>
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http://git-wip-us.apache.org/repos/asf/drill-site/blob/d42f2cdd/css/breadcrumbs.css
----------------------------------------------------------------------
diff --git a/css/breadcrumbs.css b/css/breadcrumbs.css
deleted file mode 100644
index e9503c4..0000000
--- a/css/breadcrumbs.css
+++ /dev/null
@@ -1,40 +0,0 @@
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http://git-wip-us.apache.org/repos/asf/drill-site/blob/d42f2cdd/css/code.css
----------------------------------------------------------------------
diff --git a/css/code.css b/css/code.css
deleted file mode 100644
index b06c8d2..0000000
--- a/css/code.css
+++ /dev/null
@@ -1,69 +0,0 @@
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\ No newline at end of file
http://git-wip-us.apache.org/repos/asf/drill-site/blob/d42f2cdd/css/docpage.css
----------------------------------------------------------------------
diff --git a/css/docpage.css b/css/docpage.css
deleted file mode 100644
index d7cf704..0000000
--- a/css/docpage.css
+++ /dev/null
@@ -1,389 +0,0 @@
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http://git-wip-us.apache.org/repos/asf/drill-site/blob/d42f2cdd/css/responsive.css
----------------------------------------------------------------------
diff --git a/css/responsive.css b/css/responsive.css
deleted file mode 100644
index 81714a5..0000000
--- a/css/responsive.css
+++ /dev/null
@@ -1,255 +0,0 @@
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- display: none;
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-@media (max-width: 1024px) {
- table.intro {
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- .mw {
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http://git-wip-us.apache.org/repos/asf/drill-site/blob/d42f2cdd/css/search.css
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diff --git a/css/search.css b/css/search.css
deleted file mode 100644
index 64d25c8..0000000
--- a/css/search.css
+++ /dev/null
@@ -1,9 +0,0 @@
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\ No newline at end of file
http://git-wip-us.apache.org/repos/asf/drill-site/blob/d42f2cdd/css/style.css
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diff --git a/css/style.css b/css/style.css
deleted file mode 100755
index aa8cfb5..0000000
--- a/css/style.css
+++ /dev/null
@@ -1,854 +0,0 @@
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\ No newline at end of file
http://git-wip-us.apache.org/repos/asf/drill-site/blob/d42f2cdd/css/syntax.css
----------------------------------------------------------------------
diff --git a/css/syntax.css b/css/syntax.css
deleted file mode 100644
index 2774b76..0000000
--- a/css/syntax.css
+++ /dev/null
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http://git-wip-us.apache.org/repos/asf/drill-site/blob/d42f2cdd/css/video-box.css
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http://git-wip-us.apache.org/repos/asf/drill-site/blob/d42f2cdd/css/video-slider.css
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[08/51] [partial] drill-site git commit: Cleaning up deleted content.
Posted by br...@apache.org.
http://git-wip-us.apache.org/repos/asf/drill-site/blob/d42f2cdd/docs/select-union/index.html
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- <p>The UNION set operator returns all rows in the result sets of two separate query expressions. For example, if two employee tables exist, you can use the UNION set operator to merge the two tables and build a complete list of all the employees. Drill supports UNION ALL only. Drill does not support DISTINCT.</p>
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-<h2 id="syntax">Syntax</h2>
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-<p>The UNION set operator supports the following syntax:</p>
-<div class="highlight"><pre><code class="language-text" data-lang="text"> query
- { UNION [ ALL ] }
- query
-</code></pre></div>
-<h2 id="parameters">Parameters</h2>
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-<p><em>query</em> </p>
-
-<p>Any SELECT query that Drill supports. See SELECT.</p>
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-<h2 id="usage-notes">Usage Notes</h2>
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-<ul>
-<li>The two SELECT query expressions that represent the direct operands of the UNION must produce the same number of columns. Corresponding columns must contain compatible data types. See Supported Data Types.<br></li>
-<li>Multiple UNION operators in the same SELECT statement are evaluated left to right, unless otherwise indicated by parentheses.<br></li>
-<li>You cannot use * in UNION ALL for schemaless data.</li>
-</ul>
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-<h2 id="examples">Examples</h2>
-
-<p>The following example uses the UNION ALL set operator to combine click activity data before and after a marketing campaign. The data in the example exists in the <code>dfs.clicks workspace</code>.</p>
-<div class="highlight"><pre><code class="language-text" data-lang="text"> 0: jdbc:drill:> select t.trans_id transaction, t.user_info.cust_id customer from `clicks/clicks.campaign.json` t
- union all
- select u.trans_id, u.user_info.cust_id from `clicks/clicks.json` u limit 5;
- +-------------+------------+
- | transaction | customer |
- +-------------+------------+
- | 35232 | 18520 |
- | 31995 | 17182 |
- | 35760 | 18228 |
- | 37090 | 17015 |
- | 37838 | 18737 |
- +-------------+------------+
-</code></pre></div>
-<p>This UNION ALL query returns rows that exist in two files (and includes any duplicate rows from those files): <code>clicks.campaign.json</code> and <code>clicks.json</code></p>
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-</nav>
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- <div class="main-content">
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- <a class="edit-link" href="https://github.com/apache/drill/blob/gh-pages/_docs/tutorials/learn-drill-with-the-mapr-sandbox/050-lesson-3-run-queries-on-complex-data-types.md" target="_blank"><i class="fa fa-pencil-square-o"></i></a>
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- <h1>Lession 3: Run Queries on Complex Data Types</h1>
-
- </div>
-
- <link href="/css/docpage.css" rel="stylesheet" type="text/css">
-
- <div class="int_text" align="left">
-
- <h2 id="goal">Goal</h2>
-
-<p>This lesson focuses on queries that exercise functions and operators on self-
-describing data and complex data types. Drill offers intuitive SQL extensions
-to work with such data and offers high query performance with an architecture
-built from the ground up for complex data.</p>
-
-<h2 id="queries-in-this-lesson">Queries in This Lesson</h2>
-
-<p>Now that you have run ANSI SQL queries against different tables and files with
-relational data, you can try some examples including complex types.</p>
-
-<ul>
-<li>Access directories and subdirectories of files in a single SELECT statement.</li>
-<li>Demonstrate simple ways to access complex data in JSON files.</li>
-<li>Demonstrate the repeated_count function to aggregate values in an array.</li>
-</ul>
-
-<h2 id="query-partitioned-directories">Query Partitioned Directories</h2>
-
-<p>You can use special variables in Drill to refer to subdirectories in your
-workspace path:</p>
-
-<ul>
-<li>dir0</li>
-<li>dir1</li>
-<li>\u2026</li>
-</ul>
-
-<p>Note that these variables are dynamically determined based on the partitioning
-of the file system. No up-front definitions are required on what partitions
-exist. Here is a visual example of how this works:</p>
-
-<p><img src="/docs/img/example_query.png" alt="drill query flow"></p>
-
-<h3 id="set-workspace-to-dfs.logs:">Set workspace to dfs.logs:</h3>
-<div class="highlight"><pre><code class="language-text" data-lang="text">0: jdbc:drill:> use dfs.logs;
-+------------+------------+
-| ok | summary |
-+------------+------------+
-| true | Default schema changed to 'dfs.logs' |
-+------------+------------+
-</code></pre></div>
-<h3 id="query-logs-data-for-a-specific-year:">Query logs data for a specific year:</h3>
-<div class="highlight"><pre><code class="language-text" data-lang="text">0: jdbc:drill:> select * from logs where dir0='2013' limit 10;
-+------------+------------+------------+------------+------------+------------+------------+------------+------------+------------+------------+------------+
-| dir0 | dir1 | trans_id | date | time | cust_id | device | state | camp_id | keywords | prod_id | purch_flag |
-+------------+------------+------------+------------+------------+------------+------------+------------+------------+------------+------------+------------+
-| 2013 | 2 | 12115 | 02/23/2013 | 19:48:24 | 3 | IOS5 | az | 5 | who's | 6 | false |
-| 2013 | 2 | 12127 | 02/26/2013 | 19:42:03 | 11459 | IOS5 | wa | 10 | for | 331 | false |
-| 2013 | 2 | 12138 | 02/09/2013 | 05:49:01 | 1 | IOS6 | ca | 7 | minutes | 500 | false |
-| 2013 | 2 | 12139 | 02/23/2013 | 06:58:20 | 1 | AOS4.4 | ms | 7 | i | 20 | false |
-| 2013 | 2 | 12145 | 02/10/2013 | 10:14:56 | 10 | IOS5 | mi | 6 | wrong | 42 | false |
-| 2013 | 2 | 12157 | 02/15/2013 | 02:49:22 | 102 | IOS5 | ny | 5 | want | 95 | false |
-| 2013 | 2 | 12176 | 02/19/2013 | 08:39:02 | 28 | IOS5 | or | 0 | and | 351 | false |
-| 2013 | 2 | 12194 | 02/24/2013 | 08:26:17 | 125445 | IOS5 | ar | 0 | say | 500 | true |
-| 2013 | 2 | 12236 | 02/05/2013 | 01:40:05 | 10 | IOS5 | nj | 2 | sir | 393 | false |
-| 2013 | 2 | 12249 | 02/03/2013 | 04:45:47 | 21725 | IOS5 | nj | 5 | no | 414 | false |
-+------------+------------+------------+------------+------------+------------+------------+------------+------------+------------+------------+------------+
-</code></pre></div>
-<p>This query constrains files inside the subdirectory named 2013. The variable
-dir0 refers to the first level down from logs, dir1 to the next level, and so
-on. So this query returned 10 of the rows for February 2013.</p>
-
-<h3 id="further-constrain-the-results-using-multiple-predicates-in-the-query:">Further constrain the results using multiple predicates in the query:</h3>
-
-<p>This query returns a list of customer IDs for people who made a purchase via
-an IOS5 device in August 2013.</p>
-<div class="highlight"><pre><code class="language-text" data-lang="text">0: jdbc:drill:> select dir0 as yr, dir1 as mth, cust_id from logs
-where dir0='2013' and dir1='8' and device='IOS5' and purch_flag='true'
-order by `date`;
-+------------+------------+------------+
-| yr | mth | cust_id |
-+------------+------------+------------+
-| 2013 | 8 | 4 |
-| 2013 | 8 | 521 |
-| 2013 | 8 | 1 |
-| 2013 | 8 | 2 |
-
-...
-</code></pre></div>
-<h3 id="return-monthly-counts-per-customer-for-a-given-year:">Return monthly counts per customer for a given year:</h3>
-<div class="highlight"><pre><code class="language-text" data-lang="text">0: jdbc:drill:> select cust_id, dir1 month_no, count(*) month_count from logs
-where dir0=2014 group by cust_id, dir1 order by cust_id, month_no limit 10;
-+------------+------------+-------------+
-| cust_id | month_no | month_count |
-+------------+------------+-------------+
-| 0 | 1 | 143 |
-| 0 | 2 | 118 |
-| 0 | 3 | 117 |
-| 0 | 4 | 115 |
-| 0 | 5 | 137 |
-| 0 | 6 | 117 |
-| 0 | 7 | 142 |
-| 0 | 8 | 19 |
-| 1 | 1 | 66 |
-| 1 | 2 | 59 |
-+------------+------------+-------------+
-10 rows selected
-</code></pre></div>
-<p>This query groups the aggregate function by customer ID and month for one
-year: 2014.</p>
-
-<h2 id="query-complex-data">Query Complex Data</h2>
-
-<p>Drill provides some specialized operators and functions that you can use to
-analyze nested data natively without transformation. If you are familiar with
-JavaScript notation, you will already know how some of these extensions work.</p>
-
-<h3 id="set-the-workspace-to-dfs.clicks:">Set the workspace to dfs.clicks:</h3>
-<div class="highlight"><pre><code class="language-text" data-lang="text">0: jdbc:drill:> use dfs.clicks;
-+------------+------------+
-| ok | summary |
-+------------+------------+
-| true | Default schema changed to 'dfs.clicks' |
-+------------+------------+
-</code></pre></div>
-<h3 id="explore-clickstream-data:">Explore clickstream data:</h3>
-
-<p>Note that the user_info and trans_info columns contain nested data: arrays and
-arrays within arrays. The following queries show how to access this complex
-data.</p>
-<div class="highlight"><pre><code class="language-text" data-lang="text">0: jdbc:drill:> select * from `clicks/clicks.json` limit 5;
-+------------+------------+------------+------------+------------+
-| trans_id | date | time | user_info | trans_info |
-+------------+------------+------------+------------+------------+
-| 31920 | 2014-04-26 | 12:17:12 | {"cust_id":22526,"device":"IOS5","state":"il"} | {"prod_id":[174,2],"purch_flag":"false"} |
-| 31026 | 2014-04-20 | 13:50:29 | {"cust_id":16368,"device":"AOS4.2","state":"nc"} | {"prod_id":[],"purch_flag":"false"} |
-| 33848 | 2014-04-10 | 04:44:42 | {"cust_id":21449,"device":"IOS6","state":"oh"} | {"prod_id":[582],"purch_flag":"false"} |
-| 32383 | 2014-04-18 | 06:27:47 | {"cust_id":20323,"device":"IOS5","state":"oh"} | {"prod_id":[710,47],"purch_flag":"false"} |
-| 32359 | 2014-04-19 | 23:13:25 | {"cust_id":15360,"device":"IOS5","state":"ca"} | {"prod_id": [0,8,170,173,1,124,46,764,30,711,0,3,25],"purch_flag":"true"} |
-+------------+------------+------------+------------+------------+
-</code></pre></div>
-<h3 id="unpack-the-user_info-column:">Unpack the user_info column:</h3>
-<div class="highlight"><pre><code class="language-text" data-lang="text">0: jdbc:drill:> select t.user_info.cust_id as custid, t.user_info.device as device,
-t.user_info.state as state
-from `clicks/clicks.json` t limit 5;
-+------------+------------+------------+
-| custid | device | state |
-+------------+------------+------------+
-| 22526 | IOS5 | il |
-| 16368 | AOS4.2 | nc |
-| 21449 | IOS6 | oh |
-| 20323 | IOS5 | oh |
-| 15360 | IOS5 | ca |
-+------------+------------+------------+
-</code></pre></div>
-<p>This query uses a simple table.column.column notation to extract nested column
-data. For example:</p>
-<div class="highlight"><pre><code class="language-text" data-lang="text">t.user_info.cust_id
-</code></pre></div>
-<p>where <code>t</code> is the table alias provided in the query, <code>user_info</code> is a top-level
-column name, and <code>cust_id</code> is a nested column name.</p>
-
-<p>The table alias is required; otherwise column names such as <code>user_info</code> are
-parsed as table names by the SQL parser.</p>
-
-<h3 id="unpack-the-trans_info-column:">Unpack the trans_info column:</h3>
-<div class="highlight"><pre><code class="language-text" data-lang="text">0: jdbc:drill:> select t.trans_info.prod_id as prodid, t.trans_info.purch_flag as
-purchased
-from `clicks/clicks.json` t limit 5;
-+------------+------------+
-| prodid | purchased |
-+------------+------------+
-| [174,2] | false |
-| [] | false |
-| [582] | false |
-| [710,47] | false |
-| [0,8,170,173,1,124,46,764,30,711,0,3,25] | true |
- 5 rows selected
-</code></pre></div>
-<p>Note that this result reveals that the prod_id column contains an array of IDs
-(one or more product ID values per row, separated by commas). The next step
-shows how you to access this kind of data.</p>
-
-<h2 id="query-arrays">Query Arrays</h2>
-
-<p>Now use the [n] notation, where n is the position of the value in an array,
-starting from position 0 (not 1) for the first value. You can use this
-notation to write interesting queries against nested array data.</p>
-
-<p>For example:</p>
-<div class="highlight"><pre><code class="language-text" data-lang="text">trans_info.prod_id[0]
-</code></pre></div>
-<p>refers to the first value in the nested prod_id column and</p>
-<div class="highlight"><pre><code class="language-text" data-lang="text">trans_info.prod_id[20]
-</code></pre></div>
-<p>refers to the 21st value, assuming one exists.</p>
-
-<h3 id="find-the-first-product-that-is-searched-for-in-each-transaction:">Find the first product that is searched for in each transaction:</h3>
-<div class="highlight"><pre><code class="language-text" data-lang="text">0: jdbc:drill:> select t.trans_id, t.trans_info.prod_id[0] from `clicks/clicks.json` t limit 5;
-+------------+------------+
-| trans_id | EXPR$1 |
-+------------+------------+
-| 31920 | 174 |
-| 31026 | null |
-| 33848 | 582 |
-| 32383 | 710 |
-| 32359 | 0 |
-+------------+------------+
-5 rows selected
-</code></pre></div>
-<h3 id="for-which-transactions-did-customers-search-on-at-least-21-products?">For which transactions did customers search on at least 21 products?</h3>
-<div class="highlight"><pre><code class="language-text" data-lang="text">0: jdbc:drill:> select t.trans_id, t.trans_info.prod_id[20]
-from `clicks/clicks.json` t
-where t.trans_info.prod_id[20] is not null
-order by trans_id limit 5;
-+------------+------------+
-| trans_id | EXPR$1 |
-+------------+------------+
-| 10328 | 0 |
-| 10380 | 23 |
-| 10701 | 1 |
-| 11100 | 0 |
-| 11219 | 46 |
-+------------+------------+
-5 rows selected
-</code></pre></div>
-<p>This query returns transaction IDs and product IDs for records that contain a
-non-null product ID at the 21st position in the array.</p>
-
-<h3 id="return-clicks-for-a-specific-product-range:">Return clicks for a specific product range:</h3>
-<div class="highlight"><pre><code class="language-text" data-lang="text">0: jdbc:drill:> select * from (select t.trans_id, t.trans_info.prod_id[0] as prodid,
-t.trans_info.purch_flag as purchased
-from `clicks/clicks.json` t) sq
-where sq.prodid between 700 and 750 and sq.purchased='true'
-order by sq.prodid;
-+------------+------------+------------+
-| trans_id | prodid | purchased |
-+------------+------------+------------+
-| 21886 | 704 | true |
-| 20674 | 708 | true |
-| 22158 | 709 | true |
-| 34089 | 714 | true |
-| 22545 | 714 | true |
-| 37500 | 717 | true |
-| 36595 | 718 | true |
-...
-</code></pre></div>
-<p>This query assumes that there is some meaning to the array (that it is an
-ordered list of products purchased rather than a random list).</p>
-
-<h2 id="perform-operations-on-arrays">Perform Operations on Arrays</h2>
-
-<h3 id="rank-successful-click-conversions-and-count-product-searches-for-each-session:">Rank successful click conversions and count product searches for each session:</h3>
-<div class="highlight"><pre><code class="language-text" data-lang="text">0: jdbc:drill:> select t.trans_id, t.`date` as session_date, t.user_info.cust_id as
-cust_id, t.user_info.device as device, repeated_count(t.trans_info.prod_id) as
-prod_count, t.trans_info.purch_flag as purch_flag
-from `clicks/clicks.json` t
-where t.trans_info.purch_flag = 'true' order by prod_count desc;
-+------------+--------------+------------+------------+------------+------------+
-| trans_id | session_date | cust_id | device | prod_count | purch_flag |
-+------------+--------------+------------+------------+------------+------------+
-| 37426 | 2014-04-06 | 18709 | IOS5 | 34 | true |
-| 31589 | 2014-04-16 | 18576 | IOS6 | 31 | true |
-| 11600 | 2014-04-07 | 4260 | AOS4.2 | 28 | true |
-| 35074 | 2014-04-03 | 16697 | AOS4.3 | 27 | true |
-| 17192 | 2014-04-22 | 2501 | AOS4.2 | 26 | true |
-...
-</code></pre></div>
-<p>This query uses an SQL extension, the repeated_count function, to get an
-aggregated count of the array values. The query returns the number of products
-searched for each session that converted into a purchase and ranks the counts
-in descending order. Only clicks that have resulted in a purchase are counted.</p>
-
-<h2 id="store-a-result-set-in-a-table-for-reuse-and-analysis">Store a Result Set in a Table for Reuse and Analysis</h2>
-
-<p>Finally, run another correlated subquery that returns a fairly large result
-set. To facilitate additional analysis on this result set, you can easily and
-quickly create a Drill table from the results of the query.</p>
-
-<h3 id="continue-to-use-the-dfs.clicks-workspace">Continue to use the dfs.clicks workspace</h3>
-<div class="highlight"><pre><code class="language-text" data-lang="text">0: jdbc:drill:> use dfs.clicks;
-+------------+------------+
-| ok | summary |
-+------------+------------+
-| true | Default schema changed to 'dfs.clicks' |
-+------------+------------+
-</code></pre></div>
-<h3 id="return-product-searches-for-high-value-customers:">Return product searches for high-value customers:</h3>
-<div class="highlight"><pre><code class="language-text" data-lang="text">0: jdbc:drill:> select o.cust_id, o.order_total, t.trans_info.prod_id[0] as prod_id
-from hive.orders as o, `clicks/clicks.json` t
-where o.cust_id=t.user_info.cust_id
-and o.order_total > (select avg(inord.order_total)
-from hive.orders inord where inord.state = o.state);
-+------------+-------------+------------+
-| cust_id | order_total | prod_id |
-+------------+-------------+------------+
-...
-| 9650 | 69 | 16 |
-| 9650 | 69 | 560 |
-| 9650 | 69 | 959 |
-| 9654 | 76 | 768 |
-| 9656 | 76 | 32 |
-| 9656 | 76 | 16 |
-...
-+------------+-------------+------------+
-106,281 rows selected
-</code></pre></div>
-<p>This query returns a list of products that are being searched for by customers
-who have made transactions that are above the average in their states.</p>
-
-<h3 id="materialize-the-result-of-the-previous-query:">Materialize the result of the previous query:</h3>
-<div class="highlight"><pre><code class="language-text" data-lang="text">0: jdbc:drill:> create table product_search as select o.cust_id, o.order_total, t.trans_info.prod_id[0] as prod_id
-from hive.orders as o, `clicks/clicks.json` t
-where o.cust_id=t.user_info.cust_id and o.order_total > (select avg(inord.order_total)
-from hive.orders inord where inord.state = o.state);
-+------------+---------------------------+
-| Fragment | Number of records written |
-+------------+---------------------------+
-| 0_0 | 106281 |
-+------------+---------------------------+
-1 row selected
-</code></pre></div>
-<p>This example uses a CTAS statement to create a table based on a correlated
-subquery that you ran previously. This table contains all of the rows that the
-query returns (106,281) and stores them in the format specified by the storage
-plugin (Parquet format in this example). You can create tables that store data
-in csv, parquet, and json formats.</p>
-
-<h3 id="query-the-new-table-to-verify-the-row-count:">Query the new table to verify the row count:</h3>
-
-<p>This example simply checks that the CTAS statement worked by verifying the
-number of rows in the table.</p>
-<div class="highlight"><pre><code class="language-text" data-lang="text">0: jdbc:drill:> select count(*) from product_search;
-+------------+
-| EXPR$0 |
-+------------+
-| 106281 |
-+------------+
-1 row selected
-</code></pre></div>
-<h3 id="find-the-storage-file-for-the-table:">Find the storage file for the table:</h3>
-<div class="highlight"><pre><code class="language-text" data-lang="text">[root@maprdemo product_search]# cd /mapr/demo.mapr.com/data/nested/product_search
-[root@maprdemo product_search]# ls -la
-total 451
-drwxr-xr-x. 2 mapr mapr 1 Sep 15 13:41 .
-drwxr-xr-x. 4 root root 2 Sep 15 13:41 ..
--rwxr-xr-x. 1 mapr mapr 460715 Sep 15 13:41 0_0_0.parquet
-</code></pre></div>
-<p>Note that the table is stored in a file called <code>0_0_0.parquet</code>. This file is
-stored in the location defined by the dfs.clicks workspace:</p>
-<div class="highlight"><pre><code class="language-text" data-lang="text">"location": "http://demo.mapr.com/data/nested"
-</code></pre></div>
-<p>with a subdirectory that has the same name as the table you created.</p>
-
-<h2 id="what's-next">What's Next</h2>
-
-<p>Complete the tutorial with the <a href="/docs/summary">Summary</a>.</p>
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- <h1>SELECT WITH</h1>
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- <div class="int_text" align="left">
-
- <p>The WITH clause is an optional clause used to contain one or more common table
-expressions (CTE) where each CTE defines a temporary table that exists for the
-duration of the query. Each subquery in the WITH clause specifies a table
-name, an optional list of column names, and a SELECT statement.</p>
-
-<h2 id="syntax">Syntax</h2>
-
-<p>The WITH clause supports the following syntax:</p>
-<div class="highlight"><pre><code class="language-text" data-lang="text">[ WITH with_subquery [, ...] ]
-where with_subquery is:
-with_subquery_table_name [ ( column_name [, ...] ) ] AS ( query )
-</code></pre></div>
-<h2 id="parameters">Parameters</h2>
-
-<p><em>with_subquery</em>table_name_</p>
-
-<p>A unique name for a temporary table that defines the results of a WITH clause
-subquery. You cannot use duplicate names within a single WITH clause. You must
-give each subquery a table name that can be referenced in the FROM clause.</p>
-
-<p><em>column</em>name_</p>
-
-<p>An optional list of output column names for the WITH clause subquery,
-separated by commas. The number of column names specified must be equal to or
-less than the number of columns defined by the subquery.</p>
-
-<p><em>query</em></p>
-
-<p>Any SELECT query that Drill supports. See
-<a href="/docs/SELECT+Statements">SELECT</a>.</p>
-
-<h2 id="usage-notes">Usage Notes</h2>
-
-<p>Use the WITH clause to efficiently define temporary tables that Drill can
-access throughout the execution of a single query. The WITH clause is
-typically a simpler alternative to using subqueries in the main body of the
-SELECT statement. In some cases, Drill can evaluate a WITH subquery once and
-reuse the results for query optimization.</p>
-
-<p>You can use a WITH clause in the following SQL statements:</p>
-
-<ul>
-<li><p>SELECT (including subqueries within SELECT statements)</p></li>
-<li><p>CREATE TABLE AS</p></li>
-<li><p>CREATE VIEW</p></li>
-<li><p>EXPLAIN</p></li>
-</ul>
-
-<p>You can reference the temporary tables in the FROM clause of the query. If the
-FROM clause does not reference any tables defined by the WITH clause, Drill
-ignores the WITH clause and executes the query as normal.</p>
-
-<p>Drill can only reference a table defined by a WITH clause subquery in the
-scope of the SELECT query that the WITH clause begins. For example, you can
-reference such a table in the FROM clause of a subquery in the SELECT list,
-WHERE clause, or HAVING clause. You cannot use a WITH clause in a subquery and
-reference its table in the FROM clause of the main query or another subquery.</p>
-
-<p>You cannot specify another WITH clause inside a WITH clause subquery.</p>
-
-<p>For example, the following query includes a forward reference to table t2 in
-the definition of table t1:</p>
-
-<h2 id="example">Example</h2>
-
-<p>The following example shows the WITH clause used to create a WITH query named
-<code>emp_data</code> that selects all of the rows from the <code>employee.json</code> file. The
-main query selects the <code>full_name, position_title, salary</code>, and <code>hire_date</code>
-rows from the <code>emp_data</code> temporary table (created from the WITH subquery) and
-orders the results by the hire date. The <code>emp_data</code> table only exists for the
-duration of the query.</p>
-
-<p><strong>Note:</strong> The <code>employee.json</code> file is included with the Drill installation. It is located in the <code>cp.default</code> workspace which is configured by default. </p>
-<div class="highlight"><pre><code class="language-text" data-lang="text">0: jdbc:drill:zk=local> with emp_data as (select * from cp.`employee.json`) select full_name, position_title, salary, hire_date from emp_data order by hire_date limit 10;
-+------------------+-------------------------+------------+-----------------------+
-| full_name | position_title | salary | hire_date |
-+------------------+-------------------------+------------+-----------------------+
-| Bunny McCown | Store Assistant Manager | 8000.0 | 1993-05-01 00:00:00.0 |
-| Danielle Johnson | Store Assistant Manager | 8000.0 | 1993-05-01 00:00:00.0 |
-| Dick Brummer | Store Assistant Manager | 7900.0 | 1993-05-01 00:00:00.0 |
-| Gregory Whiting | Store Assistant Manager | 10000.0 | 1993-05-01 00:00:00.0 |
-| Juanita Sharp | HQ Human Resources | 6700.0 | 1994-01-01 00:00:00.0 |
-| Sheri Nowmer | President | 80000.0 | 1994-12-01 00:00:00.0 |
-| Rebecca Kanagaki | VP Human Resources | 15000.0 | 1994-12-01 00:00:00.0 |
-| Shauna Wyro | Store Manager | 15000.0 | 1994-12-01 00:00:00.0 |
-| Roberta Damstra | VP Information Systems | 25000.0 | 1994-12-01 00:00:00.0 |
-| Pedro Castillo | VP Country Manager | 35000.0 | 1994-12-01 00:00:00.0 |
-+------------+----------------+--------------+------------------------------------+
-</code></pre></div>
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- <li>Lession 1: Learn about the Data Set</li>
-</nav>
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- <div class="main-content-wrapper">
- <div class="main-content">
-
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- <a class="edit-link" href="https://github.com/apache/drill/blob/gh-pages/_docs/tutorials/learn-drill-with-the-mapr-sandbox/030-lesson-1-learn-about-the-data-set.md" target="_blank"><i class="fa fa-pencil-square-o"></i></a>
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- <h1>Lession 1: Learn about the Data Set</h1>
-
- </div>
-
- <link href="/css/docpage.css" rel="stylesheet" type="text/css">
-
- <div class="int_text" align="left">
-
- <h2 id="goal">Goal</h2>
-
-<p>This lesson is simply about discovering what data is available, in what
-format, using simple SQL SELECT statements. Drill is capable of analyzing data
-without prior knowledge or definition of its schema. This means that you can
-start querying data immediately (and even as it changes), regardless of its
-format.</p>
-
-<p>The data set for the tutorial consists of:</p>
-
-<ul>
-<li>Transactional data: stored as a Hive table</li>
-<li>Product catalog and master customer data: stored as MapR-DB tables</li>
-<li>Clickstream and logs data: stored in the MapR file system as JSON files</li>
-</ul>
-
-<h2 id="queries-in-this-lesson">Queries in This Lesson</h2>
-
-<p>This lesson consists of select * queries on each data source.</p>
-
-<h2 id="before-you-begin">Before You Begin</h2>
-
-<h3 id="start-sqlline">Start SQLLine</h3>
-
-<p>If SQLLine is not already started, use a Terminal or Command window to log
-into the demo VM as root, then enter <code>sqlline</code>, as described in <a href="/docs/getting-to-know-the-drill-sandbox">"Getting to Know the Sandbox"</a>:</p>
-
-<p>You can run queries from the <code>sqlline</code> prompt to complete the tutorial. To exit from
-SQLLine, type:</p>
-<div class="highlight"><pre><code class="language-text" data-lang="text">0: jdbc:drill:> !quit
-</code></pre></div>
-<p>Examples in this tutorial use SQLLine. You can also execute queries using the Drill Web UI.</p>
-
-<h3 id="list-the-available-workspaces-and-databases:">List the available workspaces and databases:</h3>
-<div class="highlight"><pre><code class="language-text" data-lang="text">0: jdbc:drill:> show databases;
-+-------------+
-| SCHEMA_NAME |
-+-------------+
-| hive.default |
-| dfs.default |
-| dfs.logs |
-| dfs.root |
-| dfs.views |
-| dfs.clicks |
-| dfs.tmp |
-| sys |
-| maprdb |
-| cp.default |
-| INFORMATION_SCHEMA |
-+-------------+
-12 rows selected
-</code></pre></div>
-<p>This command exposes all the metadata available from the storage
-plugins configured with Drill as a set of schemas. The Hive and
-MapR-DB databases, file system, and other data are configured in the file system. As
-you run queries in the tutorial, you will switch among these schemas by
-submitting the USE command. This behavior resembles the ability to use
-different database schemas (namespaces) in a relational database system.</p>
-
-<h2 id="query-hive-tables">Query Hive Tables</h2>
-
-<p>The orders table is a six-column Hive table defined in the Hive metastore.
-This is a Hive external table pointing to the data stored in flat files on the
-MapR file system. The orders table contains 122,000 rows.</p>
-
-<h3 id="set-the-schema-to-hive:">Set the schema to hive:</h3>
-<div class="highlight"><pre><code class="language-text" data-lang="text">0: jdbc:drill:> use hive;
-+------------+------------+
-| ok | summary |
-+------------+------------+
-| true | Default schema changed to 'hive' |
-+------------+------------+
-</code></pre></div>
-<p>You will run the USE command throughout this tutorial. The USE command sets
-the schema for the current session.</p>
-
-<h3 id="describe-the-table:">Describe the table:</h3>
-
-<p>You can use the DESCRIBE command to show the columns and data types for a Hive
-table:</p>
-<div class="highlight"><pre><code class="language-text" data-lang="text">0: jdbc:drill:> describe orders;
-+-------------+------------+-------------+
-| COLUMN_NAME | DATA_TYPE | IS_NULLABLE |
-+-------------+------------+-------------+
-| order_id | BIGINT | YES |
-| month | VARCHAR | YES |
-| cust_id | BIGINT | YES |
-| state | VARCHAR | YES |
-| prod_id | BIGINT | YES |
-| order_total | INTEGER | YES |
-+-------------+------------+-------------+
-</code></pre></div>
-<p>The DESCRIBE command returns complete schema information for Hive tables based
-on the metadata available in the Hive metastore.</p>
-
-<h3 id="select-5-rows-from-the-orders-table:">Select 5 rows from the orders table:</h3>
-<div class="highlight"><pre><code class="language-text" data-lang="text">0: jdbc:drill:> select * from orders limit 5;
-+------------+------------+------------+------------+------------+-------------+
-| order_id | month | cust_id | state | prod_id | order_total |
-+------------+------------+------------+------------+------------+-------------+
-| 67212 | June | 10001 | ca | 909 | 13 |
-| 70302 | June | 10004 | ga | 420 | 11 |
-| 69090 | June | 10011 | fl | 44 | 76 |
-| 68834 | June | 10012 | ar | 0 | 81 |
-| 71220 | June | 10018 | az | 411 | 24 |
-+------------+------------+------------+------------+------------+-------------+
-</code></pre></div>
-<p>Because orders is a Hive table, you can query the data in the same way that
-you would query the columns in a relational database table. Note the use of
-the standard LIMIT clause, which limits the result set to the specified number
-of rows. You can use LIMIT with or without an ORDER BY clause.</p>
-
-<p>Drill provides seamless integration with Hive by allowing queries on Hive
-tables defined in the metastore with no extra configuration. Note that Hive is
-not a prerequisite for Drill, but simply serves as a storage plugin or data
-source for Drill. Drill also lets users query all Hive file formats (including
-custom serdes). Additionally, any UDFs defined in Hive can be leveraged as
-part of Drill queries.</p>
-
-<p>Because Drill has its own low-latency SQL query execution engine, you can
-query Hive tables with high performance and support for interactive and ad-hoc
-data exploration.</p>
-
-<h2 id="query-mapr-db-and-hbase-tables">Query MapR-DB and HBase Tables</h2>
-
-<p>The customers and products tables are MapR-DB tables. MapR-DB is an enterprise
-in-Hadoop NoSQL database. It exposes the HBase API to support application
-development. Every MapR-DB table has a row_key, in addition to one or more
-column families. Each column family contains one or more specific columns. The
-row_key value is a primary key that uniquely identifies each row.</p>
-
-<p>Drill allows direct queries on MapR-DB and HBase tables. Unlike other SQL on
-Hadoop options, Drill requires no overlay schema definitions in Hive to work
-with this data. Think about a MapR-DB or HBase table with thousands of
-columns, such as a time-series database, and the pain of having to manage
-duplicate schemas for it in Hive!</p>
-
-<h3 id="products-table">Products Table</h3>
-
-<p>The products table has two column families.</p>
-
-<table ><colgroup><col /><col /></colgroup><tbody><tr><td ><span style="color: rgb(0,0,0);">Column Family</span></td><td ><span style="color: rgb(0,0,0);">Columns</span></td></tr><tr><td ><span style="color: rgb(0,0,0);">details</span></td><td ><span style="color: rgb(0,0,0);">name</br></span><span style="color: rgb(0,0,0);">category</span></td></tr><tr><td ><span style="color: rgb(0,0,0);">pricing</span></td><td ><span style="color: rgb(0,0,0);">price</span></td></tr></tbody></table>
-
-<p>The products table contains 965 rows.</p>
-
-<h3 id="customers-table">Customers Table</h3>
-
-<p>The Customers table has three column families.</p>
-
-<table ><colgroup><col /><col /></colgroup><tbody><tr><td ><span style="color: rgb(0,0,0);">Column Family</span></td><td ><span style="color: rgb(0,0,0);">Columns</span></td></tr><tr><td ><span style="color: rgb(0,0,0);">address</span></td><td ><span style="color: rgb(0,0,0);">state</span></td></tr><tr><td ><span style="color: rgb(0,0,0);">loyalty</span></td><td ><span style="color: rgb(0,0,0);">agg_rev</br></span><span style="color: rgb(0,0,0);">membership</span></td></tr><tr><td ><span style="color: rgb(0,0,0);">personal</span></td><td ><span style="color: rgb(0,0,0);">age</br></span><span style="color: rgb(0,0,0);">gender</span></td></tr></tbody></table>
-
-
-<p>The customers table contains 993 rows.</p>
-
-<h3 id="set-the-workspace-to-maprdb:">Set the workspace to maprdb:</h3>
-<div class="highlight"><pre><code class="language-text" data-lang="text">0: jdbc:drill:> use maprdb;
-+------------+------------+
-| ok | summary |
-+------------+------------+
-| true | Default schema changed to 'maprdb' |
-+------------+------------+
-</code></pre></div>
-<h3 id="describe-the-tables:">Describe the tables:</h3>
-<div class="highlight"><pre><code class="language-text" data-lang="text">0: jdbc:drill:> describe customers;
-+-------------+------------+-------------+
-| COLUMN_NAME | DATA_TYPE | IS_NULLABLE |
-+-------------+------------+-------------+
-| row_key | ANY | NO |
-| address | (VARCHAR(1), ANY) MAP | NO |
-| loyalty | (VARCHAR(1), ANY) MAP | NO |
-| personal | (VARCHAR(1), ANY) MAP | NO |
-+-------------+------------+-------------+
-
-0: jdbc:drill:> describe products;
-+-------------+------------+-------------+
-| COLUMN_NAME | DATA_TYPE | IS_NULLABLE |
-+-------------+------------+-------------+
-| row_key | ANY | NO |
-| details | (VARCHAR(1), ANY) MAP | NO |
-| pricing | (VARCHAR(1), ANY) MAP | NO |
-+-------------+------------+-------------+
-</code></pre></div>
-<p>Unlike the Hive example, the DESCRIBE command does not return the full schema
-up to the column level. Wide-column NoSQL databases such as MapR-DB and HBase
-can be schema-less by design; every row has its own set of column name-value
-pairs in a given column family, and the column value can be of any data type,
-as determined by the application inserting the data.</p>
-
-<p>A \u201cMAP\u201d complex type in Drill represents this variable column name-value
-structure, and \u201cANY\u201d represents the fact that the column value can be of any
-data type. Observe the row_key, which is also simply bytes and has the type
-ANY.</p>
-
-<h3 id="select-5-rows-from-the-products-table:">Select 5 rows from the products table:</h3>
-<div class="highlight"><pre><code class="language-text" data-lang="text">0: jdbc:drill:> select * from products limit 5;
-+------------+------------+------------+
-| row_key | details | pricing |
-+------------+------------+------------+
-| [B@a1a3e25 | {"category":"bGFwdG9w","name":"IlNvbnkgbm90ZWJvb2si"} | {"price":"OTU5"} |
-| [B@103a43af | {"category":"RW52ZWxvcGVz","name":"IzEwLTQgMS84IHggOSAxLzIgUHJlbWl1bSBEaWFnb25hbCBTZWFtIEVudmVsb3Blcw=="} | {"price":"MT |
-| [B@61319e7b | {"category":"U3RvcmFnZSAmIE9yZ2FuaXphdGlvbg==","name":"MjQgQ2FwYWNpdHkgTWF4aSBEYXRhIEJpbmRlciBSYWNrc1BlYXJs"} | {"price" |
-| [B@9bcf17 | {"category":"TGFiZWxz","name":"QXZlcnkgNDk4"} | {"price":"Mw=="} |
-| [B@7538ef50 | {"category":"TGFiZWxz","name":"QXZlcnkgNDk="} | {"price":"Mw=="} |
-</code></pre></div>
-<p>Given that Drill requires no up front schema definitions indicating data
-types, the query returns the raw byte arrays for column values, just as they
-are stored in MapR-DB (or HBase). Observe that the column families (details
-and pricing) have the map data type and appear as JSON strings.</p>
-
-<p>In Lesson 2, you will use CAST functions to return typed data for each column.</p>
-
-<h3 id="select-5-rows-from-the-customers-table:">Select 5 rows from the customers table:</h3>
-<div class="highlight"><pre><code class="language-text" data-lang="text">+0: jdbc:drill:> select * from customers limit 5;
-+------------+------------+------------+------------+
-| row_key | address | loyalty | personal |
-+------------+------------+------------+------------+
-| [B@284bae62 | {"state":"Imt5Ig=="} | {"agg_rev":"IjEwMDEtMzAwMCI=","membership":"ImJhc2ljIg=="} | {"age":"IjI2LTM1Ig==","gender":"Ik1B |
-| [B@7ffa4523 | {"state":"ImNhIg=="} | {"agg_rev":"IjAtMTAwIg==","membership":"ImdvbGQi"} | {"age":"IjI2LTM1Ig==","gender":"IkZFTUFMRSI= |
-| [B@7d13e79 | {"state":"Im9rIg=="} | {"agg_rev":"IjUwMS0xMDAwIg==","membership":"InNpbHZlciI="} | {"age":"IjI2LTM1Ig==","gender":"IkZFT |
-| [B@3a5c7df1 | {"state":"ImtzIg=="} | {"agg_rev":"IjMwMDEtMTAwMDAwIg==","membership":"ImdvbGQi"} | {"age":"IjUxLTEwMCI=","gender":"IkZF |
-| [B@e507726 | {"state":"Im5qIg=="} | {"agg_rev":"IjAtMTAwIg==","membership":"ImJhc2ljIg=="} | {"age":"IjIxLTI1Ig==","gender":"Ik1BTEUi" |
-+------------+------------+------------+------------+
-</code></pre></div>
-<p>Again the table returns byte data that needs to be cast to readable data
-types.</p>
-
-<h2 id="query-the-file-system">Query the File System</h2>
-
-<p>Along with querying a data source with full schemas (such as Hive) and partial
-schemas (such as MapR-DB and HBase), Drill offers the unique capability to
-perform SQL queries directly on file system. The file system could be a local
-file system, or a distributed file system such as MapR-FS, HDFS, or S3.</p>
-
-<p>In the context of Drill, a file or a directory is considered as synonymous to
-a relational database \u201ctable.\u201d Therefore, you can perform SQL operations
-directly on files and directories without the need for up-front schema
-definitions or schema management for any model changes. The schema is
-discovered on the fly based on the query. Drill supports queries on a variety
-of file formats including text, CSV, Parquet, and JSON.</p>
-
-<p>In this example, the clickstream data coming from the mobile/web applications
-is in JSON format. The JSON files have the following structure:</p>
-<div class="highlight"><pre><code class="language-text" data-lang="text">{"trans_id":31920,"date":"2014-04-26","time":"12:17:12","user_info":{"cust_id":22526,"device":"IOS5","state":"il"},"trans_info":{"prod_id":[174,2],"purch_flag":"false"}}
-{"trans_id":31026,"date":"2014-04-20","time":"13:50:29","user_info":{"cust_id":16368,"device":"AOS4.2","state":"nc"},"trans_info":{"prod_id":[],"purch_flag":"false"}}
-{"trans_id":33848,"date":"2014-04-10","time":"04:44:42","user_info":{"cust_id":21449,"device":"IOS6","state":"oh"},"trans_info":{"prod_id":[582],"purch_flag":"false"}}
-</code></pre></div>
-<p>The clicks.json and clicks.campaign.json files contain metadata as part of the
-data itself (referred to as \u201cself-describing\u201d data). Also note that the data
-elements are complex, or nested. The initial queries below do not show how to
-unpack the nested data, but they show that easy access to the data requires no
-setup beyond the definition of a workspace.</p>
-
-<h3 id="query-nested-clickstream-data">Query nested clickstream data</h3>
-
-<h4 id="set-the-workspace-to-dfs.clicks:">Set the workspace to dfs.clicks:</h4>
-<div class="highlight"><pre><code class="language-text" data-lang="text"> 0: jdbc:drill:> use dfs.clicks;
-+------------+------------+
-| ok | summary |
-+------------+------------+
-| true | Default schema changed to 'dfs.clicks' |
-+------------+------------+
-</code></pre></div>
-<p>In this case, setting the workspace is a mechanism for making queries easier
-to write. When you specify a file system workspace, you can shorten references
-to files in your queries. Instead of having to provide the
-complete path to a file, you can provide the path relative to a directory
-location specified in the workspace. For example:</p>
-<div class="highlight"><pre><code class="language-text" data-lang="text">"location": "/mapr/demo.mapr.com/data/nested"
-</code></pre></div>
-<p>Any file or directory that you want to query in this path can be referenced
-relative to this path. The clicks directory referred to in the following query
-is directly below the nested directory.</p>
-
-<h4 id="select-2-rows-from-the-clicks.json-file:">Select 2 rows from the clicks.json file:</h4>
-<div class="highlight"><pre><code class="language-text" data-lang="text">0: jdbc:drill:> select * from `clicks/clicks.json` limit 2;
-+------------+------------+------------+------------+------------+
-| trans_id | date | time | user_info | trans_info |
-+------------+------------+------------+------------+------------+
-| 31920 | 2014-04-26 | 12:17:12 | {"cust_id":22526,"device":"IOS5","state":"il"} | {"prod_id":[174,2],"purch_flag":"false"} |
-| 31026 | 2014-04-20 | 13:50:29 | {"cust_id":16368,"device":"AOS4.2","state":"nc"} | {"prod_id":[],"purch_flag":"false"} |
-+------------+------------+------------+------------+------------+
-2 rows selected
-</code></pre></div>
-<p>Note that the FROM clause reference points to a specific file. Drill expands
-the traditional concept of a \u201ctable reference\u201d in a standard SQL FROM clause
-to refer to a file in a local or distributed file system.</p>
-
-<p>The only special requirement is the use of back ticks to enclose the file
-path. This is necessary whenever the file path contains Drill reserved words
-or characters.</p>
-
-<h4 id="select-2-rows-from-the-campaign.json-file:">Select 2 rows from the campaign.json file:</h4>
-<div class="highlight"><pre><code class="language-text" data-lang="text">0: jdbc:drill:> select * from `clicks/clicks.campaign.json` limit 2;
-+------------+------------+------------+------------+------------+------------+
-| trans_id | date | time | user_info | ad_info | trans_info |
-+------------+------------+------------+------------+------------+------------+
-| 35232 | 2014-05-10 | 00:13:03 | {"cust_id":18520,"device":"AOS4.3","state":"tx"} | {"camp_id":"null"} | {"prod_id":[7,7],"purch_flag":"true"} |
-| 31995 | 2014-05-22 | 16:06:38 | {"cust_id":17182,"device":"IOS6","state":"fl"} | {"camp_id":"null"} | {"prod_id":[],"purch_flag":"false"} |
-+------------+------------+------------+------------+------------+------------+
-2 rows selected
-</code></pre></div>
-<p>Notice that with a select * query, any complex data types such as maps and
-arrays return as JSON strings. You will see how to unpack this data using
-various SQL functions and operators in the next lesson.</p>
-
-<h2 id="query-logs-data">Query Logs Data</h2>
-
-<p>Unlike the previous example where we performed queries against clicks data in
-one file, logs data is stored as partitioned directories on the file system.
-The logs directory has three subdirectories:</p>
-
-<ul>
-<li>2012</li>
-<li>2013</li>
-<li>2014</li>
-</ul>
-
-<p>Each of these year directories fans out to a set of numbered month
-directories, and each month directory contains a JSON file with log records
-for that month. The total number of records in all log files is 48000.</p>
-
-<p>The files in the logs directory and its subdirectories are JSON files. There
-are many of these files, but you can use Drill to query them all as a single
-data source, or to query a subset of the files.</p>
-
-<h4 id="set-the-workspace-to-dfs.logs:">Set the workspace to dfs.logs:</h4>
-<div class="highlight"><pre><code class="language-text" data-lang="text"> 0: jdbc:drill:> use dfs.logs;
-+------------+------------+
-| ok | summary |
-+------------+------------+
-| true | Default schema changed to 'dfs.logs' |
-+------------+------------+
-</code></pre></div>
-<h4 id="select-2-rows-from-the-logs-directory:">Select 2 rows from the logs directory:</h4>
-<div class="highlight"><pre><code class="language-text" data-lang="text">0: jdbc:drill:> select * from logs limit 2;
-+------------+------------+------------+------------+------------+------------+------------+------------+------------+------------+------------+----------+
-| dir0 | dir1 | trans_id | date | time | cust_id | device | state | camp_id | keywords | prod_id | purch_fl |
-+------------+------------+------------+------------+------------+------------+------------+------------+------------+------------+------------+----------+
-| 2014 | 8 | 24181 | 08/02/2014 | 09:23:52 | 0 | IOS5 | il | 2 | wait | 128 | false |
-| 2014 | 8 | 24195 | 08/02/2014 | 07:58:19 | 243 | IOS5 | mo | 6 | hmm | 107 | false |
-+------------+------------+------------+------------+------------+------------+------------+------------+------------+------------+------------+----------+
-</code></pre></div>
-<p>Note that this is flat JSON data. The dfs.clicks workspace location property
-points to a directory that contains the logs directory, making the FROM clause
-reference for this query very simple. You do not have to refer to the complete
-directory path on the file system.</p>
-
-<p>The column names dir0 and dir1 are special Drill variables that identify
-subdirectories below the logs directory. In Lesson 3, you will do more complex
-queries that leverage these dynamic variables.</p>
-
-<h4 id="find-the-total-number-of-rows-in-the-logs-directory-(all-files):">Find the total number of rows in the logs directory (all files):</h4>
-<div class="highlight"><pre><code class="language-text" data-lang="text">0: jdbc:drill:> select count(*) from logs;
-+------------+
-| EXPR$0 |
-+------------+
-| 48000 |
-+------------+
-</code></pre></div>
-<p>This query traverses all of the files in the logs directory and its
-subdirectories to return the total number of rows in those files.</p>
-
-<h1 id="what's-next">What's Next</h1>
-
-<p>Go to <a href="/docs/lession-2-run-queries-with-ansi-sql">Lesson 2: Run Queries with ANSI
-SQL</a>.</p>
-
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-
- <li class="toctree-l2"><a href="javascript: void(0);">Installing Drill in Distributed Mode</a></li>
- <ul style="display: none">
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- <li class="toctree-l3"><a class="reference internal" href="/docs/distributed-mode-prerequisites/">Distributed Mode Prerequisites</a></li>
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- <li class="toctree-l3"><a class="reference internal" href="/docs/installing-drill-on-the-cluster/">Installing Drill on the Cluster</a></li>
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- <li class="toctree-l3"><a class="reference internal" href="/docs/starting-drill-in-distributed-mode/">Starting Drill in Distributed Mode</a></li>
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- </ul>
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- <li class="toctree-l2"><a class="reference internal" href="/docs/starting-the-web-console/">Starting the Web Console</a></li>
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- </ul>
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- <li class="toctree-l1"><a href="javascript: void(0);">Configure Drill</a></li>
- <ul style="display: none">
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- <li class="toctree-l2"><a class="reference internal" href="/docs/configure-drill-introduction/">Configure Drill Introduction</a></li>
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- <li class="toctree-l2"><a class="reference internal" href="/docs/configuring-drill-memory/">Configuring Drill Memory</a></li>
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- <li class="toctree-l2"><a href="javascript: void(0);">Configuring a Multitenant Cluster</a></li>
- <ul style="display: none">
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- <li class="toctree-l3"><a class="reference internal" href="/docs/configuring-a-multitenant-cluster-introduction/">Configuring a Multitenant Cluster Introduction</a></li>
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- <li class="toctree-l3"><a class="reference internal" href="/docs/configuring-multitenant-resources/">Configuring Multitenant Resources</a></li>
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- <li class="toctree-l3"><a class="reference internal" href="/docs/configuring-resources-for-a-shared-drillbit/">Configuring Resources for a Shared Drillbit</a></li>
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- </ul>
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- <li class="toctree-l2"><a class="reference internal" href="/docs/configuring-user-impersonation/">Configuring User Impersonation</a></li>
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- <li class="toctree-l2"><a class="reference internal" href="/docs/configuring-inbound-impersonation/">Configuring Inbound Impersonation</a></li>
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- <li class="toctree-l2"><a class="reference internal" href="/docs/configuring-user-authentication/">Configuring User Authentication</a></li>
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- <li class="toctree-l2"><a class="reference internal" href="/docs/configuring-user-impersonation-with-hive-authorization/">Configuring User Impersonation with Hive Authorization</a></li>
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- <li class="toctree-l2"><a class="reference internal" href="/docs/configuring-web-console-and-rest-api-security/">Configuring Web Console and REST API Security</a></li>
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- <li class="toctree-l2"><a href="javascript: void(0);">Configuration Options</a></li>
- <ul style="display: none">
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- <li class="toctree-l3"><a class="reference internal" href="/docs/configuration-options-introduction/">Configuration Options Introduction</a></li>
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- <li class="toctree-l3"><a class="reference internal" href="/docs/start-up-options/">Start-Up Options</a></li>
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- <li class="toctree-l3"><a class="reference internal" href="/docs/planning-and-execution-options/">Planning and Execution Options</a></li>
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- <li class="toctree-l3"><a class="reference internal" href="/docs/persistent-configuration-storage/">Persistent Configuration Storage</a></li>
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- </ul>
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- <li class="toctree-l2"><a class="reference internal" href="/docs/ports-used-by-drill/">Ports Used by Drill</a></li>
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- <li class="toctree-l2"><a class="reference internal" href="/docs/configuring-the-drill-shell/">Configuring the Drill Shell</a></li>
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- </ul>
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- <li class="toctree-l1"><a href="javascript: void(0);">Connect a Data Source</a></li>
- <ul style="display: none">
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- <li class="toctree-l2"><a class="reference internal" href="/docs/connect-a-data-source-introduction/">Connect a Data Source Introduction</a></li>
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- <li class="toctree-l2"><a class="reference internal" href="/docs/storage-plugin-registration/">Storage Plugin Registration</a></li>
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- <li class="toctree-l2"><a href="javascript: void(0);">Storage Plugin Configuration</a></li>
- <ul style="display: none">
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- <li class="toctree-l3"><a class="reference internal" href="/docs/plugin-configuration-basics/">Plugin Configuration Basics</a></li>
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- <li class="toctree-l3"><a class="reference internal" href="/docs/workspaces/">Workspaces</a></li>
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- <li class="toctree-l3"><a class="reference internal" href="/docs/drill-default-input-format/">Drill Default Input Format</a></li>
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- </ul>
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- <li class="toctree-l2"><a class="reference internal" href="/docs/file-system-storage-plugin/">File System Storage Plugin</a></li>
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- <li class="toctree-l2"><a class="reference internal" href="/docs/hbase-storage-plugin/">HBase Storage Plugin</a></li>
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- <li class="toctree-l2"><a class="reference internal" href="/docs/hive-storage-plugin/">Hive Storage Plugin</a></li>
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- <li class="toctree-l2"><a class="reference internal" href="/docs/rdbms-storage-plugin/">RDBMS Storage Plugin</a></li>
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- <li class="toctree-l2"><a class="reference internal" href="/docs/mongodb-storage-plugin/">MongoDB Storage Plugin</a></li>
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- <li class="toctree-l2"><a class="reference internal" href="/docs/mapr-db-format/">MapR-DB Format</a></li>
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- <li class="toctree-l2"><a class="reference internal" href="/docs/s3-storage-plugin/">S3 Storage Plugin</a></li>
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- </ul>
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- <li class="toctree-l1"><a href="javascript: void(0);">ODBC/JDBC Interfaces</a></li>
- <ul style="display: none">
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- <li class="toctree-l2"><a class="reference internal" href="/docs/interfaces-introduction/">Interfaces Introduction</a></li>
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- <li class="toctree-l2"><a class="reference internal" href="/docs/using-the-jdbc-driver/">Using the JDBC Driver</a></li>
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- <li class="toctree-l2"><a class="reference internal" href="/docs/using-jdbc-with-squirrel-on-windows/">Using JDBC with SQuirreL on Windows</a></li>
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- <li class="toctree-l2"><a href="javascript: void(0);">Installing the ODBC Driver</a></li>
- <ul style="display: none">
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- <li class="toctree-l3"><a class="reference internal" href="/docs/installing-the-driver-on-linux/">Installing the Driver on Linux</a></li>
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- <li class="toctree-l3"><a class="reference internal" href="/docs/installing-the-driver-on-mac-os-x/">Installing the Driver on Mac OS X</a></li>
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- <li class="toctree-l3"><a class="reference internal" href="/docs/installing-the-driver-on-windows/">Installing the Driver on Windows</a></li>
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- <li class="toctree-l3"><a class="reference internal" href="/docs/installing-the-tdc-file-on-windows/">Installing the TDC File on Windows</a></li>
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- </ul>
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- <li class="toctree-l2"><a href="javascript: void(0);">Configuring ODBC</a></li>
- <ul style="display: none">
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- <li class="toctree-l3"><a class="reference internal" href="/docs/odbc-configuration-reference/">ODBC Configuration Reference</a></li>
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- <li class="toctree-l3"><a class="reference internal" href="/docs/configuring-odbc-on-linux/">Configuring ODBC on Linux</a></li>
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- <li class="toctree-l3"><a class="reference internal" href="/docs/configuring-odbc-on-mac-os-x/">Configuring ODBC on Mac OS X</a></li>
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- <li class="toctree-l3"><a class="reference internal" href="/docs/configuring-odbc-on-windows/">Configuring ODBC on Windows</a></li>
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- <li class="toctree-l3"><a class="reference internal" href="/docs/testing-the-odbc-connection/">Testing the ODBC Connection</a></li>
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- </ul>
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- <li class="toctree-l2"><a href="javascript: void(0);">Using Drill Explorer</a></li>
- <ul style="display: none">
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- <li class="toctree-l3"><a class="reference internal" href="/docs/drill-explorer-introduction/">Drill Explorer Introduction</a></li>
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- <li class="toctree-l3"><a class="reference internal" href="/docs/connecting-drill-explorer-to-data/">Connecting Drill Explorer to Data</a></li>
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- <li class="toctree-l3"><a class="reference internal" href="/docs/browsing-data-and-defining-views/">Browsing Data and Defining Views</a></li>
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- </ul>
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- <li class="toctree-l2"><a href="javascript: void(0);">Using Drill with BI Tools</a></li>
- <ul style="display: none">
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- <li class="toctree-l3"><a class="reference internal" href="/docs/using-drill-with-bi-tools-introduction/">Using Drill with BI Tools Introduction</a></li>
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- <li class="toctree-l3"><a class="reference internal" href="/docs/tableau-examples/">Tableau Examples</a></li>
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- <li class="toctree-l3"><a class="reference internal" href="/docs/using-microstrategy-analytics-with-apache-drill/">Using MicroStrategy Analytics with Apache Drill</a></li>
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- <li class="toctree-l3"><a class="reference internal" href="/docs/using-tibco-spotfire-desktop-with-drill/">Using Tibco Spotfire Desktop with Drill</a></li>
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- <li class="toctree-l3"><a class="reference internal" href="/docs/configuring-tibco-spotfire-server-with-drill/">Configuring Tibco Spotfire Server with Drill</a></li>
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- <li class="toctree-l3"><a class="reference internal" href="/docs/using-qlik-sense-with-drill/">Using Qlik Sense with Drill</a></li>
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- <li class="toctree-l3"><a class="reference internal" href="/docs/using-apache-drill-with-tableau-9-desktop/">Using Apache Drill with Tableau 9 Desktop</a></li>
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- <li class="toctree-l3"><a class="reference internal" href="/docs/using-apache-drill-with-tableau-9-server/">Using Apache Drill with Tableau 9 Server</a></li>
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- <li class="toctree-l3"><a class="reference internal" href="/docs/using-information-builders-webfocus-with-apache-drill/">Using Information Builders\u2019 WebFOCUS with Apache Drill</a></li>
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- <li class="toctree-l3"><a class="reference internal" href="/docs/configuring-jreport-with-drill/">Configuring JReport with Drill</a></li>
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- </ul>
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-
- </ul>
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- <li class="toctree-l1"><a href="javascript: void(0);">Query Data</a></li>
- <ul style="display: none">
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- <li class="toctree-l2"><a class="reference internal" href="/docs/query-data-introduction/">Query Data Introduction</a></li>
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- <li class="toctree-l2"><a href="javascript: void(0);">Querying a File System</a></li>
- <ul style="display: none">
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- <li class="toctree-l3"><a class="reference internal" href="/docs/querying-a-file-system-introduction/">Querying a File System Introduction</a></li>
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- <li class="toctree-l3"><a class="reference internal" href="/docs/querying-avro-files/">Querying Avro Files</a></li>
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- <li class="toctree-l3"><a class="reference internal" href="/docs/querying-json-files/">Querying JSON Files</a></li>
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- <li class="toctree-l3"><a class="reference internal" href="/docs/querying-parquet-files/">Querying Parquet Files</a></li>
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- <li class="toctree-l3"><a class="reference internal" href="/docs/querying-plain-text-files/">Querying Plain Text Files</a></li>
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- <li class="toctree-l3"><a class="reference internal" href="/docs/querying-directories/">Querying Directories</a></li>
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- <li class="toctree-l3"><a class="reference internal" href="/docs/querying-sequence-files/">Querying Sequence Files</a></li>
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- </ul>
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- <li class="toctree-l2"><a class="reference internal" href="/docs/querying-hbase/">Querying HBase</a></li>
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- <li class="toctree-l2"><a href="javascript: void(0);">Querying Complex Data</a></li>
- <ul style="display: none">
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- <li class="toctree-l3"><a class="reference internal" href="/docs/querying-complex-data-introduction/">Querying Complex Data Introduction</a></li>
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- <li class="toctree-l3"><a class="reference internal" href="/docs/sample-data-donuts/">Sample Data: Donuts</a></li>
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- <li class="toctree-l3"><a class="reference internal" href="/docs/selecting-flat-data/">Selecting Flat Data</a></li>
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- <li class="toctree-l3"><a class="reference internal" href="/docs/using-sql-functions-clauses-and-joins/">Using SQL Functions, Clauses, and Joins</a></li>
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- <li class="toctree-l3"><a class="reference internal" href="/docs/selecting-nested-data-for-a-column/">Selecting Nested Data for a Column</a></li>
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- <li class="toctree-l3"><a class="reference internal" href="/docs/selecting-multiple-columns-within-nested-data/">Selecting Multiple Columns Within Nested Data</a></li>
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- </ul>
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- <li class="toctree-l2"><a class="reference internal" href="/docs/querying-hive/">Querying Hive</a></li>
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- <li class="toctree-l2"><a class="reference internal" href="/docs/querying-the-information-schema/">Querying the INFORMATION SCHEMA</a></li>
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- <li class="toctree-l2"><a class="reference internal" href="/docs/querying-system-tables/">Querying System Tables</a></li>
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- <li class="toctree-l2"><a class="reference internal" href="/docs/monitoring-and-canceling-queries-in-the-drill-web-console/">Monitoring and Canceling Queries in the Drill Web Console</a></li>
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- </ul>
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- <li class="toctree-l1"><a href="javascript: void(0);">Performance Tuning</a></li>
- <ul style="display: none">
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- <li class="toctree-l2"><a class="reference internal" href="/docs/performance-tuning-introduction/">Performance Tuning Introduction</a></li>
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- <li class="toctree-l2"><a href="javascript: void(0);">Partition Pruning</a></li>
- <ul style="display: none">
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- <li class="toctree-l3"><a class="reference internal" href="/docs/partition-pruning-introduction/">Partition Pruning Introduction</a></li>
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- <li class="toctree-l3"><a class="reference internal" href="/docs/how-to-partition-data/">How to Partition Data</a></li>
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- </ul>
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- <li class="toctree-l2"><a class="reference internal" href="/docs/optimizing-parquet-metadata-reading/">Optimizing Parquet Metadata Reading</a></li>
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- <li class="toctree-l2"><a class="reference internal" href="/docs/hive-metadata-caching/">Hive Metadata Caching</a></li>
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- <li class="toctree-l2"><a class="reference internal" href="/docs/choosing-a-storage-format/">Choosing a Storage Format</a></li>
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- <li class="toctree-l2"><a href="javascript: void(0);">Query Plans and Tuning</a></li>
- <ul style="display: none">
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- <li class="toctree-l3"><a class="reference internal" href="/docs/query-plans-and-tuning-introduction/">Query Plans and Tuning Introduction</a></li>
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- <li class="toctree-l3"><a class="reference internal" href="/docs/join-planning-guidelines/">Join Planning Guidelines</a></li>
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- <li class="toctree-l3"><a class="reference internal" href="/docs/guidelines-for-optimizing-aggregation/">Guidelines for Optimizing Aggregation</a></li>
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- <li class="toctree-l3"><a class="reference internal" href="/docs/modifying-query-planning-options/">Modifying Query Planning Options</a></li>
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- <li class="toctree-l3"><a class="reference internal" href="/docs/sort-based-and-hash-based-memory-constrained-operators/">Sort-Based and Hash-Based Memory-Constrained Operators</a></li>
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- <li class="toctree-l3"><a class="reference internal" href="/docs/enabling-query-queuing/">Enabling Query Queuing</a></li>
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- <li class="toctree-l3"><a class="reference internal" href="/docs/controlling-parallelization-to-balance-performance-with-multi-tenancy/">Controlling Parallelization to Balance Performance with Multi-Tenancy</a></li>
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- </ul>
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- <li class="toctree-l2"><a href="javascript: void(0);">Identifying Performance Issues</a></li>
- <ul style="display: none">
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- <li class="toctree-l3"><a class="reference internal" href="/docs/query-plans/">Query Plans</a></li>
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- <li class="toctree-l3"><a class="reference internal" href="/docs/query-profiles/">Query Profiles</a></li>
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- </ul>
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- <li class="toctree-l2"><a href="javascript: void(0);">Performance Tuning Reference</a></li>
- <ul style="display: none">
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- <li class="toctree-l3"><a class="reference internal" href="/docs/query-profile-column-descriptions/">Query Profile Column Descriptions</a></li>
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- <li class="toctree-l3"><a class="reference internal" href="/docs/physical-operators/">Physical Operators</a></li>
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- </ul>
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- </ul>
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- <li class="toctree-l1"><a href="javascript: void(0);">Log and Debug</a></li>
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- <li class="toctree-l2"><a class="reference internal" href="/docs/log-and-debug-introduction/">Log and Debug Introduction</a></li>
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- <li class="toctree-l2"><a class="reference internal" href="/docs/error-messages/">Error Messages</a></li>
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- <li class="toctree-l2"><a class="reference internal" href="/docs/modify-logback-xml/">Modify logback.xml</a></li>
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- <li class="toctree-l2"><a class="reference internal" href="/docs/review-the-java-stack-trace/">Review the Java Stack Trace</a></li>
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- <li class="toctree-l2"><a class="reference internal" href="/docs/query-audit-logging/">Query Audit Logging</a></li>
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- </ul>
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- <li class="toctree-l1"><a href="javascript: void(0);">SQL Reference</a></li>
- <ul style="display: none">
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- <li class="toctree-l2"><a class="reference internal" href="/docs/sql-reference-introduction/">SQL Reference Introduction</a></li>
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- <ul style="display: none">
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- <li class="toctree-l3"><a class="reference internal" href="/docs/supported-data-types/">Supported Data Types</a></li>
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- <li class="toctree-l3"><a class="reference internal" href="/docs/date-time-and-timestamp/">Date, Time, and Timestamp</a></li>
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- <li class="toctree-l3"><a class="reference internal" href="/docs/handling-different-data-types/">Handling Different Data Types</a></li>
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- </ul>
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- <li class="toctree-l2"><a class="reference internal" href="/docs/lexical-structure/">Lexical Structure</a></li>
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- <li class="toctree-l2"><a class="reference internal" href="/docs/operators/">Operators</a></li>
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- <li class="toctree-l2"><a href="javascript: void(0);">SQL Functions</a></li>
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- <li class="toctree-l3"><a class="reference internal" href="/docs/about-sql-function-examples/">About SQL Function Examples</a></li>
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- <li class="toctree-l3"><a class="reference internal" href="/docs/math-and-trig/">Math and Trig</a></li>
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- <li class="toctree-l3"><a class="reference internal" href="/docs/data-type-conversion/">Data Type Conversion</a></li>
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- <li class="toctree-l3"><a class="reference internal" href="/docs/date-time-functions-and-arithmetic/">Date/Time Functions and Arithmetic</a></li>
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- <li class="toctree-l3"><a class="reference internal" href="/docs/string-manipulation/">String Manipulation</a></li>
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- <li class="toctree-l3"><a class="reference internal" href="/docs/aggregate-and-aggregate-statistical/">Aggregate and Aggregate Statistical</a></li>
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- <li class="toctree-l3"><a class="reference internal" href="/docs/functions-for-handling-nulls/">Functions for Handling Nulls</a></li>
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- </ul>
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- <li class="toctree-l2"><a href="javascript: void(0);">SQL Window Functions</a></li>
- <ul style="display: none">
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- <li class="toctree-l3"><a class="reference internal" href="/docs/sql-window-functions-introduction/">SQL Window Functions Introduction</a></li>
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- <li class="toctree-l3"><a class="reference internal" href="/docs/aggregate-window-functions/">Aggregate Window Functions</a></li>
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- <li class="toctree-l3"><a class="reference internal" href="/docs/ranking-window-functions/">Ranking Window Functions</a></li>
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- <li class="toctree-l3"><a class="reference internal" href="/docs/value-window-functions/">Value Window Functions</a></li>
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- <li class="toctree-l3"><a class="reference internal" href="/docs/sql-window-functions-examples/">SQL Window Functions Examples</a></li>
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- </ul>
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- <li class="toctree-l2"><a href="javascript: void(0);">Nested Data Functions</a></li>
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- <li class="toctree-l3"><a class="reference internal" href="/docs/nested-data-limitations/">Nested Data Limitations</a></li>
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- <li class="toctree-l3"><a class="reference internal" href="/docs/flatten/">FLATTEN</a></li>
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- <li class="toctree-l3"><a class="reference internal" href="/docs/kvgen/">KVGEN</a></li>
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- <li class="toctree-l3"><a class="reference internal" href="/docs/repeated-count/">REPEATED_COUNT</a></li>
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- <li class="toctree-l3"><a class="reference internal" href="/docs/repeated-contains/">REPEATED_CONTAINS</a></li>
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- </ul>
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- <li class="toctree-l2"><a class="reference internal" href="/docs/query-directory-functions/">Query Directory Functions</a></li>
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- <li class="toctree-l2"><a href="javascript: void(0);">SQL Commands</a></li>
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- <li class="toctree-l3"><a class="reference internal" href="/docs/supported-sql-commands/">Supported SQL Commands</a></li>
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- <li class="toctree-l3"><a class="reference internal" href="/docs/set/">SET</a></li>
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- <li class="toctree-l3"><a class="reference internal" href="/docs/reset/">RESET</a></li>
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- <li class="toctree-l3"><a class="reference internal" href="/docs/alter-system/">ALTER SYSTEM</a></li>
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- <li class="toctree-l3"><a class="reference internal" href="/docs/create-table-as-ctas/">CREATE TABLE AS (CTAS)</a></li>
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- <li class="toctree-l3"><a class="reference internal" href="/docs/partition-by-clause/">PARTITION BY Clause</a></li>
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- <li class="toctree-l3"><a class="reference internal" href="/docs/create-view/">CREATE VIEW</a></li>
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- <li class="toctree-l3"><a class="reference internal" href="/docs/describe/">DESCRIBE</a></li>
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- <li class="toctree-l3"><a class="reference internal" href="/docs/drop-table/">DROP TABLE</a></li>
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- <li class="toctree-l3"><a class="reference internal" href="/docs/drop-view/">DROP VIEW</a></li>
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- <li class="toctree-l3"><a class="reference internal" href="/docs/explain/">EXPLAIN</a></li>
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- <li class="toctree-l3"><a class="reference internal" href="/docs/select/">SELECT</a></li>
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- <li class="toctree-l3"><a class="reference internal" href="/docs/select-list/">SELECT List</a></li>
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- <li class="toctree-l3"><a class="reference internal" href="/docs/from-clause/">FROM Clause</a></li>
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- <li class="toctree-l3"><a class="reference internal" href="/docs/group-by-clause/">GROUP BY Clause</a></li>
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- <li class="toctree-l3"><a class="reference internal" href="/docs/having-clause/">HAVING Clause</a></li>
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- <h1>Drill Patch Review Tool</h1>
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- <div class="int_text" align="left">
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- <ul>
-<li>Drill JIRA and Reviewboard script
-
-<ul>
-<li>1. Setup</li>
-<li>2. Usage</li>
-<li>3. Upload patch</li>
-<li>4. Update patch</li>
-</ul></li>
-<li>JIRA command line tool
-
-<ul>
-<li>1. Download the JIRA command line package</li>
-<li>2. Configure JIRA username and password</li>
-</ul></li>
-<li>Reviewboard
-
-<ul>
-<li>1. Install the post-review tool</li>
-<li>2. Configure Stuff</li>
-</ul></li>
-<li>FAQ
-
-<ul>
-<li>When I run the script, it throws the following error and exits</li>
-<li>When I run the script, it throws the following error and exits</li>
-</ul></li>
-</ul>
-
-<h3 id="drill-jira-and-reviewboard-script">Drill JIRA and Reviewboard script</h3>
-
-<h4 id="1.-setup">1. Setup</h4>
-
-<ol>
-<li>Follow instructions <a href="/docs/drill-patch-review-tool/#jira-command-line-tool">here</a> to setup the jira-python package</li>
-<li>Follow instructions <a href="/docs/drill-patch-review-tool/#reviewboard">here</a> to setup the reviewboard python tools</li>
-<li><p>Install the argparse module </p>
-<div class="highlight"><pre><code class="language-text" data-lang="text">On Linux -> sudo yum install python-argparse
-On Mac -> sudo easy_install argparse
-</code></pre></div></li>
-</ol>
-
-<h4 id="2.-usage">2. Usage</h4>
-<div class="highlight"><pre><code class="language-text" data-lang="text">nnarkhed-mn: nnarkhed$ python drill-patch-review.py --help
-usage: drill-patch-review.py [-h] -b BRANCH -j JIRA [-s SUMMARY]
- [-d DESCRIPTION] [-r REVIEWBOARD] [-t TESTING]
- [-v VERSION] [-db] -rbu REVIEWBOARDUSER -rbp REVIEWBOARDPASSWORD
-
-Drill patch review tool
-
-optional arguments:
- -h, --help show this help message and exit
- -b BRANCH, --branch BRANCH
- Tracking branch to create diff against
- -j JIRA, --jira JIRA JIRA corresponding to the reviewboard
- -s SUMMARY, --summary SUMMARY
- Summary for the reviewboard
- -d DESCRIPTION, --description DESCRIPTION
- Description for reviewboard
- -r REVIEWBOARD, --rb REVIEWBOARD
- Review board that needs to be updated
- -t TESTING, --testing-done TESTING
- Text for the Testing Done section of the reviewboard
- -v VERSION, --version VERSION
- Version of the patch
- -db, --debug Enable debug mode
- -rbu, --reviewboard-user Reviewboard user name
- -rbp, --reviewboard-password Reviewboard password
-</code></pre></div>
-<h4 id="3.-upload-patch">3. Upload patch</h4>
-
-<ol>
-<li>Specify the branch against which the patch should be created (-b)</li>
-<li>Specify the corresponding JIRA (-j)</li>
-<li>Specify an <strong>optional</strong> summary (-s) and description (-d) for the reviewboard</li>
-</ol>
-
-<p>Example:</p>
-<div class="highlight"><pre><code class="language-text" data-lang="text">python drill-patch-review.py -b origin/master -j DRILL-241 -rbu tnachen -rbp password
-</code></pre></div>
-<h4 id="4.-update-patch">4. Update patch</h4>
-
-<ol>
-<li>Specify the branch against which the patch should be created (-b)</li>
-<li>Specify the corresponding JIRA (--jira)</li>
-<li>Specify the rb to be updated (-r)</li>
-<li>Specify an <strong>optional</strong> summary (-s) and description (-d) for the reviewboard, if you want to update it</li>
-<li>Specify an <strong>optional</strong> version of the patch. This will be appended to the jira to create a file named JIRA-<version>.patch. The purpose is to be able to upload multiple patches to the JIRA. This has no bearing on the reviewboard update.</li>
-</ol>
-
-<p>Example:</p>
-<div class="highlight"><pre><code class="language-text" data-lang="text">python drill-patch-review.py -b origin/master -j DRILL-241 -r 14081 rbp tnachen -rbp password
-</code></pre></div>
-<h3 id="jira-command-line-tool">JIRA command line tool</h3>
-
-<h4 id="1.-download-the-jira-command-line-package">1. Download the JIRA command line package</h4>
-
-<p>Install the jira-python package.</p>
-<div class="highlight"><pre><code class="language-text" data-lang="text">sudo easy_install jira-python
-</code></pre></div>
-<h4 id="2.-configure-jira-username-and-password">2. Configure JIRA username and password</h4>
-
-<p>Include a jira.ini file in your $HOME directory that contains your Apache JIRA
-username and password.</p>
-<div class="highlight"><pre><code class="language-text" data-lang="text">nnarkhed-mn:~ nnarkhed$ cat ~/jira.ini
-user=nehanarkhede
-password=***********
-</code></pre></div>
-<h3 id="reviewboard">Reviewboard</h3>
-
-<p>This is a quick tutorial on using <a href="https://reviews.apache.org">Review Board</a>
-with Drill.</p>
-
-<h4 id="1.-install-the-post-review-tool">1. Install the post-review tool</h4>
-
-<p>If you are on RHEL, Fedora or CentOS, follow these steps:</p>
-<div class="highlight"><pre><code class="language-text" data-lang="text">sudo yum install python-setuptools
-sudo easy_install -U RBTools
-</code></pre></div>
-<p>If you are on Mac, follow these steps:</p>
-<div class="highlight"><pre><code class="language-text" data-lang="text">sudo easy_install -U setuptools
-sudo easy_install -U RBTools
-</code></pre></div>
-<p>For other platforms, follow the <a href="http://www.reviewboard.org/docs/manual/dev/users/tools/post-review/">instructions</a> to
-setup the post-review tool.</p>
-
-<h4 id="2.-configure-stuff">2. Configure Stuff</h4>
-
-<p>Then you need to configure a few things to make it work.</p>
-
-<p>First set the review board url to use. You can do this from in git:</p>
-<div class="highlight"><pre><code class="language-text" data-lang="text">git config reviewboard.url https://reviews.apache.org
-</code></pre></div>
-<p>If you checked out using the git wip http url that confusingly won't work with
-review board. So you need to configure an override to use the non-http url.
-You can do this by adding a config file like this:</p>
-<div class="highlight"><pre><code class="language-text" data-lang="text">jkreps$ cat ~/.reviewboardrc
-REPOSITORY = 'git://git.apache.org/drill.git'
-TARGET_GROUPS = 'drill-git'
-</code></pre></div>
-<p>GUESS_FIELDS = True</p>
-
-<h3 id="faq">FAQ</h3>
-
-<h4 id="when-i-run-the-script,-it-throws-the-following-error-and-exits">When I run the script, it throws the following error and exits</h4>
-<div class="highlight"><pre><code class="language-text" data-lang="text">nnarkhed$python drill-patch-review.py -b trunk -j DRILL-241
-There don't seem to be any diffs
-</code></pre></div>
-<p>There are two reasons for this:</p>
-
-<ul>
-<li>The code is not checked into your local branch</li>
-<li>The -b branch is not pointing to the remote branch. In the example above, "trunk" is specified as the branch, which is the local branch. The correct value for the -b (--branch) option is the remote branch. "git branch -r" gives the list of the remote branch names.</li>
-</ul>
-
-<h4 id="when-i-run-the-script,-it-throws-the-following-error-and-exits">When I run the script, it throws the following error and exits</h4>
-
-<p>Error uploading diff</p>
-
-<p>Your review request still exists, but the diff is not attached.</p>
-
-<p>One of the most common root causes of this error are that the git remote
-branches are not up-to-date. Since the script already does that, it is
-probably due to some other problem. You can run the script with the --debug
-option that will make post-review run in the debug mode and list the root
-cause of the issue.</p>
-
-
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- <li class="toctree-l2"><a class="reference internal" href="/docs/lexical-structure/">Lexical Structure</a></li>
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-
-
- <li class="toctree-l2"><a class="reference internal" href="/docs/operators/">Operators</a></li>
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-
-
- <li class="toctree-l2"><a href="javascript: void(0);">SQL Functions</a></li>
- <ul style="display: none">
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- <li class="toctree-l3"><a class="reference internal" href="/docs/about-sql-function-examples/">About SQL Function Examples</a></li>
-
- <li class="toctree-l3"><a class="reference internal" href="/docs/math-and-trig/">Math and Trig</a></li>
-
- <li class="toctree-l3"><a class="reference internal" href="/docs/data-type-conversion/">Data Type Conversion</a></li>
-
- <li class="toctree-l3"><a class="reference internal" href="/docs/date-time-functions-and-arithmetic/">Date/Time Functions and Arithmetic</a></li>
-
- <li class="toctree-l3"><a class="reference internal" href="/docs/string-manipulation/">String Manipulation</a></li>
-
- <li class="toctree-l3"><a class="reference internal" href="/docs/aggregate-and-aggregate-statistical/">Aggregate and Aggregate Statistical</a></li>
-
- <li class="toctree-l3"><a class="reference internal" href="/docs/functions-for-handling-nulls/">Functions for Handling Nulls</a></li>
-
- </ul>
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-
-
- <li class="toctree-l2"><a href="javascript: void(0);">SQL Window Functions</a></li>
- <ul style="display: none">
-
- <li class="toctree-l3"><a class="reference internal" href="/docs/sql-window-functions-introduction/">SQL Window Functions Introduction</a></li>
-
- <li class="toctree-l3"><a class="reference internal" href="/docs/aggregate-window-functions/">Aggregate Window Functions</a></li>
-
- <li class="toctree-l3"><a class="reference internal" href="/docs/ranking-window-functions/">Ranking Window Functions</a></li>
-
- <li class="toctree-l3"><a class="reference internal" href="/docs/sql-window-functions-examples/">SQL Window Functions Examples</a></li>
-
- </ul>
-
-
-
- <li class="toctree-l2"><a href="javascript: void(0);">Nested Data Functions</a></li>
- <ul style="display: none">
-
- <li class="toctree-l3"><a class="reference internal" href="/docs/nested-data-limitations/">Nested Data Limitations</a></li>
-
- <li class="toctree-l3"><a class="reference internal" href="/docs/flatten/">FLATTEN</a></li>
-
- <li class="toctree-l3"><a class="reference internal" href="/docs/kvgen/">KVGEN</a></li>
-
- <li class="toctree-l3"><a class="reference internal" href="/docs/repeated-count/">REPEATED_COUNT</a></li>
-
- <li class="toctree-l3"><a class="reference internal" href="/docs/repeated-contains/">REPEATED_CONTAINS</a></li>
-
- </ul>
-
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-
- <li class="toctree-l2"><a class="reference internal" href="/docs/query-directory-functions/">Query Directory Functions</a></li>
-
-
-
- <li class="toctree-l2"><a href="javascript: void(0);">SQL Commands</a></li>
- <ul style="display: none">
-
- <li class="toctree-l3"><a class="reference internal" href="/docs/supported-sql-commands/">Supported SQL Commands</a></li>
-
- <li class="toctree-l3"><a class="reference internal" href="/docs/alter-session/">ALTER SESSION</a></li>
-
- <li class="toctree-l3"><a class="reference internal" href="/docs/alter-system/">ALTER SYSTEM</a></li>
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- <li class="toctree-l3"><a class="reference internal" href="/docs/create-table-as-ctas/">CREATE TABLE AS (CTAS)</a></li>
-
- <li class="toctree-l3"><a class="reference internal" href="/docs/partition-by-clause/">PARTITION BY Clause</a></li>
-
- <li class="toctree-l3"><a class="reference internal" href="/docs/create-view/">CREATE VIEW</a></li>
-
- <li class="toctree-l3"><a class="reference internal" href="/docs/drop-view/">DROP VIEW</a></li>
-
- <li class="toctree-l3"><a class="reference internal" href="/docs/describe/">DESCRIBE</a></li>
-
- <li class="toctree-l3"><a class="reference internal" href="/docs/explain/">EXPLAIN</a></li>
-
- <li class="toctree-l3"><a class="reference internal" href="/docs/select/">SELECT</a></li>
-
- <li class="toctree-l3"><a class="reference internal" href="/docs/select-list/">SELECT List</a></li>
-
- <li class="toctree-l3"><a class="reference internal" href="/docs/from-clause/">FROM Clause</a></li>
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- <li class="toctree-l3"><a class="reference internal" href="/docs/group-by-clause/">GROUP BY Clause</a></li>
-
- <li class="toctree-l3"><a class="reference internal" href="/docs/having-clause/">HAVING Clause</a></li>
-
- <li class="toctree-l3"><a class="reference internal" href="/docs/limit-clause/">LIMIT Clause</a></li>
-
- <li class="toctree-l3"><a class="reference internal" href="/docs/offset-clause/">OFFSET Clause</a></li>
-
- <li class="toctree-l3"><a class="reference internal" href="/docs/order-by-clause/">ORDER BY Clause</a></li>
-
- <li class="toctree-l3"><a class="reference internal" href="/docs/union-set-operator/">UNION Set Operator</a></li>
-
- <li class="toctree-l3"><a class="reference internal" href="/docs/where-clause/">WHERE Clause</a></li>
-
- <li class="toctree-l3"><a class="reference internal" href="/docs/with-clause/">WITH Clause</a></li>
-
- <li class="toctree-l3"><a class="reference internal" href="/docs/show-databases-and-show-schemas/">SHOW DATABASES and SHOW SCHEMAS</a></li>
-
- <li class="toctree-l3"><a class="reference internal" href="/docs/show-files/">SHOW FILES</a></li>
-
- <li class="toctree-l3"><a class="reference internal" href="/docs/show-tables/">SHOW TABLES</a></li>
-
- <li class="toctree-l3"><a class="reference internal" href="/docs/use/">USE</a></li>
-
- </ul>
-
-
-
- <li class="toctree-l2"><a href="javascript: void(0);">SQL Conditional Expressions</a></li>
- <ul style="display: none">
-
- <li class="toctree-l3"><a class="reference internal" href="/docs/case/">CASE</a></li>
-
- </ul>
-
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- <li class="toctree-l2"><a class="reference internal" href="/docs/reserved-keywords/">Reserved Keywords</a></li>
-
-
-
- <li class="toctree-l2"><a class="reference internal" href="/docs/sql-extensions/">SQL Extensions</a></li>
-
-
- </ul>
-
-
-
- <li class="toctree-l1"><a href="javascript: void(0);">Data Sources and File Formats</a></li>
- <ul style="display: none">
-
-
- <li class="toctree-l2"><a class="reference internal" href="/docs/data-sources-and-file-formats-introduction/">Data Sources and File Formats Introduction</a></li>
-
-
-
- <li class="toctree-l2"><a class="reference internal" href="/docs/hive-to-drill-data-type-mapping/">Hive-to-Drill Data Type Mapping</a></li>
-
-
-
- <li class="toctree-l2"><a class="reference internal" href="/docs/deploying-and-using-a-hive-udf/">Deploying and Using a Hive UDF</a></li>
-
-
-
- <li class="toctree-l2"><a class="reference internal" href="/docs/parquet-format/">Parquet Format</a></li>
-
-
-
- <li class="toctree-l2"><a class="reference internal" href="/docs/json-data-model/">JSON Data Model</a></li>
-
-
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- <li class="toctree-l2"><a class="reference internal" href="/docs/text-files-csv-tsv-psv/">Text Files: CSV, TSV, PSV</a></li>
-
-
- </ul>
-
-
-
- <li class="toctree-l1"><a href="javascript: void(0);">Develop Custom Functions</a></li>
- <ul style="display: none">
-
-
- <li class="toctree-l2"><a class="reference internal" href="/docs/develop-custom-functions-introduction/">Develop Custom Functions Introduction</a></li>
-
-
-
- <li class="toctree-l2"><a class="reference internal" href="/docs/developing-a-simple-function/">Developing a Simple Function</a></li>
-
-
-
- <li class="toctree-l2"><a class="reference internal" href="/docs/tutorial-develop-a-simple-function/">Tutorial: Develop a Simple Function</a></li>
-
-
-
- <li class="toctree-l2"><a class="reference internal" href="/docs/developing-an-aggregate-function/">Developing an Aggregate Function</a></li>
-
-
-
- <li class="toctree-l2"><a class="reference internal" href="/docs/adding-custom-functions-to-drill/">Adding Custom Functions to Drill</a></li>
-
-
-
- <li class="toctree-l2"><a class="reference internal" href="/docs/using-custom-functions-in-queries/">Using Custom Functions in Queries</a></li>
-
-
-
- <li class="toctree-l2"><a class="reference internal" href="/docs/custom-function-interfaces/">Custom Function Interfaces</a></li>
-
-
- </ul>
-
-
-
- <li class="toctree-l1"><a class="reference internal" href="/docs/troubleshooting/">Troubleshooting</a></li>
-
-
-
- <li class="toctree-l1"><a href="javascript: void(0);">Developer Information</a></li>
- <ul style="display: none">
-
-
- <li class="toctree-l2"><a href="javascript: void(0);">Develop Drill</a></li>
- <ul style="display: none">
-
- <li class="toctree-l3"><a class="reference internal" href="/docs/compiling-drill-from-source/">Compiling Drill from Source</a></li>
-
- <li class="toctree-l3"><a class="reference internal" href="/docs/drill-patch-review-tool/">Drill Patch Review Tool</a></li>
-
- </ul>
-
-
-
- <li class="toctree-l2"><a href="javascript: void(0);">Contribute to Drill</a></li>
- <ul style="display: none">
-
- <li class="toctree-l3"><a class="reference internal" href="/docs/apache-drill-contribution-guidelines/">Apache Drill Contribution Guidelines</a></li>
-
- <li class="toctree-l3"><a class="reference internal" href="/docs/apache-drill-contribution-ideas/">Apache Drill Contribution Ideas</a></li>
-
- </ul>
-
-
-
- <li class="toctree-l2"><a href="javascript: void(0);">Design Docs</a></li>
- <ul style="display: none">
-
- <li class="toctree-l3"><a class="reference internal" href="/docs/drill-plan-syntax/">Drill Plan Syntax</a></li>
-
- <li class="toctree-l3"><a class="reference internal" href="/docs/rpc-overview/">RPC Overview</a></li>
-
- <li class="toctree-l3"><a class="reference internal" href="/docs/query-stages/">Query Stages</a></li>
-
- <li class="toctree-l3"><a class="reference internal" href="/docs/useful-research/">Useful Research</a></li>
-
- <li class="toctree-l3"><a class="reference internal" href="/docs/value-vectors/">Value Vectors</a></li>
-
- </ul>
-
-
- </ul>
-
-
-
- <li class="toctree-l1"><a href="javascript: void(0);">Release Notes</a></li>
- <ul style="display: none">
-
-
- <li class="toctree-l2"><a class="reference internal" href="/docs/apache-drill-1-1-0-release-notes/">Apache Drill 1.1.0 Release Notes</a></li>
-
-
-
- <li class="toctree-l2"><a class="reference internal" href="/docs/apache-drill-1-0-0-release-notes/">Apache Drill 1.0.0 Release Notes</a></li>
-
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- <li class="toctree-l2"><a class="reference internal" href="/docs/apache-drill-0-9-0-release-notes/">Apache Drill 0.9.0 Release Notes</a></li>
-
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- <li class="toctree-l2"><a class="reference internal" href="/docs/apache-drill-0-8-0-release-notes/">Apache Drill 0.8.0 Release Notes</a></li>
-
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- <li class="toctree-l2"><a class="reference internal" href="/docs/apache-drill-0-7-0-release-notes/">Apache Drill 0.7.0 Release Notes</a></li>
-
-
-
- <li class="toctree-l2"><a class="reference internal" href="/docs/apache-drill-0-6-0-release-notes/">Apache Drill 0.6.0 Release Notes</a></li>
-
-
-
- <li class="toctree-l2"><a class="reference internal" href="/docs/apache-drill-m1-release-notes-apache-drill-alpha/">Apache Drill M1 Release Notes (Apache Drill Alpha)</a></li>
-
-
-
- <li class="toctree-l2"><a class="reference internal" href="/docs/apache-drill-m1-release-notes-apache-drill-alpha/">Apache Drill M1 Release Notes (Apache Drill Alpha)</a></li>
-
-
-
- <li class="toctree-l2"><a class="reference internal" href="/docs/apache-drill-0-5-0-release-notes/">Apache Drill 0.5.0 Release Notes</a></li>
-
-
-
- <li class="toctree-l2"><a class="reference internal" href="/docs/apache-drill-0-4-0-release-notes/">Apache Drill 0.4.0 Release Notes</a></li>
-
-
- </ul>
-
-
-
- <li class="toctree-l1"><a href="javascript: void(0);">Sample Datasets</a></li>
- <ul style="display: none">
-
-
- <li class="toctree-l2"><a class="reference internal" href="/docs/aol-search/">AOL Search</a></li>
-
-
-
- <li class="toctree-l2"><a class="reference internal" href="/docs/enron-emails/">Enron Emails</a></li>
-
-
-
- <li class="toctree-l2"><a class="reference internal" href="/docs/wikipedia-edit-history/">Wikipedia Edit History</a></li>
-
-
- </ul>
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- <li class="toctree-l1"><a href="javascript: void(0);">Archived Pages</a></li>
- <ul style="display: none">
-
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- <li class="toctree-l2"><a class="reference internal" href="/docs/how-to-run-the-drill-demo/">How to Run the Drill Demo</a></li>
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- <li class="toctree-l2"><a class="reference internal" href="/docs/what-is-apache-drill/">What is Apache Drill</a></li>
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- <li><a href="/docs/">Docs</a></li>
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- <li>2014 Q1 Drill Report</li>
-</nav>
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-<div class="main-content-wrapper">
- <div class="main-content">
-
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- <a class="edit-link" href="https://github.com/apache/drill/blob/gh-pages/_docs/progress-reports/001-2014-q1.md" target="_blank"><i class="fa fa-pencil-square-o"></i></a>
-
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- <div class="int_title left">
- <h1>2014 Q1 Drill Report</h1>
-
- </div>
-
- <link href="/css/docpage.css" rel="stylesheet" type="text/css">
-
- <div class="int_text" align="left">
-
- <p>Apache: Project Drill</p>
-
-<p>Description:</p>
-
-<p>Apache Drill is a distributed system for interactive analysis of large-scale
-datasets that is based on Google's Dremel. Its goal is to efficiently process
-nested data, scale to 10,000 servers or more and to be able to process petabyes of data and trillions of records in seconds.</p>
-
-<p>Drill has been incubating since 2012-08-11.</p>
-
-<p>Three Issues to Address in Move to Graduation:</p>
-
-<p>1. Continue to attract new developers and and early users with a variety of
-skills and viewpoints</p>
-
-<p>2. Continue to develop deeper community skills and knowledge by building
-additional releases</p>
-
-<p>3. Demonstrate community robustness by rotating project tasks among multiple
-project members</p>
-
-<p>Issues to Call to Attention of PMC or ASF Board:</p>
-
-<p>None</p>
-
-<p>How community has developed since last report:</p>
-
-<p>Community awareness and participation were strengthened through a meeting of
-the Bay Area Apache Drill User Group in San Jose</p>
-
-<p>sponsored by Yahoo! This event expanded participation to include many new to
-Drill and particularly those interested as potential users (analysts rather
-than developers).</p>
-
-<p>Speakers included Drill project mentor Ted Dunning from MapR, Data Scientist
-Will Ford from Alpine Data Labs, new Drill committer Julian Hyde from
-HortonWorks and Aman Sinha, MapR Drill engineer.</p>
-
-<p>Additional events include:</p>
-
-<p>\u2022 Two new Drill committers accepted appointment: Julian Hyde (HortonWorks) and Tim Chen (Microsoft).</p>
-
-<p>\u2022 Drill has a new project mentor, Sebastian Schelter.</p>
-
-<p>Mailing list discussions:</p>
-
-<p>Subscriptions to the Drill mailing lists have risen to 399 on dev list and 308
-on the user list and 508 uniques across both lists.</p>
-
-<p>There has been active and increasing participation in discussions on the
-developer mailing list, including new participants and developers. Participation on the user list is growing although still small; mainly activity takes place on developer mailing list.</p>
-
-<p>Activity summary for the user mailing list:</p>
-
-<p><a href="http://mail-archives.apache.org/mod_mbox/incubator-drill-user/">http://mail-archives.apache.org/mod_mbox/incubator-drill-user/</a></p>
-
-<p>February to date 02/26/2014: 25</p>
-
-<p>January 2014, 12</p>
-
-<p>December 2013, 62</p>
-
-<p>Topics in discussion on the user mailing list included but not limited to:</p>
-
-<ul>
-<li>Feb 2014: Connecting Drill to HBase, Support for Distinct/Count</li>
-<li>Jan 2014: Loading Data into Drill, Data Locality</li>
-<li>December 2013: Loading Data into Drill, Setting Drill with HDFS and other Storage engines</li>
-</ul>
-
-<p>Activity summary for the dev mailing list:</p>
-
-<p><a href="http://mail-archives.apache.org/mod_mbox/incubator-drill-dev/">http://mail-archives.apache.org/mod_mbox/incubator-drill-dev/</a></p>
-
-<p>February to date 02/26/2014: 250 (jira; discussion; review requests)</p>
-
-<p>January 2014, 156(jira, focused discussions)</p>
-
-<p>December 2013, 51 (jira; focused discussions)</p>
-
-<p>Topics in discussion on the dev mailing list included but not</p>
-
-<p>limited to:</p>
-
-<p>\u2022 February to date 02/26/2014: How to contribute to Drill;
-review requests for Drill 357, 346, 366, 364; status of Drill functions including Hash functions; support operators +,- for date and interval arithmetic</p>
-
-<p>\u2022 January: Sql Options discussions, Casting discussions, Multiplex Data
-Channel feedbacks</p>
-
-<p>\u2022 December: Guide for new comers contribution, Aggregate functions code gen
-feedback</p>
-
-<p>Code</p>
-
-<p>For details of code commits, see <a href="http://bit.ly/14YPXN9">http://bit.ly/14YPXN9</a></p>
-
-<p>There has been continued activity in code commits</p>
-
-<p>19 contributors have participated in GitHUB code activity; there have been 116 forks.</p>
-
-<p>February code commits include but not limited to: Support for
-Information_schema, Hive storage and metastore integration, Optiq JDBC
-thinning and refactoring, Math functions rework to use codegen, Column pruning
-for Parquet/Json, Moving Sql parsing into Drillbit server side, TravisCI setup</p>
-
-<p>January code commits include but not limited to: Implicit and explicit casting
-support, Broadcast Sender exchange, add TPC-H test queries, Refactor memory
-allocation to use hierarchical memory allocation and freeing.</p>
-
-<p>Community Interactions</p>
-
-<p>Weekly Drill hangout continues, conducted remotely through Google hangouts
-Tuesday mornings 9am Pacific Time to keep core developers in contact in realtime despite geographical separation.</p>
-
-<p>Community stays in touch through @ApacheDrill Twitter ID, and by postings on
-various blogs including Apache Drill User <a href="http://drill-user.org/">http://drill-user.org/</a> which has
-had several updates and through international presentations at conferences.</p>
-
-<p>Viability of community is also apparent through active participation in the
-Bay Area Apache Drill User group meeting in early November, which has grown to
-440 members.</p>
-
-<p>Sample presentations:</p>
-
-<p>\u2022 \u201cHow to Use Drill\u201d by Ted Dunning and Will Ford, Bay Area Apache Drill Meet-
-up 24 February</p>
-
-<p>\u2022 \u201cHow Drill Addresses Dynamic Typing\u201d by Julian Hyde, Bay Area Apache Drill
-Meet-up 24 February</p>
-
-<p>\u2022 \u201cNew Features and Infrastructure Improvements\u201d by Aman Sinha, Bay Area
-Apache Drill Meet-up 24 February</p>
-
-<p>Articles</p>
-
-<p>Examples of articles or reports on Apache Drill since last report include:</p>
-
-<p>\u2022 Drill blog post by Ellen Friedman at Apache Drill User updating community on
-how people will use Drill and inviting comments/ questions from remote
-participants as part of the Drill User Group <a href="http://bit.ly/1p1Qvgn">http://bit.ly/1p1Qvgn</a></p>
-
-<p>\u2022 Drill blog post by Ellen Friedman at Apache Drill User reports on
-appointment of new Drill committers and new mentor <a href="http://bit.ly/JIcwQe">http://bit.ly/JIcwQe</a></p>
-
-<p>Social Networking</p>
-
-<p>@ApacheDrill Twitter entity is active and has grown substantially by 19%, to 744 followers.</p>
-
-<p>How project has developed since last report:</p>
-
-<p>1. Significant progress is being made on execution engine and sql front end
-to support more functionality, also more integrations with storage engines.</p>
-
-<p>2. Work on ODBC driver has begun with a new group led by George Chow in
-Vancouver.</p>
-
-<p>3. Significant code drops have been checked in from a number of contributors
-and commiters</p>
-
-<p>4. Work toward 2nd milestone is progressing substantially.</p>
-
-<p>Please check this [ ] when you have filled in the report for Drill.</p>
-
-<p>Signed-off-by:</p>
-
-<ul>
-<li>Ted Dunning</li>
-<li>Grant Ingersoll</li>
-<li>Isabel Drost</li>
-<li>Sebastian Schelter</li>
-</ul>
-
-
-
- <div class="doc-nav">
-
- <span class="previous-toc"><a href="/docs/progress-reports/">\u2190 Progress Reports</a></span><span class="next-toc"><a href="/docs/project-bylaws/">Project Bylaws \u2192</a></span>
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[11/51] [partial] drill-site git commit: Cleaning up deleted content.
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-<div class="highlight"><pre><code class="language-text" data-lang="text"> [ OFFSET start { ROW | ROWS } ]
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-<p>The following example query returns the result set from row 101 and on, skipping the first 100 rows of the table:</p>
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-also look at costing information, troubleshoot performance issues, and
-diagnose routine errors that may occur when you run queries.</p>
-
-<p>Drill provides two variations on the EXPLAIN command, one that returns the
-physical plan and one that returns the logical plan. A logical plan takes the
-SQL query (as written by the user and accepted by the parser) and translates
-it into a logical series of operations that correspond to SQL language
-constructs (without defining the specific algorithms that will be implemented
-to run the query). A physical plan translates the logical plan into a specific
-series of steps that will be used when the query runs. For example, a logical
-plan may indicate a join step in general and classify it as inner or outer,
-but the corresponding physical plan will indicate the specific type of join
-operator that will run, such as a merge join or a hash join. The physical plan
-is operational and reveals the specific <em>access methods</em> that will be used for
-the query.</p>
-
-<p>An EXPLAIN command for a query that is run repeatedly under the exact same
-conditions against the same data will return the same plan. However, if you
-change a configuration option, for example, or update the tables or files that
-you are selecting from, you are likely to see plan changes.</p>
-
-<h2 id="explain-syntax">EXPLAIN Syntax</h2>
-
-<p>The EXPLAIN command supports the following syntax:</p>
-<div class="highlight"><pre><code class="language-text" data-lang="text">explain plan [ including all attributes ] [ with implementation | without implementation ] for <query> ;
-</code></pre></div>
-<p>where <code>query</code> is any valid SELECT statement supported by Drill.</p>
-
-<h5 id="including-all-attributes">INCLUDING ALL ATTRIBUTES</h5>
-
-<p>This option returns costing information. You can use this option for both
-physical and logical plans.</p>
-
-<h4 id="with-implementation-|-without-implementation">WITH IMPLEMENTATION | WITHOUT IMPLEMENTATION</h4>
-
-<p>These options return the physical and logical plan information, respectively.
-The default is physical (WITH IMPLEMENTATION).</p>
-
-<h2 id="explain-for-physical-plans">EXPLAIN for Physical Plans</h2>
-
-<p>The EXPLAIN PLAN FOR <query> command returns the chosen physical execution
-plan for a query statement without running the query. You can use this command
-to see what kind of execution operators Drill implements. For example, you can
-find out what kind of join algorithm is chosen when tables or files are
-joined. You can also use this command to analyze errors and troubleshoot
-queries that do not run. For example, if you run into a casting error, the
-query plan text may help you isolate the problem.</p>
-
-<p>Use the following syntax:</p>
-<div class="highlight"><pre><code class="language-text" data-lang="text">explain plan for <query> ;
-</code></pre></div>
-<p>The following set command increases the default text display (number of
-characters). By default, most of the plan output is not displayed.</p>
-<div class="highlight"><pre><code class="language-text" data-lang="text">0: jdbc:drill:zk=local> !set maxwidth 10000
-</code></pre></div>
-<p>Do not use a semicolon to terminate set commands.</p>
-
-<p>For example, here is the top portion of the explain output for a
-COUNT(DISTINCT) query on a JSON file:</p>
-<div class="highlight"><pre><code class="language-text" data-lang="text">0: jdbc:drill:zk=local> !set maxwidth 10000
-0: jdbc:drill:zk=local> explain plan for select type t, count(distinct id) from dfs.`/home/donuts/donuts.json` where type='donut' group by type;
-+------------+------------+
-| text | json |
-+------------+------------+
-| 00-00 Screen
-00-01 Project(t=[$0], EXPR$1=[$1])
-00-02 Project(t=[$0], EXPR$1=[$1])
-00-03 HashAgg(group=[{0}], EXPR$1=[COUNT($1)])
-00-04 HashAgg(group=[{0, 1}])
-00-05 SelectionVectorRemover
-00-06 Filter(condition=[=($0, 'donut')])
-00-07 Scan(groupscan=[EasyGroupScan [selectionRoot=/home/donuts/donuts.json, numFiles=1, columns=[`type`, `id`], files=[file:/home/donuts/donuts.json]]])...
-...
-</code></pre></div>
-<p>Read the text output from bottom to top to understand the sequence of
-operators that will execute the query. Note that the physical plan starts with
-a scan of the JSON file that is being queried. The selected columns are
-projected and filtered, then the aggregate function is applied.</p>
-
-<p>The EXPLAIN text output is followed by detailed JSON output, which is reusable
-for submitting the query via Drill APIs.</p>
-<div class="highlight"><pre><code class="language-text" data-lang="text">| {
- "head" : {
- "version" : 1,
- "generator" : {
- "type" : "ExplainHandler",
- "info" : ""
- },
- "type" : "APACHE_DRILL_PHYSICAL",
- "options" : [ ],
- "queue" : 0,
- "resultMode" : "EXEC"
- },
-....
-</code></pre></div>
-<h2 id="costing-information">Costing Information</h2>
-
-<p>Add the INCLUDING ALL ATTRIBUTES option to the EXPLAIN command to see cost
-estimates for the query plan. For example:</p>
-<div class="highlight"><pre><code class="language-text" data-lang="text">0: jdbc:drill:zk=local> !set maxwidth 10000
-0: jdbc:drill:zk=local> explain plan including all attributes for select * from dfs.`/home/donuts/donuts.json` where type='donut';
-+------------+------------+
-| text | json |
-+------------+------------+
-| 00-00 Screen: rowcount = 1.0, cumulative cost = {5.1 rows, 21.1 cpu, 0.0 io, 0.0 network, 0.0 memory}, id = 889
-00-01 Project(*=[$0]): rowcount = 1.0, cumulative cost = {5.0 rows, 21.0 cpu, 0.0 io, 0.0 network, 0.0 memory}, id = 888
-00-02 Project(T1��*=[$0]): rowcount = 1.0, cumulative cost = {4.0 rows, 17.0 cpu, 0.0 io, 0.0 network, 0.0 memory}, id = 887
-00-03 SelectionVectorRemover: rowcount = 1.0, cumulative cost = {3.0 rows, 13.0 cpu, 0.0 io, 0.0 network, 0.0 memory}, id = 886
-00-04 Filter(condition=[=($1, 'donut')]): rowcount = 1.0, cumulative cost = {2.0 rows, 12.0 cpu, 0.0 io, 0.0 network, 0.0 memory}, id = 885
-00-05 Project(T1��*=[$0], type=[$1]): rowcount = 1.0, cumulative cost = {1.0 rows, 8.0 cpu, 0.0 io, 0.0 network, 0.0 memory}, id = 884
-00-06 Scan(groupscan=[EasyGroupScan [selectionRoot=/home/donuts/donuts.json, numFiles=1, columns=[`*`], files=[file:/home/donuts/donuts.json]]]): rowcount = 1.0, cumulative cost = {0.0 rows, 0.0 cpu, 0.0 io, 0.0 network, 0.0 memory}, id = 883
-</code></pre></div>
-<h2 id="explain-for-logical-plans">EXPLAIN for Logical Plans</h2>
-
-<p>To return the logical plan for a query (again, without actually running the
-query), use the EXPLAIN PLAN WITHOUT IMPLEMENTATION syntax:</p>
-<div class="highlight"><pre><code class="language-text" data-lang="text">explain plan without implementation for <query> ;
-</code></pre></div>
-<p>For example:</p>
-<div class="highlight"><pre><code class="language-text" data-lang="text">0: jdbc:drill:zk=local> explain plan without implementation for select type t, count(distinct id) from dfs.`/home/donuts/donuts.json` where type='donut' group by type;
-+------------+------------+
-| text | json |
-+------------+------------+
-| DrillScreenRel
- DrillProjectRel(t=[$0], EXPR$1=[$1])
- DrillAggregateRel(group=[{0}], EXPR$1=[COUNT($1)])
- DrillAggregateRel(group=[{0, 1}])
- DrillFilterRel(condition=[=($0, 'donut')])
- DrillScanRel(table=[[dfs, /home/donuts/donuts.json]], groupscan=[EasyGroupScan [selectionRoot=/home/donuts/donuts.json, numFiles=1, columns=[`type`, `id`], files=[file:/home/donuts/donuts.json]]]) | {
- | {
- "head" : {
- "version" : 1,
- "generator" : {
- "type" : "org.apache.drill.exec.planner.logical.DrillImplementor",
- "info" : ""
- },
- "type" : "APACHE_DRILL_LOGICAL",
- "options" : null,
- "queue" : 0,
- "resultMode" : "LOGICAL"
- },...
-</code></pre></div>
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- <li class="toctree-l3"><a class="reference internal" href="/docs/lesson-2-run-queries-with-ansi-sql/">Lesson 2: Run Queries with ANSI SQL</a></li>
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- <li class="toctree-l3"><a class="reference internal" href="/docs/lesson-3-run-queries-on-complex-data-types/">Lesson 3: Run Queries on Complex Data Types</a></li>
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- <li class="toctree-l3"><a class="reference internal" href="/docs/summary/">Summary</a></li>
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- </ul>
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- <li class="toctree-l2"><a class="reference internal" href="/docs/analyzing-highly-dynamic-datasets/">Analyzing Highly Dynamic Datasets</a></li>
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- <li class="toctree-l2"><a class="reference internal" href="/docs/analyzing-social-media/">Analyzing Social Media</a></li>
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- </ul>
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- <li class="toctree-l1"><a href="javascript: void(0);">Install Drill</a></li>
- <ul style="display: none">
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- <li class="toctree-l2"><a class="reference internal" href="/docs/install-drill-introduction/">Install Drill Introduction</a></li>
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- <li class="toctree-l2"><a href="javascript: void(0);">Installing Drill in Embedded Mode</a></li>
- <ul style="display: none">
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- <li class="toctree-l3"><a class="reference internal" href="/docs/embedded-mode-prerequisites/">Embedded Mode Prerequisites</a></li>
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- <li class="toctree-l3"><a class="reference internal" href="/docs/installing-drill-on-linux-and-mac-os-x/">Installing Drill on Linux and Mac OS X</a></li>
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- <li class="toctree-l3"><a class="reference internal" href="/docs/starting-drill-on-linux-and-mac-os-x/">Starting Drill on Linux and Mac OS X</a></li>
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- <li class="toctree-l3"><a class="reference internal" href="/docs/installing-drill-on-windows/">Installing Drill on Windows</a></li>
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- <li class="toctree-l3"><a class="reference internal" href="/docs/starting-drill-on-windows/">Starting Drill on Windows</a></li>
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- </ul>
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- <li class="toctree-l2"><a href="javascript: void(0);">Installing Drill in Distributed Mode</a></li>
- <ul style="display: none">
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- <li class="toctree-l3"><a class="reference internal" href="/docs/distributed-mode-prerequisites/">Distributed Mode Prerequisites</a></li>
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- <li class="toctree-l3"><a class="reference internal" href="/docs/installing-drill-on-the-cluster/">Installing Drill on the Cluster</a></li>
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- <li class="toctree-l3"><a class="reference internal" href="/docs/starting-drill-in-distributed-mode/">Starting Drill in Distributed Mode</a></li>
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- </ul>
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-
- </ul>
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-
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- <li class="toctree-l1"><a href="javascript: void(0);">Configure Drill</a></li>
- <ul style="display: none">
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- <li class="toctree-l2"><a class="reference internal" href="/docs/configure-drill-introduction/">Configure Drill Introduction</a></li>
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- <li class="toctree-l2"><a class="reference internal" href="/docs/configuring-drill-memory/">Configuring Drill Memory</a></li>
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- <li class="toctree-l2"><a href="javascript: void(0);">Configuring a Multitenant Cluster</a></li>
- <ul style="display: none">
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- <li class="toctree-l3"><a class="reference internal" href="/docs/configuring-a-multitenant-cluster-introduction/">Configuring a Multitenant Cluster Introduction</a></li>
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- <li class="toctree-l3"><a class="reference internal" href="/docs/configuring-multitenant-resources/">Configuring Multitenant Resources</a></li>
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- <li class="toctree-l3"><a class="reference internal" href="/docs/configuring-resources-for-a-shared-drillbit/">Configuring Resources for a Shared Drillbit</a></li>
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- </ul>
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-
-
- <li class="toctree-l2"><a class="reference internal" href="/docs/configuring-user-impersonation/">Configuring User Impersonation</a></li>
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- <li class="toctree-l2"><a class="reference internal" href="/docs/configuring-user-authentication/">Configuring User Authentication</a></li>
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- <li class="toctree-l2"><a href="javascript: void(0);">Configuration Options</a></li>
- <ul style="display: none">
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- <li class="toctree-l3"><a class="reference internal" href="/docs/configuration-options-introduction/">Configuration Options Introduction</a></li>
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- <li class="toctree-l3"><a class="reference internal" href="/docs/start-up-options/">Start-Up Options</a></li>
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- <li class="toctree-l3"><a class="reference internal" href="/docs/planning-and-execution-options/">Planning and Execution Options</a></li>
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- <li class="toctree-l3"><a class="reference internal" href="/docs/persistent-configuration-storage/">Persistent Configuration Storage</a></li>
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- </ul>
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- <li class="toctree-l2"><a class="reference internal" href="/docs/ports-used-by-drill/">Ports Used by Drill</a></li>
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- <li class="toctree-l2"><a class="reference internal" href="/docs/configuring-the-drill-shell/">Configuring the Drill Shell</a></li>
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- </ul>
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- <li class="toctree-l1"><a href="javascript: void(0);">Connect a Data Source</a></li>
- <ul style="display: none">
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- <li class="toctree-l2"><a class="reference internal" href="/docs/connect-a-data-source-introduction/">Connect a Data Source Introduction</a></li>
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- <li class="toctree-l2"><a class="reference internal" href="/docs/storage-plugin-registration/">Storage Plugin Registration</a></li>
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- <li class="toctree-l2"><a href="javascript: void(0);">Storage Plugin Configuration</a></li>
- <ul style="display: none">
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- <li class="toctree-l3"><a class="reference internal" href="/docs/plugin-configuration-basics/">Plugin Configuration Basics</a></li>
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- <li class="toctree-l3"><a class="reference internal" href="/docs/file-system-storage-plugin/">File System Storage Plugin</a></li>
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- <li class="toctree-l3"><a class="reference internal" href="/docs/workspaces/">Workspaces</a></li>
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- <li class="toctree-l3"><a class="reference internal" href="/docs/hbase-storage-plugin/">HBase Storage Plugin</a></li>
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- <li class="toctree-l3"><a class="reference internal" href="/docs/hive-storage-plugin/">Hive Storage Plugin</a></li>
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- <li class="toctree-l3"><a class="reference internal" href="/docs/drill-default-input-format/">Drill Default Input Format</a></li>
-
- </ul>
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-
-
- <li class="toctree-l2"><a class="reference internal" href="/docs/mongodb-plugin-for-apache-drill/">MongoDB Plugin for Apache Drill</a></li>
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- <li class="toctree-l2"><a class="reference internal" href="/docs/mapr-db-format/">MapR-DB Format</a></li>
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-
- </ul>
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- <li class="toctree-l1 current_section "><a href="javascript: void(0);">ODBC/JDBC Interfaces</a></li>
- <ul class="current_section">
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- <li class="toctree-l2"><a class="reference internal" href="/docs/interfaces-introduction/">Interfaces Introduction</a></li>
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- <li class="toctree-l2"><a class="reference internal" href="/docs/using-jdbc-with-squirrel-on-windows/">Using JDBC with SQuirreL on Windows</a></li>
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- <li class="toctree-l2"><a href="javascript: void(0);">Installing the ODBC Driver</a></li>
- <ul style="display: none">
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- <li class="toctree-l3"><a class="reference internal" href="/docs/installing-the-driver-on-linux/">Installing the Driver on Linux</a></li>
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- <li class="toctree-l3"><a class="reference internal" href="/docs/installing-the-driver-on-mac-os-x/">Installing the Driver on Mac OS X</a></li>
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- <li class="toctree-l3"><a class="reference internal" href="/docs/installing-the-driver-on-windows/">Installing the Driver on Windows</a></li>
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- </ul>
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- <li class="toctree-l2"><a href="javascript: void(0);">Configuring ODBC</a></li>
- <ul style="display: none">
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- <li class="toctree-l3"><a class="reference internal" href="/docs/odbc-configuration-reference/">ODBC Configuration Reference</a></li>
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- <li class="toctree-l3"><a class="reference internal" href="/docs/configuring-odbc-on-linux-mac-os-x/">Configuring ODBC on Linux/Mac OS X</a></li>
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- <li class="toctree-l3"><a class="reference internal" href="/docs/configuring-odbc-on-windows/">Configuring ODBC on Windows</a></li>
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- <li class="toctree-l3"><a class="reference internal" href="/docs/testing-the-odbc-connection/">Testing the ODBC Connection</a></li>
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- </ul>
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- <li class="toctree-l2"><a href="javascript: void(0);">Using Drill Explorer</a></li>
- <ul style="">
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- <li class="toctree-l3 current"><a class="reference internal" href="/docs/connecting-to-odbc-data-sources/">Connecting to ODBC Data Sources</a></li>
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- <li class="toctree-l3"><a class="reference internal" href="/docs/using-drill-explorer-on-windows/">Using Drill Explorer on Windows</a></li>
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- </ul>
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- <li class="toctree-l2"><a href="javascript: void(0);">Using Drill with BI Tools</a></li>
- <ul style="display: none">
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- <li class="toctree-l3"><a class="reference internal" href="/docs/using-drill-with-bi-tools-introduction/">Using Drill with BI Tools Introduction</a></li>
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- <li class="toctree-l3"><a class="reference internal" href="/docs/tableau-examples/">Tableau Examples</a></li>
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- <li class="toctree-l3"><a class="reference internal" href="/docs/using-microstrategy-analytics-with-apache-drill/">Using MicroStrategy Analytics with Apache Drill</a></li>
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- <li class="toctree-l3"><a class="reference internal" href="/docs/using-tibco-spotfire-with-drill/">Using Tibco Spotfire with Drill</a></li>
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- <li class="toctree-l3"><a class="reference internal" href="/docs/using-apache-drill-with-tableau-9-desktop/">Using Apache Drill with Tableau 9 Desktop</a></li>
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- <li class="toctree-l3"><a class="reference internal" href="/docs/using-apache-drill-with-tableau-9-server/">Using Apache Drill with Tableau 9 Server</a></li>
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- </ul>
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-
- </ul>
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- <li class="toctree-l1"><a href="javascript: void(0);">Query Data</a></li>
- <ul style="display: none">
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- <li class="toctree-l2"><a class="reference internal" href="/docs/query-data-introduction/">Query Data Introduction</a></li>
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-
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- <li class="toctree-l2"><a href="javascript: void(0);">Querying a File System</a></li>
- <ul style="display: none">
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- <li class="toctree-l3"><a class="reference internal" href="/docs/querying-a-file-system-introduction/">Querying a File System Introduction</a></li>
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- <li class="toctree-l3"><a class="reference internal" href="/docs/querying-json-files/">Querying JSON Files</a></li>
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- <li class="toctree-l3"><a class="reference internal" href="/docs/querying-parquet-files/">Querying Parquet Files</a></li>
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- <li class="toctree-l3"><a class="reference internal" href="/docs/querying-plain-text-files/">Querying Plain Text Files</a></li>
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- <li class="toctree-l3"><a class="reference internal" href="/docs/querying-directories/">Querying Directories</a></li>
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- </ul>
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- <li class="toctree-l2"><a class="reference internal" href="/docs/querying-hbase/">Querying HBase</a></li>
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- <li class="toctree-l2"><a href="javascript: void(0);">Querying Complex Data</a></li>
- <ul style="display: none">
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- <li class="toctree-l3"><a class="reference internal" href="/docs/querying-complex-data-introduction/">Querying Complex Data Introduction</a></li>
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- <li class="toctree-l3"><a class="reference internal" href="/docs/sample-data-donuts/">Sample Data: Donuts</a></li>
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- <li class="toctree-l3"><a class="reference internal" href="/docs/selecting-flat-data/">Selecting Flat Data</a></li>
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- <li class="toctree-l3"><a class="reference internal" href="/docs/using-sql-functions-clauses-and-joins/">Using SQL Functions, Clauses, and Joins</a></li>
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- <li class="toctree-l3"><a class="reference internal" href="/docs/selecting-nested-data-for-a-column/">Selecting Nested Data for a Column</a></li>
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- <li class="toctree-l3"><a class="reference internal" href="/docs/selecting-multiple-columns-within-nested-data/">Selecting Multiple Columns Within Nested Data</a></li>
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- </ul>
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-
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- <li class="toctree-l2"><a class="reference internal" href="/docs/querying-hive/">Querying Hive</a></li>
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-
-
- <li class="toctree-l2"><a class="reference internal" href="/docs/querying-the-information-schema/">Querying the INFORMATION SCHEMA</a></li>
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-
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- <li class="toctree-l2"><a class="reference internal" href="/docs/querying-system-tables/">Querying System Tables</a></li>
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-
-
- <li class="toctree-l2"><a class="reference internal" href="/docs/monitoring-and-canceling-queries-in-the-drill-web-ui/">Monitoring and Canceling Queries in the Drill Web UI</a></li>
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-
- </ul>
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-
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- <li class="toctree-l1"><a href="javascript: void(0);">Performance Tuning</a></li>
- <ul style="display: none">
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- <li class="toctree-l2"><a class="reference internal" href="/docs/performance-tuning-introduction/">Performance Tuning Introduction</a></li>
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-
-
- <li class="toctree-l2"><a class="reference internal" href="/docs/partition-pruning/">Partition Pruning</a></li>
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-
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- <li class="toctree-l2"><a class="reference internal" href="/docs/choosing-a-storage-format/">Choosing a Storage Format</a></li>
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- <li class="toctree-l2"><a href="javascript: void(0);">Query Plans and Tuning</a></li>
- <ul style="display: none">
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- <li class="toctree-l3"><a class="reference internal" href="/docs/query-plans-and-tuning-introduction/">Query Plans and Tuning Introduction</a></li>
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- <li class="toctree-l3"><a class="reference internal" href="/docs/join-planning-guidelines/">Join Planning Guidelines</a></li>
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- <li class="toctree-l3"><a class="reference internal" href="/docs/guidelines-for-optimizing-aggregation/">Guidelines for Optimizing Aggregation</a></li>
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- <li class="toctree-l3"><a class="reference internal" href="/docs/modifying-query-planning-options/">Modifying Query Planning Options</a></li>
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- <li class="toctree-l3"><a class="reference internal" href="/docs/sort-based-and-hash-based-memory-constrained-operators/">Sort-Based and Hash-Based Memory-Constrained Operators</a></li>
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- <li class="toctree-l3"><a class="reference internal" href="/docs/enabling-query-queuing/">Enabling Query Queuing</a></li>
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- <li class="toctree-l3"><a class="reference internal" href="/docs/controlling-parallelization-to-balance-performance-with-multi-tenancy/">Controlling Parallelization to Balance Performance with Multi-Tenancy</a></li>
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- </ul>
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-
-
- <li class="toctree-l2"><a href="javascript: void(0);">Identifying Performance Issues</a></li>
- <ul style="display: none">
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- <li class="toctree-l3"><a class="reference internal" href="/docs/query-plans/">Query Plans</a></li>
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- <li class="toctree-l3"><a class="reference internal" href="/docs/query-profiles/">Query Profiles</a></li>
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- </ul>
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- <li class="toctree-l2"><a href="javascript: void(0);">Performance Tuning Reference</a></li>
- <ul style="display: none">
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- <li class="toctree-l3"><a class="reference internal" href="/docs/query-profile-column-descriptions/">Query Profile Column Descriptions</a></li>
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- <li class="toctree-l3"><a class="reference internal" href="/docs/physical-operators/">Physical Operators</a></li>
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- </ul>
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- </ul>
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- <li class="toctree-l1"><a href="javascript: void(0);">Log and Debug</a></li>
- <ul style="display: none">
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- <li class="toctree-l2"><a class="reference internal" href="/docs/log-and-debug-introduction/">Log and Debug Introduction</a></li>
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- <li class="toctree-l2"><a class="reference internal" href="/docs/error-messages/">Error Messages</a></li>
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- <li class="toctree-l2"><a class="reference internal" href="/docs/modify-logback-xml/">Modify logback.xml</a></li>
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- <li class="toctree-l2"><a class="reference internal" href="/docs/review-the-java-stack-trace/">Review the Java Stack Trace</a></li>
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- <li class="toctree-l2"><a class="reference internal" href="/docs/query-audit-logging/">Query Audit Logging</a></li>
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- </ul>
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- <li class="toctree-l1"><a href="javascript: void(0);">SQL Reference</a></li>
- <ul style="display: none">
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- <li class="toctree-l2"><a class="reference internal" href="/docs/sql-reference-introduction/">SQL Reference Introduction</a></li>
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- <ul style="display: none">
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- <li class="toctree-l3"><a class="reference internal" href="/docs/supported-data-types/">Supported Data Types</a></li>
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- <li class="toctree-l3"><a class="reference internal" href="/docs/date-time-and-timestamp/">Date, Time, and Timestamp</a></li>
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- <li class="toctree-l3"><a class="reference internal" href="/docs/handling-different-data-types/">Handling Different Data Types</a></li>
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- </ul>
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- <li class="toctree-l2"><a class="reference internal" href="/docs/lexical-structure/">Lexical Structure</a></li>
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- <li class="toctree-l2"><a class="reference internal" href="/docs/operators/">Operators</a></li>
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- <li class="toctree-l2"><a href="javascript: void(0);">SQL Functions</a></li>
- <ul style="display: none">
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- <li class="toctree-l3"><a class="reference internal" href="/docs/about-sql-function-examples/">About SQL Function Examples</a></li>
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- <li class="toctree-l3"><a class="reference internal" href="/docs/math-and-trig/">Math and Trig</a></li>
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- <li class="toctree-l3"><a class="reference internal" href="/docs/data-type-conversion/">Data Type Conversion</a></li>
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- <li class="toctree-l3"><a class="reference internal" href="/docs/date-time-functions-and-arithmetic/">Date/Time Functions and Arithmetic</a></li>
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- <li class="toctree-l3"><a class="reference internal" href="/docs/string-manipulation/">String Manipulation</a></li>
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- <li class="toctree-l3"><a class="reference internal" href="/docs/aggregate-and-aggregate-statistical/">Aggregate and Aggregate Statistical</a></li>
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- <li class="toctree-l3"><a class="reference internal" href="/docs/functions-for-handling-nulls/">Functions for Handling Nulls</a></li>
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- </ul>
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- <li class="toctree-l2"><a href="javascript: void(0);">Nested Data Functions</a></li>
- <ul style="display: none">
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- <li class="toctree-l3"><a class="reference internal" href="/docs/nested-data-limitations/">Nested Data Limitations</a></li>
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- <li class="toctree-l3"><a class="reference internal" href="/docs/flatten/">FLATTEN</a></li>
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- <li class="toctree-l3"><a class="reference internal" href="/docs/kvgen/">KVGEN</a></li>
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- <li class="toctree-l3"><a class="reference internal" href="/docs/repeated-count/">REPEATED_COUNT</a></li>
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- <li class="toctree-l3"><a class="reference internal" href="/docs/repeated-contains/">REPEATED_CONTAINS</a></li>
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- </ul>
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- <li class="toctree-l2"><a class="reference internal" href="/docs/query-directory-functions/">Query Directory Functions</a></li>
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- <li class="toctree-l2"><a href="javascript: void(0);">SQL Commands</a></li>
- <ul style="display: none">
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- <li class="toctree-l3"><a class="reference internal" href="/docs/supported-sql-commands/">Supported SQL Commands</a></li>
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- <li class="toctree-l3"><a class="reference internal" href="/docs/alter-session/">ALTER SESSION</a></li>
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- <li class="toctree-l3"><a class="reference internal" href="/docs/alter-system/">ALTER SYSTEM</a></li>
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- <li class="toctree-l3"><a class="reference internal" href="/docs/create-table-as-ctas/">CREATE TABLE AS (CTAS)</a></li>
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- <li class="toctree-l3"><a class="reference internal" href="/docs/create-view/">CREATE VIEW</a></li>
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- <li class="toctree-l3"><a class="reference internal" href="/docs/drop-view/">DROP VIEW</a></li>
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- <li class="toctree-l3"><a class="reference internal" href="/docs/describe/">DESCRIBE</a></li>
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- <li class="toctree-l3"><a class="reference internal" href="/docs/explain/">EXPLAIN</a></li>
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- <li class="toctree-l3"><a class="reference internal" href="/docs/select/">SELECT</a></li>
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- <li class="toctree-l3"><a class="reference internal" href="/docs/select-list/">SELECT List</a></li>
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- <li class="toctree-l3"><a class="reference internal" href="/docs/from-clause/">FROM Clause</a></li>
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- <li class="toctree-l3"><a class="reference internal" href="/docs/group-by-clause/">GROUP BY Clause</a></li>
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- <li class="toctree-l3"><a class="reference internal" href="/docs/having-clause/">HAVING Clause</a></li>
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- <li class="toctree-l3"><a class="reference internal" href="/docs/limit-clause/">LIMIT Clause</a></li>
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- <li class="toctree-l3"><a class="reference internal" href="/docs/offset-clause/">OFFSET Clause</a></li>
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- <li class="toctree-l3"><a class="reference internal" href="/docs/order-by-clause/">ORDER BY Clause</a></li>
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- <li class="toctree-l3"><a class="reference internal" href="/docs/union-set-operator/">UNION Set Operator</a></li>
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- <li class="toctree-l3"><a class="reference internal" href="/docs/where-clause/">WHERE Clause</a></li>
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- <li class="toctree-l3"><a class="reference internal" href="/docs/with-clause/">WITH Clause</a></li>
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- <li class="toctree-l3"><a class="reference internal" href="/docs/show-databases-and-show-schemas/">SHOW DATABASES and SHOW SCHEMAS</a></li>
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- <li class="toctree-l3"><a class="reference internal" href="/docs/show-files/">SHOW FILES</a></li>
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- <li class="toctree-l3"><a class="reference internal" href="/docs/show-tables/">SHOW TABLES</a></li>
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- <li class="toctree-l3"><a class="reference internal" href="/docs/use/">USE</a></li>
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- <li class="toctree-l2"><a href="javascript: void(0);">SQL Conditional Expressions</a></li>
- <ul style="display: none">
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- <li class="toctree-l3"><a class="reference internal" href="/docs/case/">CASE</a></li>
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- <li class="toctree-l2"><a class="reference internal" href="/docs/reserved-keywords/">Reserved Keywords</a></li>
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- <li class="toctree-l2"><a class="reference internal" href="/docs/sql-extensions/">SQL Extensions</a></li>
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- </ul>
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- <li class="toctree-l1"><a href="javascript: void(0);">Data Sources and File Formats</a></li>
- <ul style="display: none">
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- <li class="toctree-l2"><a class="reference internal" href="/docs/data-sources-and-file-formats-introduction/">Data Sources and File Formats Introduction</a></li>
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- <li class="toctree-l2"><a class="reference internal" href="/docs/ports-used-by-drill/">Ports Used by Drill</a></li>
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- <li class="toctree-l2"><a class="reference internal" href="/docs/configuring-the-drill-shell/">Configuring the Drill Shell</a></li>
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- </ul>
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- <li class="toctree-l1"><a href="javascript: void(0);">Connect a Data Source</a></li>
- <ul style="display: none">
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- <li class="toctree-l2"><a class="reference internal" href="/docs/connect-a-data-source-introduction/">Connect a Data Source Introduction</a></li>
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- <li class="toctree-l2"><a class="reference internal" href="/docs/storage-plugin-registration/">Storage Plugin Registration</a></li>
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- <li class="toctree-l2"><a href="javascript: void(0);">Storage Plugin Configuration</a></li>
- <ul style="display: none">
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- <li class="toctree-l3"><a class="reference internal" href="/docs/plugin-configuration-basics/">Plugin Configuration Basics</a></li>
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- <li class="toctree-l3"><a class="reference internal" href="/docs/file-system-storage-plugin/">File System Storage Plugin</a></li>
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- <li class="toctree-l3"><a class="reference internal" href="/docs/workspaces/">Workspaces</a></li>
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- <li class="toctree-l3"><a class="reference internal" href="/docs/hbase-storage-plugin/">HBase Storage Plugin</a></li>
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- <li class="toctree-l3"><a class="reference internal" href="/docs/hive-storage-plugin/">Hive Storage Plugin</a></li>
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- <li class="toctree-l3"><a class="reference internal" href="/docs/drill-default-input-format/">Drill Default Input Format</a></li>
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- </ul>
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- <li class="toctree-l2"><a class="reference internal" href="/docs/mongodb-plugin-for-apache-drill/">MongoDB Plugin for Apache Drill</a></li>
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- <li class="toctree-l2"><a class="reference internal" href="/docs/mapr-db-format/">MapR-DB Format</a></li>
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- </ul>
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- <li class="toctree-l1 current_section "><a href="javascript: void(0);">ODBC/JDBC Interfaces</a></li>
- <ul class="current_section">
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- <li class="toctree-l2"><a class="reference internal" href="/docs/interfaces-introduction/">Interfaces Introduction</a></li>
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- <li class="toctree-l2"><a class="reference internal" href="/docs/using-jdbc-with-squirrel-on-windows/">Using JDBC with SQuirreL on Windows</a></li>
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- <li class="toctree-l2"><a href="javascript: void(0);">Using ODBC on Linux and Mac OS X</a></li>
- <ul style="">
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- <li class="toctree-l3 current"><a class="reference internal" href="/docs/odbc-on-linux-and-mac-introduction/">ODBC on Linux and Mac Introduction</a></li>
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- <li class="toctree-l3"><a class="reference internal" href="/docs/installing-the-driver-on-linux/">Installing the Driver on Linux</a></li>
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- <li class="toctree-l3"><a class="reference internal" href="/docs/installing-the-driver-on-mac-os-x/">Installing the Driver on Mac OS X</a></li>
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- <li class="toctree-l3"><a class="reference internal" href="/docs/configuring-connections-on-linux-and-mac-os-x/">Configuring Connections on Linux and Mac OS X</a></li>
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- <li class="toctree-l3"><a class="reference internal" href="/docs/driver-configuration-options/">Driver Configuration Options</a></li>
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- <li class="toctree-l3"><a class="reference internal" href="/docs/using-a-connection-string/">Using a Connection String</a></li>
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- <li class="toctree-l3"><a class="reference internal" href="/docs/advanced-properties/">Advanced Properties</a></li>
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- <li class="toctree-l3"><a class="reference internal" href="/docs/testing-the-odbc-connection/">Testing the ODBC Connection</a></li>
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- </ul>
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- <li class="toctree-l2"><a href="javascript: void(0);">Using ODBC on Windows</a></li>
- <ul style="display: none">
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- <li class="toctree-l3"><a class="reference internal" href="/docs/installing-the-driver-on-windows/">Installing the Driver on Windows</a></li>
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- <li class="toctree-l3"><a class="reference internal" href="/docs/configuring-connections-on-windows/">Configuring Connections on Windows</a></li>
-
- <li class="toctree-l3"><a class="reference internal" href="/docs/connecting-to-odbc-data-sources/">Connecting to ODBC Data Sources</a></li>
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- <li class="toctree-l3"><a class="reference internal" href="/docs/tableau-examples/">Tableau Examples</a></li>
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- <li class="toctree-l3"><a class="reference internal" href="/docs/using-drill-explorer-on-windows/">Using Drill Explorer on Windows</a></li>
-
- </ul>
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-
-
- <li class="toctree-l2"><a class="reference internal" href="/docs/using-microstrategy-analytics-with-apache-drill/">Using MicroStrategy Analytics with Apache Drill</a></li>
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-
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- <li class="toctree-l2"><a class="reference internal" href="/docs/using-tibco-spotfire-with-drill/">Using Tibco Spotfire with Drill</a></li>
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-
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- <li class="toctree-l2"><a class="reference internal" href="/docs/configuring-tibco-spotfire-server-with-drill/">Configuring Tibco Spotfire Server with Drill</a></li>
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-
-
- <li class="toctree-l2"><a class="reference internal" href="/docs/using-apache-drill-with-tableau-9-desktop/">Using Apache Drill with Tableau 9 Desktop</a></li>
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- <li class="toctree-l2"><a class="reference internal" href="/docs/using-apache-drill-with-tableau-9-server/">Using Apache Drill with Tableau 9 Server</a></li>
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- </ul>
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- <li class="toctree-l1"><a href="javascript: void(0);">Query Data</a></li>
- <ul style="display: none">
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- <li class="toctree-l2"><a class="reference internal" href="/docs/query-data-introduction/">Query Data Introduction</a></li>
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- <li class="toctree-l2"><a href="javascript: void(0);">Querying a File System</a></li>
- <ul style="display: none">
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- <li class="toctree-l3"><a class="reference internal" href="/docs/querying-a-file-system-introduction/">Querying a File System Introduction</a></li>
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- <li class="toctree-l3"><a class="reference internal" href="/docs/querying-json-files/">Querying JSON Files</a></li>
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- <li class="toctree-l3"><a class="reference internal" href="/docs/querying-parquet-files/">Querying Parquet Files</a></li>
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- <li class="toctree-l3"><a class="reference internal" href="/docs/querying-plain-text-files/">Querying Plain Text Files</a></li>
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- <li class="toctree-l3"><a class="reference internal" href="/docs/querying-directories/">Querying Directories</a></li>
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- </ul>
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- <li class="toctree-l2"><a class="reference internal" href="/docs/querying-hbase/">Querying HBase</a></li>
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- <li class="toctree-l2"><a href="javascript: void(0);">Querying Complex Data</a></li>
- <ul style="display: none">
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- <li class="toctree-l3"><a class="reference internal" href="/docs/querying-complex-data-introduction/">Querying Complex Data Introduction</a></li>
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- <li class="toctree-l3"><a class="reference internal" href="/docs/sample-data-donuts/">Sample Data: Donuts</a></li>
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- <li class="toctree-l3"><a class="reference internal" href="/docs/selecting-flat-data/">Selecting Flat Data</a></li>
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- <li class="toctree-l3"><a class="reference internal" href="/docs/using-sql-functions-clauses-and-joins/">Using SQL Functions, Clauses, and Joins</a></li>
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- <li class="toctree-l3"><a class="reference internal" href="/docs/selecting-nested-data-for-a-column/">Selecting Nested Data for a Column</a></li>
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- <li class="toctree-l3"><a class="reference internal" href="/docs/selecting-multiple-columns-within-nested-data/">Selecting Multiple Columns Within Nested Data</a></li>
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- </ul>
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- <li class="toctree-l2"><a class="reference internal" href="/docs/querying-hive/">Querying Hive</a></li>
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- <li class="toctree-l2"><a class="reference internal" href="/docs/querying-the-information-schema/">Querying the INFORMATION SCHEMA</a></li>
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- <li class="toctree-l2"><a class="reference internal" href="/docs/querying-system-tables/">Querying System Tables</a></li>
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- <li class="toctree-l2"><a class="reference internal" href="/docs/monitoring-and-canceling-queries-in-the-drill-web-ui/">Monitoring and Canceling Queries in the Drill Web UI</a></li>
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-
- </ul>
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-
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- <li class="toctree-l1"><a href="javascript: void(0);">Performance Tuning</a></li>
- <ul style="display: none">
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- <li class="toctree-l2"><a class="reference internal" href="/docs/performance-tuning-introduction/">Performance Tuning Introduction</a></li>
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- <li class="toctree-l2"><a class="reference internal" href="/docs/partition-pruning/">Partition Pruning</a></li>
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- <li class="toctree-l2"><a class="reference internal" href="/docs/choosing-a-storage-format/">Choosing a Storage Format</a></li>
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- <li class="toctree-l2"><a href="javascript: void(0);">Query Plans and Tuning</a></li>
- <ul style="display: none">
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- <li class="toctree-l3"><a class="reference internal" href="/docs/query-plans-and-tuning-introduction/">Query Plans and Tuning Introduction</a></li>
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- <li class="toctree-l3"><a class="reference internal" href="/docs/join-planning-guidelines/">Join Planning Guidelines</a></li>
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- <li class="toctree-l3"><a class="reference internal" href="/docs/guidelines-for-optimizing-aggregation/">Guidelines for Optimizing Aggregation</a></li>
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- <li class="toctree-l3"><a class="reference internal" href="/docs/modifying-query-planning-options/">Modifying Query Planning Options</a></li>
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- <li class="toctree-l3"><a class="reference internal" href="/docs/sort-based-and-hash-based-memory-constrained-operators/">Sort-Based and Hash-Based Memory-Constrained Operators</a></li>
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- <li class="toctree-l3"><a class="reference internal" href="/docs/enabling-query-queuing/">Enabling Query Queuing</a></li>
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- <li class="toctree-l3"><a class="reference internal" href="/docs/controlling-parallelization-to-balance-performance-with-multi-tenancy/">Controlling Parallelization to Balance Performance with Multi-Tenancy</a></li>
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- </ul>
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-
-
- <li class="toctree-l2"><a href="javascript: void(0);">Identifying Performance Issues</a></li>
- <ul style="display: none">
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- <li class="toctree-l3"><a class="reference internal" href="/docs/query-plans/">Query Plans</a></li>
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- <li class="toctree-l3"><a class="reference internal" href="/docs/query-profiles/">Query Profiles</a></li>
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- </ul>
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-
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- <li class="toctree-l2"><a href="javascript: void(0);">Performance Tuning Reference</a></li>
- <ul style="display: none">
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- <li class="toctree-l3"><a class="reference internal" href="/docs/query-profile-column-descriptions/">Query Profile Column Descriptions</a></li>
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- <li class="toctree-l3"><a class="reference internal" href="/docs/physical-operators/">Physical Operators</a></li>
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- </ul>
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-
- </ul>
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-
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- <li class="toctree-l1"><a href="javascript: void(0);">Log and Debug</a></li>
- <ul style="display: none">
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- <li class="toctree-l2"><a class="reference internal" href="/docs/log-and-debug-introduction/">Log and Debug Introduction</a></li>
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- <li class="toctree-l2"><a class="reference internal" href="/docs/error-messages/">Error Messages</a></li>
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-
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- <li class="toctree-l2"><a class="reference internal" href="/docs/modify-logback-xml/">Modify logback.xml</a></li>
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-
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- <li class="toctree-l2"><a class="reference internal" href="/docs/review-the-java-stack-trace/">Review the Java Stack Trace</a></li>
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-
- </ul>
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-
-
- <li class="toctree-l1"><a href="javascript: void(0);">Query Audit Logging</a></li>
- <ul style="display: none">
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- <li class="toctree-l2"><a class="reference internal" href="/docs/getting-query-information/">Getting Query Information</a></li>
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- </ul>
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- <li class="toctree-l1"><a href="javascript: void(0);">SQL Reference</a></li>
- <ul style="display: none">
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- <li class="toctree-l2"><a class="reference internal" href="/docs/sql-reference-introduction/">SQL Reference Introduction</a></li>
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- <li class="toctree-l2"><a href="javascript: void(0);">Data Types</a></li>
- <ul style="display: none">
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- <li class="toctree-l3"><a class="reference internal" href="/docs/supported-data-types/">Supported Data Types</a></li>
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- <li class="toctree-l3"><a class="reference internal" href="/docs/date-time-and-timestamp/">Date, Time, and Timestamp</a></li>
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- <li class="toctree-l3"><a class="reference internal" href="/docs/handling-different-data-types/">Handling Different Data Types</a></li>
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- </ul>
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- <li class="toctree-l2"><a class="reference internal" href="/docs/lexical-structure/">Lexical Structure</a></li>
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- <li class="toctree-l2"><a class="reference internal" href="/docs/operators/">Operators</a></li>
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- <li class="toctree-l2"><a href="javascript: void(0);">SQL Functions</a></li>
- <ul style="display: none">
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- <li class="toctree-l3"><a class="reference internal" href="/docs/about-sql-function-examples/">About SQL Function Examples</a></li>
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- <li class="toctree-l3"><a class="reference internal" href="/docs/math-and-trig/">Math and Trig</a></li>
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- <li class="toctree-l3"><a class="reference internal" href="/docs/data-type-conversion/">Data Type Conversion</a></li>
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- <li class="toctree-l3"><a class="reference internal" href="/docs/date-time-functions-and-arithmetic/">Date/Time Functions and Arithmetic</a></li>
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- <li class="toctree-l3"><a class="reference internal" href="/docs/string-manipulation/">String Manipulation</a></li>
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- <li class="toctree-l3"><a class="reference internal" href="/docs/aggregate-and-aggregate-statistical/">Aggregate and Aggregate Statistical</a></li>
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- <li class="toctree-l3"><a class="reference internal" href="/docs/functions-for-handling-nulls/">Functions for Handling Nulls</a></li>
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- </ul>
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- <li class="toctree-l2"><a href="javascript: void(0);">Nested Data Functions</a></li>
- <ul style="display: none">
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- <li class="toctree-l3"><a class="reference internal" href="/docs/nested-data-limitations/">Nested Data Limitations</a></li>
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- <li class="toctree-l3"><a class="reference internal" href="/docs/flatten/">FLATTEN</a></li>
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- <li class="toctree-l3"><a class="reference internal" href="/docs/kvgen/">KVGEN</a></li>
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- <li class="toctree-l3"><a class="reference internal" href="/docs/repeated-count/">REPEATED_COUNT</a></li>
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- <li class="toctree-l3"><a class="reference internal" href="/docs/repeated-contains/">REPEATED_CONTAINS</a></li>
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- </ul>
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- <li class="toctree-l2"><a class="reference internal" href="/docs/query-directory-functions/">Query Directory Functions</a></li>
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- <li class="toctree-l2"><a href="javascript: void(0);">SQL Commands</a></li>
- <ul style="display: none">
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- <li class="toctree-l3"><a class="reference internal" href="/docs/supported-sql-commands/">Supported SQL Commands</a></li>
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- <li class="toctree-l3"><a class="reference internal" href="/docs/alter-session/">ALTER SESSION</a></li>
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- <li class="toctree-l3"><a class="reference internal" href="/docs/alter-system/">ALTER SYSTEM</a></li>
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- <li class="toctree-l3"><a class="reference internal" href="/docs/create-table-as-ctas/">CREATE TABLE AS (CTAS)</a></li>
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- <li class="toctree-l3"><a class="reference internal" href="/docs/create-view/">CREATE VIEW</a></li>
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- <li class="toctree-l3"><a class="reference internal" href="/docs/drop-view/">DROP VIEW</a></li>
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- <li class="toctree-l3"><a class="reference internal" href="/docs/describe/">DESCRIBE</a></li>
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- <li class="toctree-l3"><a class="reference internal" href="/docs/explain/">EXPLAIN</a></li>
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- <li class="toctree-l3"><a class="reference internal" href="/docs/select/">SELECT</a></li>
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- <li class="toctree-l3"><a class="reference internal" href="/docs/select-list/">SELECT List</a></li>
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- <li class="toctree-l3"><a class="reference internal" href="/docs/from-clause/">FROM Clause</a></li>
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- <li class="toctree-l3"><a class="reference internal" href="/docs/group-by-clause/">GROUP BY Clause</a></li>
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- <li class="toctree-l3"><a class="reference internal" href="/docs/having-clause/">HAVING Clause</a></li>
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- <li class="toctree-l3"><a class="reference internal" href="/docs/limit-clause/">LIMIT Clause</a></li>
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- <li class="toctree-l3"><a class="reference internal" href="/docs/offset-clause/">OFFSET Clause</a></li>
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- <li class="toctree-l3"><a class="reference internal" href="/docs/order-by-clause/">ORDER BY Clause</a></li>
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- <li class="toctree-l3"><a class="reference internal" href="/docs/union-set-operator/">UNION Set Operator</a></li>
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- <li class="toctree-l3"><a class="reference internal" href="/docs/where-clause/">WHERE Clause</a></li>
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- <li class="toctree-l3"><a class="reference internal" href="/docs/with-clause/">WITH Clause</a></li>
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- <li class="toctree-l3"><a class="reference internal" href="/docs/show-databases-and-show-schemas/">SHOW DATABASES and SHOW SCHEMAS</a></li>
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- <li class="toctree-l3"><a class="reference internal" href="/docs/show-files/">SHOW FILES</a></li>
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- <li class="toctree-l3"><a class="reference internal" href="/docs/show-tables/">SHOW TABLES</a></li>
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- <li class="toctree-l3"><a class="reference internal" href="/docs/use/">USE</a></li>
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- </ul>
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- <li class="toctree-l2"><a href="javascript: void(0);">SQL Conditional Expressions</a></li>
- <ul style="display: none">
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- <li class="toctree-l3"><a class="reference internal" href="/docs/case/">CASE</a></li>
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- </ul>
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- <li class="toctree-l2"><a class="reference internal" href="/docs/reserved-keywords/">Reserved Keywords</a></li>
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- <li class="toctree-l2"><a class="reference internal" href="/docs/sql-extensions/">SQL Extensions</a></li>
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- </ul>
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- <li class="toctree-l1"><a href="javascript: void(0);">Data Sources and File Formats</a></li>
- <ul style="display: none">
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- <li class="toctree-l2"><a class="reference internal" href="/docs/data-sources-and-file-formats-introduction/">Data Sources and File Formats Introduction</a></li>
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- <li class="toctree-l2"><a class="reference internal" href="/docs/hive-to-drill-data-type-mapping/">Hive-to-Drill Data Type Mapping</a></li>
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- <li class="toctree-l2"><a class="reference internal" href="/docs/deploying-and-using-a-hive-udf/">Deploying and Using a Hive UDF</a></li>
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- <li class="toctree-l2"><a class="reference internal" href="/docs/parquet-format/">Parquet Format</a></li>
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- <li class="toctree-l2"><a class="reference internal" href="/docs/json-data-model/">JSON Data Model</a></li>
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- </ul>
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- <li class="toctree-l1"><a href="javascript: void(0);">Develop Custom Functions</a></li>
- <ul style="display: none">
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- <li class="toctree-l2"><a class="reference internal" href="/docs/develop-custom-functions-introduction/">Develop Custom Functions Introduction</a></li>
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- <li class="toctree-l2"><a class="reference internal" href="/docs/develop-a-simple-function/">Develop a Simple Function</a></li>
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- <li class="toctree-l2"><a class="reference internal" href="/docs/developing-an-aggregate-function/">Developing an Aggregate Function</a></li>
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- <li class="toctree-l2"><a class="reference internal" href="/docs/adding-custom-functions-to-drill/">Adding Custom Functions to Drill</a></li>
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- <li class="toctree-l2"><a class="reference internal" href="/docs/using-custom-functions-in-queries/">Using Custom Functions in Queries</a></li>
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- <li class="toctree-l2"><a class="reference internal" href="/docs/custom-function-interfaces/">Custom Function Interfaces</a></li>
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- </ul>
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- <li class="toctree-l1"><a class="reference internal" href="/docs/troubleshooting/">Troubleshooting</a></li>
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- <ul style="display: none">
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- <li class="toctree-l2"><a href="javascript: void(0);">Develop Drill</a></li>
- <ul style="display: none">
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- <li class="toctree-l3"><a class="reference internal" href="/docs/compiling-drill-from-source/">Compiling Drill from Source</a></li>
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- <li class="toctree-l3"><a class="reference internal" href="/docs/drill-patch-review-tool/">Drill Patch Review Tool</a></li>
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- </ul>
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- <li class="toctree-l2"><a href="javascript: void(0);">Contribute to Drill</a></li>
- <ul style="display: none">
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- <li class="toctree-l3"><a class="reference internal" href="/docs/apache-drill-contribution-guidelines/">Apache Drill Contribution Guidelines</a></li>
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- <li class="toctree-l3"><a class="reference internal" href="/docs/apache-drill-contribution-ideas/">Apache Drill Contribution Ideas</a></li>
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- </ul>
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- <li class="toctree-l2"><a href="javascript: void(0);">Design Docs</a></li>
- <ul style="display: none">
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- <li class="toctree-l3"><a class="reference internal" href="/docs/drill-plan-syntax/">Drill Plan Syntax</a></li>
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- <li class="toctree-l3"><a class="reference internal" href="/docs/rpc-overview/">RPC Overview</a></li>
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- <li class="toctree-l3"><a class="reference internal" href="/docs/query-stages/">Query Stages</a></li>
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- <li class="toctree-l3"><a class="reference internal" href="/docs/useful-research/">Useful Research</a></li>
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- <li class="toctree-l3"><a class="reference internal" href="/docs/value-vectors/">Value Vectors</a></li>
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- </ul>
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- </ul>
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- <li class="toctree-l1"><a href="javascript: void(0);">Release Notes</a></li>
- <ul style="display: none">
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- <li class="toctree-l2"><a class="reference internal" href="/docs/apache-drill-0-5-0-release-notes/">Apache Drill 0.5.0 Release Notes</a></li>
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- <li class="toctree-l2"><a class="reference internal" href="/docs/apache-drill-0-4-0-release-notes/">Apache Drill 0.4.0 Release Notes</a></li>
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- <li class="toctree-l2"><a class="reference internal" href="/docs/apache-drill-m1-release-notes-apache-drill-alpha/">Apache Drill M1 Release Notes (Apache Drill Alpha)</a></li>
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- <li class="toctree-l2"><a class="reference internal" href="/docs/using-apache-drill-with-tableau-9-desktop/">Using Apache Drill with Tableau 9 Desktop</a></li>
-
-
-
- <li class="toctree-l2"><a class="reference internal" href="/docs/using-apache-drill-with-tableau-9-server/">Using Apache Drill with Tableau 9 Server</a></li>
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-
- </ul>
-
-
-
- <li class="toctree-l1"><a href="javascript: void(0);">Query Data</a></li>
- <ul style="display: none">
-
-
- <li class="toctree-l2"><a class="reference internal" href="/docs/query-data-introduction/">Query Data Introduction</a></li>
-
-
-
- <li class="toctree-l2"><a href="javascript: void(0);">Querying a File System</a></li>
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-
- <li class="toctree-l3"><a class="reference internal" href="/docs/querying-a-file-system-introduction/">Querying a File System Introduction</a></li>
-
- <li class="toctree-l3"><a class="reference internal" href="/docs/querying-json-files/">Querying JSON Files</a></li>
-
- <li class="toctree-l3"><a class="reference internal" href="/docs/querying-parquet-files/">Querying Parquet Files</a></li>
-
- <li class="toctree-l3"><a class="reference internal" href="/docs/querying-plain-text-files/">Querying Plain Text Files</a></li>
-
- <li class="toctree-l3"><a class="reference internal" href="/docs/querying-directories/">Querying Directories</a></li>
-
- </ul>
-
-
-
- <li class="toctree-l2"><a class="reference internal" href="/docs/querying-hbase/">Querying HBase</a></li>
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- <li class="toctree-l3"><a class="reference internal" href="/docs/querying-complex-data-introduction/">Querying Complex Data Introduction</a></li>
-
- <li class="toctree-l3"><a class="reference internal" href="/docs/sample-data-donuts/">Sample Data: Donuts</a></li>
-
- <li class="toctree-l3"><a class="reference internal" href="/docs/selecting-flat-data/">Selecting Flat Data</a></li>
-
- <li class="toctree-l3"><a class="reference internal" href="/docs/using-sql-functions-clauses-and-joins/">Using SQL Functions, Clauses, and Joins</a></li>
-
- <li class="toctree-l3"><a class="reference internal" href="/docs/selecting-nested-data-for-a-column/">Selecting Nested Data for a Column</a></li>
-
- <li class="toctree-l3"><a class="reference internal" href="/docs/selecting-multiple-columns-within-nested-data/">Selecting Multiple Columns Within Nested Data</a></li>
-
- </ul>
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-
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- <li class="toctree-l2"><a class="reference internal" href="/docs/querying-hive/">Querying Hive</a></li>
-
-
-
- <li class="toctree-l2"><a class="reference internal" href="/docs/querying-the-information-schema/">Querying the INFORMATION SCHEMA</a></li>
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-
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- <li class="toctree-l2"><a class="reference internal" href="/docs/querying-system-tables/">Querying System Tables</a></li>
-
-
-
- <li class="toctree-l2"><a class="reference internal" href="/docs/monitoring-and-canceling-queries-in-the-drill-web-ui/">Monitoring and Canceling Queries in the Drill Web UI</a></li>
-
-
- </ul>
-
-
-
- <li class="toctree-l1"><a href="javascript: void(0);">Performance Tuning</a></li>
- <ul style="display: none">
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- <li class="toctree-l2"><a class="reference internal" href="/docs/performance-tuning-introduction/">Performance Tuning Introduction</a></li>
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-
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- <li class="toctree-l2"><a class="reference internal" href="/docs/choosing-a-storage-format/">Choosing a Storage Format</a></li>
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- <li class="toctree-l2"><a href="javascript: void(0);">Query Plans and Tuning</a></li>
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- <li class="toctree-l3"><a class="reference internal" href="/docs/query-plans-and-tuning-introduction/">Query Plans and Tuning Introduction</a></li>
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- <li class="toctree-l3"><a class="reference internal" href="/docs/join-planning-guidelines/">Join Planning Guidelines</a></li>
-
- <li class="toctree-l3"><a class="reference internal" href="/docs/guidelines-for-optimizing-aggregation/">Guidelines for Optimizing Aggregation</a></li>
-
- <li class="toctree-l3"><a class="reference internal" href="/docs/modifying-query-planning-options/">Modifying Query Planning Options</a></li>
-
- <li class="toctree-l3"><a class="reference internal" href="/docs/sort-based-and-hash-based-memory-constrained-operators/">Sort-Based and Hash-Based Memory-Constrained Operators</a></li>
-
- <li class="toctree-l3"><a class="reference internal" href="/docs/enabling-query-queuing/">Enabling Query Queuing</a></li>
-
- <li class="toctree-l3"><a class="reference internal" href="/docs/controlling-parallelization-to-balance-performance-with-multi-tenancy/">Controlling Parallelization to Balance Performance with Multi-Tenancy</a></li>
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- </ul>
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-
-
- <li class="toctree-l2"><a href="javascript: void(0);">Identifying Performance Issues</a></li>
- <ul style="display: none">
-
- <li class="toctree-l3"><a class="reference internal" href="/docs/query-plans/">Query Plans</a></li>
-
- <li class="toctree-l3"><a class="reference internal" href="/docs/query-profiles/">Query Profiles</a></li>
-
- </ul>
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- <li class="toctree-l2"><a href="javascript: void(0);">Performance Tuning Reference</a></li>
- <ul style="display: none">
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- <li class="toctree-l3"><a class="reference internal" href="/docs/query-profile-column-descriptions/">Query Profile Column Descriptions</a></li>
-
- <li class="toctree-l3"><a class="reference internal" href="/docs/physical-operators/">Physical Operators</a></li>
-
- </ul>
-
-
- </ul>
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- <li class="toctree-l1"><a href="javascript: void(0);">Log and Debug</a></li>
- <ul style="display: none">
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- <li class="toctree-l2"><a class="reference internal" href="/docs/log-and-debug-introduction/">Log and Debug Introduction</a></li>
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- <li class="toctree-l2"><a class="reference internal" href="/docs/modify-logback-xml/">Modify logback.xml</a></li>
-
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- <li class="toctree-l2"><a class="reference internal" href="/docs/review-the-java-stack-trace/">Review the Java Stack Trace</a></li>
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-
- </ul>
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- <li class="toctree-l1"><a href="javascript: void(0);">Query Audit Logging</a></li>
- <ul style="display: none">
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- <li class="toctree-l2"><a class="reference internal" href="/docs/getting-query-information/">Getting Query Information</a></li>
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-
- </ul>
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- <li class="toctree-l1"><a href="javascript: void(0);">SQL Reference</a></li>
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- <li class="toctree-l3"><a class="reference internal" href="/docs/handling-different-data-types/">Handling Different Data Types</a></li>
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- </ul>
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- <li class="toctree-l2"><a class="reference internal" href="/docs/lexical-structure/">Lexical Structure</a></li>
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- <li class="toctree-l3"><a class="reference internal" href="/docs/data-type-conversion/">Data Type Conversion</a></li>
-
- <li class="toctree-l3"><a class="reference internal" href="/docs/date-time-functions-and-arithmetic/">Date/Time Functions and Arithmetic</a></li>
-
- <li class="toctree-l3"><a class="reference internal" href="/docs/string-manipulation/">String Manipulation</a></li>
-
- <li class="toctree-l3"><a class="reference internal" href="/docs/aggregate-and-aggregate-statistical/">Aggregate and Aggregate Statistical</a></li>
-
- <li class="toctree-l3"><a class="reference internal" href="/docs/functions-for-handling-nulls/">Functions for Handling Nulls</a></li>
-
- </ul>
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-
- <li class="toctree-l2"><a href="javascript: void(0);">Nested Data Functions</a></li>
- <ul style="display: none">
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- <li class="toctree-l3"><a class="reference internal" href="/docs/nested-data-limitations/">Nested Data Limitations</a></li>
-
- <li class="toctree-l3"><a class="reference internal" href="/docs/flatten/">FLATTEN</a></li>
-
- <li class="toctree-l3"><a class="reference internal" href="/docs/kvgen/">KVGEN</a></li>
-
- <li class="toctree-l3"><a class="reference internal" href="/docs/repeated-count/">REPEATED_COUNT</a></li>
-
- <li class="toctree-l3"><a class="reference internal" href="/docs/repeated-contains/">REPEATED_CONTAINS</a></li>
-
- </ul>
-
-
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- <li class="toctree-l2"><a class="reference internal" href="/docs/query-directory-functions/">Query Directory Functions</a></li>
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- <ul style="display: none">
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- <li class="toctree-l3"><a class="reference internal" href="/docs/supported-sql-commands/">Supported SQL Commands</a></li>
-
- <li class="toctree-l3"><a class="reference internal" href="/docs/alter-session/">ALTER SESSION</a></li>
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- <li class="toctree-l3"><a class="reference internal" href="/docs/alter-system/">ALTER SYSTEM</a></li>
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- <li class="toctree-l3"><a class="reference internal" href="/docs/create-table-as-ctas/">CREATE TABLE AS (CTAS)</a></li>
-
- <li class="toctree-l3"><a class="reference internal" href="/docs/create-view/">CREATE VIEW</a></li>
-
- <li class="toctree-l3"><a class="reference internal" href="/docs/drop-view/">DROP VIEW</a></li>
-
- <li class="toctree-l3"><a class="reference internal" href="/docs/describe/">DESCRIBE</a></li>
-
- <li class="toctree-l3"><a class="reference internal" href="/docs/explain/">EXPLAIN</a></li>
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- <li class="toctree-l3"><a class="reference internal" href="/docs/select/">SELECT</a></li>
-
- <li class="toctree-l3"><a class="reference internal" href="/docs/select-list/">SELECT List</a></li>
-
- <li class="toctree-l3"><a class="reference internal" href="/docs/from-clause/">FROM Clause</a></li>
-
- <li class="toctree-l3"><a class="reference internal" href="/docs/group-by-clause/">GROUP BY Clause</a></li>
-
- <li class="toctree-l3"><a class="reference internal" href="/docs/having-clause/">HAVING Clause</a></li>
-
- <li class="toctree-l3"><a class="reference internal" href="/docs/limit-clause/">LIMIT Clause</a></li>
-
- <li class="toctree-l3"><a class="reference internal" href="/docs/offset-clause/">OFFSET Clause</a></li>
-
- <li class="toctree-l3"><a class="reference internal" href="/docs/order-by-clause/">ORDER BY Clause</a></li>
-
- <li class="toctree-l3"><a class="reference internal" href="/docs/union-set-operator/">UNION Set Operator</a></li>
-
- <li class="toctree-l3"><a class="reference internal" href="/docs/where-clause/">WHERE Clause</a></li>
-
- <li class="toctree-l3"><a class="reference internal" href="/docs/with-clause/">WITH Clause</a></li>
-
- <li class="toctree-l3"><a class="reference internal" href="/docs/show-databases-and-show-schemas/">SHOW DATABASES and SHOW SCHEMAS</a></li>
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- <li class="toctree-l1"><a href="javascript: void(0);">Data Sources and File Formats</a></li>
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- <li class="toctree-l2"><a class="reference internal" href="/docs/data-sources-and-file-formats-introduction/">Data Sources and File Formats Introduction</a></li>
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- <li class="toctree-l2"><a class="reference internal" href="/docs/parquet-format/">Parquet Format</a></li>
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- <li class="toctree-l2"><a class="reference internal" href="/docs/json-data-model/">JSON Data Model</a></li>
-
-
- </ul>
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- <li class="toctree-l1"><a href="javascript: void(0);">Develop Custom Functions</a></li>
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- <li class="toctree-l2"><a class="reference internal" href="/docs/develop-custom-functions-introduction/">Develop Custom Functions Introduction</a></li>
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- <li><a href="/docs/using-odbc-on-linux-and-mac-os-x/">Using ODBC on Linux and Mac OS X</a></li>
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- <li>Advanced Properties</li>
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- <div class="main-content">
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- <a class="edit-link" href="https://github.com/apache/drill/blob/gh-pages/_docs/odbc-jdbc-interfaces/using-odbc-on-linux-and-mac-os-x/060-advanced-properties.md" target="_blank"><i class="fa fa-pencil-square-o"></i></a>
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- <div class="int_title left">
- <h1>Advanced Properties</h1>
-
- </div>
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- <link href="/css/docpage.css" rel="stylesheet" type="text/css">
-
- <div class="int_text" align="left">
-
- <p>When you use advanced properties on Linux and Mac OS X, you must separate them using a semi-colon
-(;).</p>
-
-<p>For example, the following Advanced Properties string excludes the schemas
-named <code>test</code> and <code>abc</code>; sets the timeout to 30 seconds; and sets the time zone
-to Coordinated Universal:</p>
-
-<p><code>Time:HandshakeTimeout=30;QueryTimeout=30;
-TimestampTZDisplayTimezone=utc;ExcludedSchemas=test,abc</code></p>
-
-<p>The following table lists and describes the advanced properties that you can
-set when using the MapR Drill ODBC Driver on Linux and Mac OS X.</p>
-
-<table><thead>
-<tr>
-<th>Property Name</th>
-<th>Default Value</th>
-<th>Description</th>
-</tr>
-</thead><tbody>
-<tr>
-<td>HandshakeTimeout</td>
-<td>5</td>
-<td>An integer value representing the number of seconds that the driver waits before aborting an attempt to connect to a data source. When set to a value of 0, the driver does not abort connection attempts.</td>
-</tr>
-<tr>
-<td>QueryTimeout</td>
-<td>180</td>
-<td>An integer value representing the number of seconds for the driver to wait before automatically stopping a query. When set to a value of 0, the driver does not stop queries automatically.</td>
-</tr>
-<tr>
-<td>TimestampTZDisplayTimezone</td>
-<td>local</td>
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- <p>Parquet metadata caching is an optional feature in Drill 1.2 and later. When you use this feature, Drill generates a metadata cache file. Drill stores the metadata cache file in a directory you specify and its subdirectories. When you run a query on this directory or a subdirectory, Drill reads a single metadata cache file instead of retrieving metadata from multiple Parquet files during the query-planning phase.</p>
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-<p>The scenarios in which metadata caching is useful is when the planning time is a significant percentage of the total elapsed time of the query. If the query execution time is the dominant factor then metadata caching will have very little impact. Before using this feature, run an EXPLAIN plan on your query and compare its time to the total time of query execution. Use these timings to determine whether metadata caching will be useful.</p>
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-<h2 id="how-to-trigger-generation-of-the-parquet-metadata-cache-file">How to Trigger Generation of the Parquet Metadata Cache File</h2>
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-<p>The following command generates the Parquet metadata cache file in the <code><path to table></code> and its subdirectories.</p>
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-<p><code>REFRESH TABLE METADATA <path to table></code></p>
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-<p>You need to run this command on a directory, nested or flat, only once during the session. Only the first query gathers the metadata unless the Parquet data changes, for example, you delete some data. If you did not make changes to the Parquet data, subsequent queries encounter the up-to-date Parquet metadata files. There is no need for Drill to regenerate the metadata. If there are changes, the metadata needs updating, so Drill regenerates the Parquet metadata when you issue the next query.</p>
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-<p>The elapsed time of the first query that triggers regeneration of metadata can be greater than that of subsequent queries that use that metadata.</p>
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-<h2 id="example-of-generating-parquet-metadata">Example of Generating Parquet Metadata</h2>
-<div class="highlight"><pre><code class="language-text" data-lang="text">0: jdbc:drill:schema=dfs> REFRESH TABLE METADATA t1;
-+-------+----------------------------------------------+
-| ok | summary |
-+-------+----------------------------------------------+
-| true | Successfully updated metadata for table t1. |
-+-------+----------------------------------------------+
-1 row selected (0.445 seconds)
-</code></pre></div>
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-<p>After running the REFRESH TABLE METADATA command, Drill traverses directories in the case of nested directories to find the Parquet files. From the footers of the files, Drill gathers metadata, such as row counts and node affinity based on HDFS block locations. For each directory level, Drill saves a summary of the information from the footers in a single Parquet metadata cache file. The summary at each level covers that particular level and all child levels; consequently, after generating metadata, you can query nested directories from any level. In order to leverage the metadata cache file for a table t, the file must exist at the root directory of that table. For example, you can query a subdirectory of Parquet files because Drill stores a Parquet metadata cache file at each level.</p>
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-<p>To run Drill in a clustered environment, complete the following steps:</p>
-
-<ol>
-<li>Install Drill on each designated node in the cluster.</li>
-<li>Configure a cluster ID and add Zookeeper information.</li>
-<li>Connect Drill to your data sources. </li>
-<li>Start Drill.</li>
-</ol>
-
-<h3 id="prerequisites">Prerequisites</h3>
-
-<p>Before you install Apache Drill on nodes in your cluster, you must have the
-following software and services installed:</p>
-
-<ul>
-<li><a href="http://www.oracle.com/technetwork/java/javase/downloads/jdk7-downloads-1880260.html">Oracle JDK version 7</a></li>
-<li>Configured and running ZooKeeper quorum</li>
-<li>Configured and running Hadoop cluster (Recommended)</li>
-<li>DNS (Recommended)</li>
-</ul>
-
-<h3 id="installing-drill">Installing Drill</h3>
-
-<p>Complete the following steps to install Drill on designated nodes:</p>
-
-<ol>
-<li><p>Download the Drill tarball.</p>
-<div class="highlight"><pre><code class="language-text" data-lang="text">curl http://getdrill.org/drill/download/apache-drill-0.8.0.tar.gz
-</code></pre></div></li>
-<li><p>Issue the following command to create a Drill installation directory and then explode the tarball to the directory:</p>
-<div class="highlight"><pre><code class="language-text" data-lang="text">mkdir /opt/drill
-tar xzf apache-drill-<version>.tar.gz --strip=1 -C /opt/drill
-</code></pre></div></li>
-<li><p>If you are using external JAR files, edit <code>drill-env.sh,</code>located in <code>/opt/drill/conf/</code>, and define <code>HADOOP_HOME:</code></p>
-<div class="highlight"><pre><code class="language-text" data-lang="text">export HADOOP_HOME="~/hadoop/hadoop-0.20.2/"
-</code></pre></div></li>
-<li><p>In <code>drill-override.conf,</code>create a unique Drill <code>cluster ID</code>, and provide Zookeeper host names and port numbers to configure a connection to your Zookeeper quorum.</p>
-
-<ol>
-<li>Edit <code>drill-override.conf</code>located in <code>~/drill/drill-<version>/conf/</code>.</li>
-<li>Provide a unique <code>cluster-id</code> and the Zookeeper host names and port numbers in <code>zk.connect</code>. If you install Drill on multiple nodes, assign the same <code>cluster ID</code> to each Drill node so that all Drill nodes share the same ID. The default Zookeeper port is 2181.</li>
-</ol></li>
-</ol>
-
-<p><strong>Example</strong></p>
-<div class="highlight"><pre><code class="language-text" data-lang="text">drill.exec: {
- cluster-id: "<mydrillcluster>",
- zk.connect: "<zkhostname1>:<port>,<zkhostname2>:<port>,<zkhostname3>:<port>",
- debug.error_on_leak: false,
- buffer.size: 6,
- functions: ["org.apache.drill.expr.fn.impl", "org.apache.drill.udfs"]
-}
-</code></pre></div>
-<h3 id="connecting-drill-to-data-sources">Connecting Drill to Data Sources</h3>
-
-<p>You can connect Drill to various types of data sources. Refer to <a href="/docs/connect-a-data-source-introduction">Connect
-Apache Drill to Data Sources</a> to get configuration instructions for the
-particular type of data source that you want to connect to Drill.</p>
-
-<h3 id="starting-drill">Starting Drill</h3>
-
-<p>Complete the following steps to start Drill:</p>
-
-<ol>
-<li><p>Navigate to the Drill installation directory, and issue the following command to start a Drillbit:</p>
-<div class="highlight"><pre><code class="language-text" data-lang="text">bin/drillbit.sh restart
-</code></pre></div></li>
-<li><p>Issue the following command to invoke SQLLine and start Drill:</p>
-<div class="highlight"><pre><code class="language-text" data-lang="text">bin/sqlline -u jdbc:drill:
-</code></pre></div>
-<p>When connected, the Drill prompt appears.<br>
- Example: <code>0: jdbc:drill:zk=<zk1host>:<port></code></p>
-
-<p>If you cannot connect to Drill, invoke SQLLine with the ZooKeeper quorum:</p>
-<div class="highlight"><pre><code class="language-text" data-lang="text"> bin/sqlline -u jdbc:drill:zk=<zk1host>:<port>,<zk2host>:<port>,<zk3host>:<port>
-</code></pre></div></li>
-<li><p>Issue the following query to Drill to verify that all Drillbits have joined the cluster:</p>
-<div class="highlight"><pre><code class="language-text" data-lang="text">0: jdbc:drill:zk=<zk1host>:<port> select * from sys.drillbits;
-</code></pre></div></li>
-</ol>
-
-<p>Drill provides a list of Drillbits that have joined.</p>
-<div class="highlight"><pre><code class="language-text" data-lang="text">+------------+------------+--------------+--------------------+
-| host | user_port | control_port | data_port |
-+------------+------------+--------------+--------------------+
-| <host address> | <port number>| <port number>| <port number>|
-+------------+------------+--------------+--------------------+
-</code></pre></div>
-<p><strong>Example</strong></p>
-
-<p>Now you can query data with Drill. The Drill installation includes sample data
-that you can query. Refer to <a href="/docs/querying-parquet-files/">Querying Parquet Files</a>.</p>
-
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- <li class="toctree-l2"><a class="reference internal" href="/docs/configuring-drill-memory/">Configuring Drill Memory</a></li>
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- <li class="toctree-l3"><a class="reference internal" href="/docs/configuring-a-multitenant-cluster-introduction/">Configuring a Multitenant Cluster Introduction</a></li>
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- <li class="toctree-l3"><a class="reference internal" href="/docs/configuring-multitenant-resources/">Configuring Multitenant Resources</a></li>
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- <li class="toctree-l3"><a class="reference internal" href="/docs/configuring-resources-for-a-shared-drillbit/">Configuring Resources for a Shared Drillbit</a></li>
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- </ul>
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- <li class="toctree-l2"><a class="reference internal" href="/docs/configuring-user-impersonation/">Configuring User Impersonation</a></li>
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- <li class="toctree-l3"><a class="reference internal" href="/docs/configuration-options-introduction/">Configuration Options Introduction</a></li>
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- <li class="toctree-l3"><a class="reference internal" href="/docs/start-up-options/">Start-Up Options</a></li>
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- <li class="toctree-l3"><a class="reference internal" href="/docs/planning-and-execution-options/">Planning and Execution Options</a></li>
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- <li class="toctree-l3"><a class="reference internal" href="/docs/persistent-configuration-storage/">Persistent Configuration Storage</a></li>
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- </ul>
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- <li class="toctree-l2"><a class="reference internal" href="/docs/ports-used-by-drill/">Ports Used by Drill</a></li>
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- <li class="toctree-l2"><a class="reference internal" href="/docs/partition-pruning/">Partition Pruning</a></li>
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- </ul>
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- <li class="toctree-l1"><a href="javascript: void(0);">Connect a Data Source</a></li>
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- <li class="toctree-l2"><a class="reference internal" href="/docs/connect-a-data-source-introduction/">Connect a Data Source Introduction</a></li>
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- <li class="toctree-l2"><a class="reference internal" href="/docs/storage-plugin-registration/">Storage Plugin Registration</a></li>
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- <li class="toctree-l2"><a href="javascript: void(0);">Storage Plugin Configuration</a></li>
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- <li class="toctree-l3"><a class="reference internal" href="/docs/plugin-configuration-introduction/">Plugin Configuration Introduction</a></li>
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- <li class="toctree-l3"><a class="reference internal" href="/docs/workspaces/">Workspaces</a></li>
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- <li class="toctree-l3"><a class="reference internal" href="/docs/file-system-storage-plugin/">File System Storage Plugin</a></li>
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- <li class="toctree-l3"><a class="reference internal" href="/docs/hbase-storage-plugin/">HBase Storage Plugin</a></li>
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- <li class="toctree-l3"><a class="reference internal" href="/docs/hive-storage-plugin/">Hive Storage Plugin</a></li>
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- <li class="toctree-l3"><a class="reference internal" href="/docs/drill-default-input-format/">Drill Default Input Format</a></li>
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- </ul>
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- <li class="toctree-l2"><a class="reference internal" href="/docs/mongodb-plugin-for-apache-drill/">MongoDB Plugin for Apache Drill</a></li>
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- <li class="toctree-l2"><a class="reference internal" href="/docs/mapr-db-format/">MapR-DB Format</a></li>
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- </ul>
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- <li class="toctree-l1"><a href="javascript: void(0);">ODBC/JDBC Interfaces</a></li>
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- <li class="toctree-l3"><a class="reference internal" href="/docs/odbc-on-linux-and-mac-introduction/">ODBC on Linux and Mac Introduction</a></li>
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- <li class="toctree-l3"><a class="reference internal" href="/docs/installing-the-driver-on-linux/">Installing the Driver on Linux</a></li>
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- <li class="toctree-l3"><a class="reference internal" href="/docs/installing-the-driver-on-mac-os-x/">Installing the Driver on Mac OS X</a></li>
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- <li class="toctree-l3"><a class="reference internal" href="/docs/configuring-connections-on-linux-and-mac-os-x/">Configuring Connections on Linux and Mac OS X</a></li>
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- <li class="toctree-l3"><a class="reference internal" href="/docs/driver-configuration-options/">Driver Configuration Options</a></li>
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- <li class="toctree-l3"><a class="reference internal" href="/docs/using-a-connection-string/">Using a Connection String</a></li>
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- <li class="toctree-l3"><a class="reference internal" href="/docs/advanced-properties/">Advanced Properties</a></li>
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- <li class="toctree-l3"><a class="reference internal" href="/docs/testing-the-odbc-connection/">Testing the ODBC Connection</a></li>
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- </ul>
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- <li class="toctree-l2"><a href="javascript: void(0);">Using ODBC on Windows</a></li>
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- <li class="toctree-l3"><a class="reference internal" href="/docs/installing-the-driver-on-windows/">Installing the Driver on Windows</a></li>
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- <li class="toctree-l3"><a class="reference internal" href="/docs/configuring-connections-on-windows/">Configuring Connections on Windows</a></li>
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- <li class="toctree-l3"><a class="reference internal" href="/docs/connecting-to-odbc-data-sources/">Connecting to ODBC Data Sources</a></li>
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- <li class="toctree-l3"><a class="reference internal" href="/docs/tableau-examples/">Tableau Examples</a></li>
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- <li class="toctree-l3"><a class="reference internal" href="/docs/using-drill-explorer-on-windows/">Using Drill Explorer on Windows</a></li>
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- </ul>
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- <li class="toctree-l2"><a class="reference internal" href="/docs/using-microstrategy-analytics-with-apache-drill/">Using MicroStrategy Analytics with Apache Drill</a></li>
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- <li class="toctree-l2"><a class="reference internal" href="/docs/using-tibco-spotfire-with-drill/">Using Tibco Spotfire with Drill</a></li>
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- <li class="toctree-l2"><a class="reference internal" href="/docs/using-apache-drill-with-tableau-9-desktop/">Using Apache Drill with Tableau 9 Desktop</a></li>
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- <li class="toctree-l2"><a class="reference internal" href="/docs/using-apache-drill-with-tableau-9-server/">Using Apache Drill with Tableau 9 Server</a></li>
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- </ul>
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- <li class="toctree-l3"><a class="reference internal" href="/docs/querying-a-file-system-introduction/">Querying a File System Introduction</a></li>
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- <li class="toctree-l3"><a class="reference internal" href="/docs/querying-json-files/">Querying JSON Files</a></li>
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- <li class="toctree-l3"><a class="reference internal" href="/docs/querying-parquet-files/">Querying Parquet Files</a></li>
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- <li class="toctree-l3"><a class="reference internal" href="/docs/querying-plain-text-files/">Querying Plain Text Files</a></li>
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- <li class="toctree-l3"><a class="reference internal" href="/docs/querying-directories/">Querying Directories</a></li>
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- </ul>
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- <li class="toctree-l2"><a class="reference internal" href="/docs/querying-hbase/">Querying HBase</a></li>
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- <li class="toctree-l2"><a href="javascript: void(0);">Querying Complex Data</a></li>
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- <li class="toctree-l3"><a class="reference internal" href="/docs/querying-complex-data-introduction/">Querying Complex Data Introduction</a></li>
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- <li class="toctree-l3"><a class="reference internal" href="/docs/sample-data-donuts/">Sample Data: Donuts</a></li>
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- <li class="toctree-l3"><a class="reference internal" href="/docs/selecting-flat-data/">Selecting Flat Data</a></li>
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- <li class="toctree-l3"><a class="reference internal" href="/docs/using-sql-functions-clauses-and-joins/">Using SQL Functions, Clauses, and Joins</a></li>
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- <li class="toctree-l3"><a class="reference internal" href="/docs/selecting-nested-data-for-a-column/">Selecting Nested Data for a Column</a></li>
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- <li class="toctree-l3"><a class="reference internal" href="/docs/selecting-multiple-columns-within-nested-data/">Selecting Multiple Columns Within Nested Data</a></li>
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- </ul>
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- <li class="toctree-l2"><a class="reference internal" href="/docs/querying-hive/">Querying Hive</a></li>
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- <li class="toctree-l2"><a class="reference internal" href="/docs/querying-the-information-schema/">Querying the INFORMATION SCHEMA</a></li>
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- <li class="toctree-l2"><a class="reference internal" href="/docs/querying-system-tables/">Querying System Tables</a></li>
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- <li class="toctree-l2"><a class="reference internal" href="/docs/monitoring-and-canceling-queries-in-the-drill-web-ui/">Monitoring and Canceling Queries in the Drill Web UI</a></li>
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- <li class="toctree-l3"><a class="reference internal" href="/docs/date-time-and-timestamp/">Date, Time, and Timestamp</a></li>
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- <li class="toctree-l3"><a class="reference internal" href="/docs/handling-different-data-types/">Handling Different Data Types</a></li>
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- <li class="toctree-l2"><a class="reference internal" href="/docs/lexical-structure/">Lexical Structure</a></li>
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- <li class="toctree-l3"><a class="reference internal" href="/docs/date-time-functions-and-arithmetic/">Date/Time Functions and Arithmetic</a></li>
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- <li class="toctree-l3"><a class="reference internal" href="/docs/string-manipulation/">String Manipulation</a></li>
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- <li class="toctree-l3"><a class="reference internal" href="/docs/aggregate-and-aggregate-statistical/">Aggregate and Aggregate Statistical</a></li>
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- <li class="toctree-l3"><a class="reference internal" href="/docs/functions-for-handling-nulls/">Functions for Handling Nulls</a></li>
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- </ul>
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- <li class="toctree-l2"><a href="javascript: void(0);">Nested Data Functions</a></li>
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- <li class="toctree-l3"><a class="reference internal" href="/docs/nested-data-limitations/">Nested Data Limitations</a></li>
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- <li class="toctree-l3"><a class="reference internal" href="/docs/flatten/">FLATTEN</a></li>
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- <li class="toctree-l3"><a class="reference internal" href="/docs/kvgen/">KVGEN</a></li>
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- <li class="toctree-l3"><a class="reference internal" href="/docs/repeated-count/">REPEATED_COUNT</a></li>
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- <li class="toctree-l3"><a class="reference internal" href="/docs/repeated-contains/">REPEATED_CONTAINS</a></li>
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- </ul>
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- <li class="toctree-l3"><a class="reference internal" href="/docs/alter-session-command/">ALTER SESSION Command</a></li>
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- <li class="toctree-l3"><a class="reference internal" href="/docs/alter-system-command/">ALTER SYSTEM Command</a></li>
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- <li class="toctree-l3"><a class="reference internal" href="/docs/create-table-as-ctas-command/">CREATE TABLE AS (CTAS) Command</a></li>
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- <li class="toctree-l3"><a class="reference internal" href="/docs/create-view-command/">CREATE VIEW Command</a></li>
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- <li class="toctree-l3 current"><a class="reference internal" href="/docs/describe-command/">DESCRIBE Command</a></li>
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- <li class="toctree-l3"><a class="reference internal" href="/docs/explain-commands/">EXPLAIN Commands</a></li>
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- <li class="toctree-l3"><a class="reference internal" href="/docs/select-statements/">SELECT Statements</a></li>
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- <li class="toctree-l3"><a class="reference internal" href="/docs/show-databases-and-show-schemas-command/">SHOW DATABASES and SHOW SCHEMAS Command</a></li>
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- <li class="toctree-l3"><a class="reference internal" href="/docs/show-files-command/">SHOW FILES Command</a></li>
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- <li class="toctree-l3"><a class="reference internal" href="/docs/show-tables-command/">SHOW TABLES Command</a></li>
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- <li class="toctree-l3"><a class="reference internal" href="/docs/use-command/">USE Command</a></li>
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- </ul>
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- <p>The DESCRIBE command returns information about columns in a table or view.</p>
-
-<h2 id="syntax">Syntax</h2>
-
-<p>The DESCRIBE command supports the following syntax:</p>
-<div class="highlight"><pre><code class="language-text" data-lang="text">DESCRIBE [workspace.]table_name|view_name
-</code></pre></div>
-<h2 id="usage-notes">Usage Notes</h2>
-
-<p>You can issue the DESCRIBE command against views created in a workspace and
-tables created in Hive, HBase, and MapR-DB. You can issue the DESCRIBE command
-on a table or view from any schema. For example, if you are working in the
-<code>dfs.myworkspace</code> schema, you can issue the DESCRIBE command on a view or
-table in another schema. Currently, DESCRIBE does not support tables created
-in a file system.</p>
-
-<p>Drill only supports SQL data types. Verify that all data types in an external
-data source, such as Hive or HBase, map to supported data types in Drill. See
-Drill Data Type Mapping for more information.</p>
-
-<h2 id="example">Example</h2>
-
-<p>The following example demonstrates the steps that you can follow when you want
-to use the DESCRIBE command to see column information for a view and for Hive
-and HBase tables.</p>
-
-<p>Complete the following steps to use the DESCRIBE command:</p>
-
-<ol>
-<li><p>Issue the USE command to switch to a particular schema.</p>
-<div class="highlight"><pre><code class="language-text" data-lang="text">0: jdbc:drill:zk=drilldemo:5181> use hive;
-+------------+------------+
-| ok | summary |
-+------------+------------+
-| true | Default schema changed to 'hive' |
-+------------+------------+
-1 row selected (0.025 seconds)
-</code></pre></div></li>
-<li><p>Issue the SHOW TABLES command to see the existing tables in the schema.</p>
-<div class="highlight"><pre><code class="language-text" data-lang="text">0: jdbc:drill:zk=drilldemo:5181> show tables;
-+--------------+------------+
-| TABLE_SCHEMA | TABLE_NAME |
-+--------------+------------+
-| hive.default | orders |
-| hive.default | products |
-+--------------+------------+
-2 rows selected (0.438 seconds)
-</code></pre></div></li>
-<li><p>Issue the DESCRIBE command on a table.</p>
-<div class="highlight"><pre><code class="language-text" data-lang="text">0: jdbc:drill:zk=drilldemo:5181> describe orders;
-+-------------+------------+-------------+
-| COLUMN_NAME | DATA_TYPE | IS_NULLABLE |
-+-------------+------------+-------------+
-| order_id | BIGINT | YES |
-| month | VARCHAR | YES |
-| purchdate | TIMESTAMP | YES |
-| cust_id | BIGINT | YES |
-| state | VARCHAR | YES |
-| prod_id | BIGINT | YES |
-| order_total | INTEGER | YES |
-+-------------+------------+-------------+
-7 rows selected (0.64 seconds)
-</code></pre></div></li>
-<li><p>Issue the DESCRIBE command on a table in another schema from the current schema.</p>
-<div class="highlight"><pre><code class="language-text" data-lang="text">0: jdbc:drill:zk=drilldemo:5181> describe hbase.customers;
-+-------------+------------+-------------+
-| COLUMN_NAME | DATA_TYPE | IS_NULLABLE |
-+-------------+------------+-------------+
-| row_key | ANY | NO |
-| address | (VARCHAR(1), ANY) MAP | NO |
-| loyalty | (VARCHAR(1), ANY) MAP | NO |
-| personal | (VARCHAR(1), ANY) MAP | NO |
-+-------------+------------+-------------+
-4 rows selected (0.671 seconds)
-</code></pre></div></li>
-<li><p>Issue the DESCRIBE command on a view in another schema from the current schema.</p>
-<div class="highlight"><pre><code class="language-text" data-lang="text">0: jdbc:drill:zk=drilldemo:5181> describe dfs.views.customers_vw;
-+-------------+------------+-------------+
-| COLUMN_NAME | DATA_TYPE | IS_NULLABLE |
-+-------------+------------+-------------+
-| cust_id | BIGINT | NO |
-| name | VARCHAR | NO |
-| address | VARCHAR | NO |
-| gender | VARCHAR | NO |
-| age | VARCHAR | NO |
-| agg_rev | VARCHAR | NO |
-| membership | VARCHAR | NO |
-+-------------+------------+-------------+
-7 rows selected (0.403 seconds)
-</code></pre></div></li>
-</ol>
-
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- <div class="doc-nav">
-
- <span class="previous-toc"><a href="/docs/create-view-command/">\u2190 CREATE VIEW Command</a></span><span class="next-toc"><a href="/docs/explain-commands/">EXPLAIN Commands \u2192</a></span>
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-
- <p>The ALTER SESSION command changes a system setting for the duration of a
-session. Session level settings override system level settings.</p>
-
-<h2 id="syntax">Syntax</h2>
-
-<p>The ALTER SESSION command supports the following syntax:</p>
-<div class="highlight"><pre><code class="language-text" data-lang="text">ALTER SESSION SET `<option_name>`=<value>;
-</code></pre></div>
-<h2 id="parameters">Parameters</h2>
-
-<p><em>option_name</em><br>
-This is the option name as it appears in the systems table.</p>
-
-<p><em>value</em><br>
-A value of the type listed in the sys.options table: number, string, boolean,
-or float. Use the appropriate value type for each option that you set.</p>
-
-<h2 id="usage-notes">Usage Notes</h2>
-
-<p>Use the ALTER SESSION command to set Drill query planning and execution
-options per session in a cluster. The options that you set using the ALTER
-SESSION command only apply to queries that run during the current Drill
-connection. A session ends when you quit the Drill shell. You can set any of
-the system level options at the session level.</p>
-
-<p>You can run the following query to see a complete list of planning and
-execution options that are currently set at the system or session level:</p>
-<div class="highlight"><pre><code class="language-text" data-lang="text">0: jdbc:drill:zk=local> SELECT name, type FROM sys.options WHERE type in ('SYSTEM','SESSION') order by name;
-+------------+----------------------------------------------+
-| name | type |
-+----------------------------------------------+------------+
-| drill.exec.functions.cast_empty_string_to_null | SYSTEM |
-| drill.exec.storage.file.partition.column.label | SYSTEM |
-| exec.errors.verbose | SYSTEM |
-| exec.java_compiler | SYSTEM |
-| exec.java_compiler_debug | SYSTEM |
-\u2026
-+------------+----------------------------------------------+
-</code></pre></div>
-<div class="admonition note">
- <p class="first admonition-title">Note</p>
- <p class="last">This is a truncated version of the list. </p>
-</div>
-
-<h2 id="example">Example</h2>
-
-<p>This example demonstrates how to use the ALTER SESSION command to set the
-<code>store.json.all_text_mode</code> option to \u201ctrue\u201d for the current Drill session.
-Setting this option to \u201ctrue\u201d enables text mode so that Drill reads everything
-in JSON as a text object instead of trying to interpret data types. This
-allows complicated JSON to be read using CASE and CAST.</p>
-<div class="highlight"><pre><code class="language-text" data-lang="text">0: jdbc:drill:zk=local> alter session set `store.json.all_text_mode`= true;
-+------------+------------+
-| ok | summary |
-+------------+------------+
-| true | store.json.all_text_mode updated. |
-+------------+------------+
-1 row selected (0.046 seconds)
-</code></pre></div>
-<p>You can issue a query to see all of the session level settings. Note that the
-option type is case-sensitive.</p>
-<div class="highlight"><pre><code class="language-text" data-lang="text">0: jdbc:drill:zk=local> SELECT name, type, bool_val FROM sys.options WHERE type = 'SESSION' order by name;
-+------------+------------+------------+
-| name | type | bool_val |
-+------------+------------+------------+
-| store.json.all_text_mode | SESSION | true |
-+------------+------------+------------+
-1 row selected (0.176 seconds)
-</code></pre></div>
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- <li class="toctree-l3"><a class="reference internal" href="/docs/data-type-conversion/">Data Type Conversion</a></li>
-
- <li class="toctree-l3"><a class="reference internal" href="/docs/date-time-functions-and-arithmetic/">Date/Time Functions and Arithmetic</a></li>
-
- <li class="toctree-l3"><a class="reference internal" href="/docs/string-manipulation/">String Manipulation</a></li>
-
- <li class="toctree-l3"><a class="reference internal" href="/docs/aggregate-and-aggregate-statistical/">Aggregate and Aggregate Statistical</a></li>
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- <li class="toctree-l3"><a class="reference internal" href="/docs/functions-for-handling-nulls/">Functions for Handling Nulls</a></li>
-
- </ul>
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- <li class="toctree-l2"><a href="javascript: void(0);">Nested Data Functions</a></li>
- <ul style="display: none">
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- <li class="toctree-l3"><a class="reference internal" href="/docs/nested-data-limitations/">Nested Data Limitations</a></li>
-
- <li class="toctree-l3"><a class="reference internal" href="/docs/flatten/">FLATTEN</a></li>
-
- <li class="toctree-l3"><a class="reference internal" href="/docs/kvgen/">KVGEN</a></li>
-
- <li class="toctree-l3"><a class="reference internal" href="/docs/repeated-count/">REPEATED_COUNT</a></li>
-
- <li class="toctree-l3"><a class="reference internal" href="/docs/repeated-contains/">REPEATED_CONTAINS</a></li>
-
- </ul>
-
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- <li class="toctree-l2"><a class="reference internal" href="/docs/query-directory-functions/">Query Directory Functions</a></li>
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- <ul style="display: none">
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- <li class="toctree-l3"><a class="reference internal" href="/docs/supported-sql-commands/">Supported SQL Commands</a></li>
-
- <li class="toctree-l3"><a class="reference internal" href="/docs/alter-session/">ALTER SESSION</a></li>
-
- <li class="toctree-l3"><a class="reference internal" href="/docs/alter-system/">ALTER SYSTEM</a></li>
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-
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- <li class="toctree-l3"><a class="reference internal" href="/docs/drop-view/">DROP VIEW</a></li>
-
- <li class="toctree-l3"><a class="reference internal" href="/docs/describe/">DESCRIBE</a></li>
-
- <li class="toctree-l3"><a class="reference internal" href="/docs/explain/">EXPLAIN</a></li>
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- <li class="toctree-l3"><a class="reference internal" href="/docs/select/">SELECT</a></li>
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-
- <li class="toctree-l3"><a class="reference internal" href="/docs/having-clause/">HAVING Clause</a></li>
-
- <li class="toctree-l3"><a class="reference internal" href="/docs/limit-clause/">LIMIT Clause</a></li>
-
- <li class="toctree-l3"><a class="reference internal" href="/docs/offset-clause/">OFFSET Clause</a></li>
-
- <li class="toctree-l3"><a class="reference internal" href="/docs/order-by-clause/">ORDER BY Clause</a></li>
-
- <li class="toctree-l3"><a class="reference internal" href="/docs/union-set-operator/">UNION Set Operator</a></li>
-
- <li class="toctree-l3"><a class="reference internal" href="/docs/where-clause/">WHERE Clause</a></li>
-
- <li class="toctree-l3"><a class="reference internal" href="/docs/with-clause/">WITH Clause</a></li>
-
- <li class="toctree-l3"><a class="reference internal" href="/docs/show-databases-and-show-schemas/">SHOW DATABASES and SHOW SCHEMAS</a></li>
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- <li class="toctree-l2"><a class="reference internal" href="/docs/data-sources-and-file-formats-introduction/">Data Sources and File Formats Introduction</a></li>
-
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- <li class="toctree-l2"><a class="reference internal" href="/docs/deploying-and-using-a-hive-udf/">Deploying and Using a Hive UDF</a></li>
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- <li class="toctree-l2"><a class="reference internal" href="/docs/parquet-format/">Parquet Format</a></li>
-
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-
- <li class="toctree-l2"><a class="reference internal" href="/docs/json-data-model/">JSON Data Model</a></li>
-
-
- </ul>
-
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- <li class="toctree-l1"><a href="javascript: void(0);">Develop Custom Functions</a></li>
- <ul style="display: none">
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- <li class="toctree-l2"><a class="reference internal" href="/docs/develop-custom-functions-introduction/">Develop Custom Functions Introduction</a></li>
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- <li class="toctree-l2"><a class="reference internal" href="/docs/develop-a-simple-function/">Develop a Simple Function</a></li>
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- <li class="toctree-l2"><a class="reference internal" href="/docs/developing-an-aggregate-function/">Developing an Aggregate Function</a></li>
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- <li class="toctree-l2"><a class="reference internal" href="/docs/adding-custom-functions-to-drill/">Adding Custom Functions to Drill</a></li>
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- <li class="toctree-l2"><a class="reference internal" href="/docs/using-custom-functions-in-queries/">Using Custom Functions in Queries</a></li>
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- <li class="toctree-l2"><a class="reference internal" href="/docs/custom-function-interfaces/">Custom Function Interfaces</a></li>
-
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- <li class="toctree-l3"><a class="reference internal" href="/docs/apache-drill-contribution-guidelines/">Apache Drill Contribution Guidelines</a></li>
-
- <li class="toctree-l3"><a class="reference internal" href="/docs/apache-drill-contribution-ideas/">Apache Drill Contribution Ideas</a></li>
-
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- <ul style="display: none">
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- <li class="toctree-l3"><a class="reference internal" href="/docs/drill-plan-syntax/">Drill Plan Syntax</a></li>
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-</aside>
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-<nav class="breadcrumbs">
- <li><a href="/docs/">Docs</a></li>
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- <li><a href="/docs/odbc-jdbc-interfaces/">ODBC/JDBC Interfaces</a></li>
-
- <li><a href="/docs/using-odbc-on-linux-and-mac-os-x/">Using ODBC on Linux and Mac OS X</a></li>
-
- <li>Configuring Connections on Linux and Mac OS X</li>
-</nav>
-
-<div class="main-content-wrapper">
- <div class="main-content">
-
-
- <a class="edit-link" href="https://github.com/apache/drill/blob/gh-pages/_docs/odbc-jdbc-interfaces/using-odbc-on-linux-and-mac-os-x/030-configuring-connections-on-linux-and-mac-os-x.md" target="_blank"><i class="fa fa-pencil-square-o"></i></a>
-
-
- <div class="int_title left">
- <h1>Configuring Connections on Linux and Mac OS X</h1>
-
- </div>
-
- <link href="/css/docpage.css" rel="stylesheet" type="text/css">
-
- <div class="int_text" align="left">
-
- <p>ODBC driver managers use configuration files to define and configure ODBC data
-sources and drivers. Before you connect to Drill through an ODBC client tool
-on Linux or Mac OS X, you must update the following configuration files:</p>
-
-<ul>
-<li><code>odbc.ini</code></li>
-<li><code>odbcinst.ini</code></li>
-<li><code>mapr.drillodbc.ini</code></li>
-</ul>
-
-<p>You can locate the configuration files in your home directory, or in<code>
-/opt/mapr/drillobdc/Setup</code>.</p>
-
-<div class="admonition note">
- <p class="first admonition-title">Note</p>
- <p class="last">The installer for the Mac OS X version of the driver creates a sample User DSN that some driver managers use in ~/Library/ODBC/odbc.ini and ~/.odbc.ini. </p>
-</div>
-
-<p>To configure an ODBC connection for Linux or Mac OS X, complete the following
-steps:</p>
-
-<ul>
-<li>Step 1: Set Evironment Variables (Linux only)</li>
-<li>Step 2: Define the ODBC Data Sources in odbc.ini</li>
-<li>Step 3: (Optional) Define the ODBC Driver in odbcinst.ini</li>
-<li>Step 4: Configure the MapR Drill ODBC Driver</li>
-</ul>
-
-<p>Once you have completed the required steps, refer to <a href="/docs/testing-the-odbc-connection">Testing the ODBC
-Connection on Linux and Mac OS X</a>.</p>
-
-<h2 id="sample-configuration-files">Sample Configuration Files</h2>
-
-<p>The driver installation contains sample configuration files in the ~/<code>Setup</code>
-directory that you can use as a reference.</p>
-
-<p>The sample files appear in the directory listings by default because the
-filenames do not begin with a (.) Filenames that begin with a (.) are hidden.
-If the default location is used for <code>odbc.ini</code> and <code>odbcinst.ini</code>, file names
-must begin with a period (.). For <code>mapr.drillodbc.ini</code>, the file name must
-begin with a (.) and must reside in your home directory.</p>
-
-<p>If the configuration files do not already exist in your home directory, copy
-the sample configuration files to that directory and rename them. If the
-configuration files already exist in your home directory, you can use the
-sample configuration files as a guide for modifying the existing configuration
-files.</p>
-
-<hr>
-
-<h2 id="step-1:-set-evironment-variables-(linux-only)">Step 1: Set Evironment Variables (Linux only)</h2>
-
-<p>You must set the following environment variables to point to the<code>odbc.ini</code>
-and <code>mapr.drillodbc.ini</code>configuration files, respectively:</p>
-
-<ul>
-<li><code>ODBCINI</code> (point to <code>odbc.ini</code>)</li>
-<li><code>MAPRDRILLINI</code> (point to <code>mapr.drillodbc.ini</code>)</li>
-</ul>
-
-<p>For example, if you are using the 32-bit driver and the files are in the
-default install directory, set the environment variables as follows:</p>
-
-<div class="admonition note">
- <p class="first admonition-title">Note</p>
- <p class="last">You do not need to set these variables for the Mac OS X version of the driver. </p>
-</div>
-
-<hr>
-
-<h2 id="step-2:-define-the-odbc-data-sources-in-odbc.ini">Step 2: Define the ODBC Data Sources in <code>odbc.ini</code></h2>
-
-<p>Define the ODBC data sources in the <code>odbc.ini</code> configuration file. This file
-is divided into sections.</p>
-
-<p>The following table provides information about each of the sections:</p>
-
-<table><thead>
-<tr>
-<th>Section</th>
-<th>Description</th>
-</tr>
-</thead><tbody>
-<tr>
-<td>[ODBC]</td>
-<td>(Optional) Controls the global ODBC configuration.</td>
-</tr>
-<tr>
-<td>[ODBC Data Sources]</td>
-<td>(Required) Lists DSNs and associates them with a driver.</td>
-</tr>
-<tr>
-<td>User Defined</td>
-<td>(Required) A section that you create. It must have the same name as the data source specified in the <code>[ODBC Data Sources]</code> section. This is required to configure the data source.</td>
-</tr>
-</tbody></table>
-
-<p>You can see the required sections in the following example <code>odbc.ini</code> file:</p>
-
-<p><strong>Example</strong></p>
-<div class="highlight"><pre><code class="language-text" data-lang="text">[ODBC]
-# Specify any global ODBC configuration here such as ODBC tracing.
-
-[ODBC Data Sources]
-Sample MapR Drill DSN=MapR Drill ODBC Driver
-
-[Sample MapR Drill DSN]
-# Description: DSN Description.
-# This key is not necessary and is only to give a description of the data source.
-Description=MapR Drill ODBC Driver DSN
-# Driver: The location where the ODBC driver is installed to.
-Driver=/opt/mapr/drillodbc/lib/universal/libmaprdrillodbc.dylib
-
-# Values for ConnectionType, AdvancedProperties, Catalog, Schema should be set here.
-# If ConnectionType is Direct, include Host and Port. If ConnectionType is ZooKeeper, include ZKQuorum and ZKClusterID
-# They can also be specified in the connection string.
-ConnectionType=Zookeeper
-HOST=[HOST]
-PORT=[PORT]
-ZKQuorum=
-ZKClusterID=
-AdvancedProperties={HandshakeTimeout=5;QueryTimeout=180;TimestampTZDisplayTimeout=utc;ExcludedSchemas=sys,INFORMATION_SCHEMA}
-Catalog=DRILL
-Schema=
-</code></pre></div>
-<h3 id="configuring-odbc.ini">Configuring odbc.ini</h3>
-
-<p>To create a data source in the <code>odbc.ini</code> configuration file, complete the
-following steps:</p>
-
-<ol>
-<li>Open the <code>.odbc.ini</code> configuration file in a text editor.</li>
-<li>Add a new entry to the <code>[ODBC Data Sources]</code> section, and type the data source name (DSN) and the driver name.</li>
-<li>To set configuration options, add a new section with a name that matches the data source name (DSN) that you specified in step 2. Specify configuration options as key-value pairs.</li>
-<li>Save the <code>.odbc.ini</code> configuration file.</li>
-</ol>
-
-<p>For details on the configuration options available for controlling the
-behavior of DSNs using Simba ODBC Driver for Apache Drill, see <a href="/docs/driver-configuration-options">Driver
-Configuration
-Options</a>.</p>
-
-<hr>
-
-<h2 id="step-3:-(optional)-define-the-odbc-driver-in-odbcinst.ini">Step 3: (Optional) Define the ODBC Driver in <code>odbcinst.ini</code></h2>
-
-<p>The <code>odbcinst.ini</code> is an optional configuration file that defines the ODBC
-Drivers. This configuration file is optional because you can specify drivers
-directly in the<code>odbc.ini</code> configuration file.</p>
-
-<p>The <code>odbcinst.ini</code> file is divided into sections.</p>
-
-<p>The following table provides information about each of the sections:</p>
-
-<table><thead>
-<tr>
-<th>Section</th>
-<th>Description</th>
-</tr>
-</thead><tbody>
-<tr>
-<td>[ODBC Drivers]</td>
-<td>This section lists the names of all the installed ODBC drivers.</td>
-</tr>
-<tr>
-<td>User Defined</td>
-<td>A section having the same name as the driver name specified in the [ODBC Drivers] section lists driver attributes and values.</td>
-</tr>
-</tbody></table>
-
-<p>You can see the sections in the following example <code>odbcinst.ini</code> file:</p>
-
-<p><strong>Example</strong></p>
-<div class="highlight"><pre><code class="language-text" data-lang="text">[ODBC Drivers]
-MapR Drill ODBC Driver=Installed
-
-[MapR Drill ODBC Driver]
-Description=MapR Drill ODBC Driver
-Driver=/opt/mapr/drillodbc/lib/universal/libmaprdrillodbc.dylib
-</code></pre></div>
-<h3 id="configuring-odbcinst.ini">Configuring odbcinst.ini</h3>
-
-<p>To define a driver in the <code>odbcinst.ini</code> configuration file, complete the
-following steps:</p>
-
-<ol>
-<li>Open the <code>odbcinst.ini</code> configuration file in a text editor.</li>
-<li>Add a new entry to the [ODBC Drivers] section. Type the driver name, and then type <code>=Installed</code>. Assign the driver name as the value of the Driver attribute in the data source definition instead of the driver shared library name.</li>
-<li>In <code>odbcinst.ini,</code> add a new section with a name that matches the driver name you typed in step 2, and add configuration options to the section based on the sample <code>odbcinst.ini</code> file provided with MapR Drill ODBC Driver in the Setup directory. Specify configuration options as key-value pairs.</li>
-<li>Save the <code>.odbcinst.ini</code> configuration file.</li>
-</ol>
-
-<hr>
-
-<h2 id="step-4:-configure-the-mapr-drill-odbc-driver">Step 4: Configure the MapR Drill ODBC Driver</h2>
-
-<p>Configure the MapR Drill ODBC Driver in the <code>mapr.drillodbc.ini</code> configuration
-file. This configures the driver so it works with your ODBC driver manager.</p>
-
-<h3 id="configuring-mapr.drillodbc.ini">Configuring mapr.drillodbc.ini</h3>
-
-<p>To configure the MapR Drill ODBC Driver in the <code>mapr.drillodbc.ini</code> configuration file, complete the following steps:</p>
-
-<ol>
-<li>Open the <code>mapr.drillodbc.ini</code> configuration file in a text editor.</li>
-<li>Edit the DriverManagerEncoding setting. The value is typically UTF-16 or UTF-32, but depends on the driver manger used. iODBC uses UTF-32 and unixODBC uses UTF-16. Review your ODBC Driver Manager documentation for the correct setting.</li>
-<li>Edit the <code>ODBCInstLib</code> setting. The value is the name of the <code>ODBCInst</code> shared library for the ODBC driver manager that you use. The configuration file defaults to the shared library for<code>iODBC</code>. In Linux, the shared library name for iODBC is <code>libiodbcinst.so</code>. In Mac OS X, the shared library name for <code>iODBC</code> is <code>libiodbcinst.dylib</code>.
- <div class="admonition note">
-<p class="first admonition-title">Note</p>
-<p class="last">Review your ODBC Driver Manager documentation for the correct
-setting. </p>
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-persists across all sessions. Session level settings override system level
-settings.</p>
-
-<h2 id="syntax">Syntax</h2>
-
-<p>The ALTER SYSTEM command supports the following syntax:</p>
-<div class="highlight"><pre><code class="language-text" data-lang="text">ALTER SYSTEM SET `<option_name>`=<value>;
-</code></pre></div>
-<h2 id="parameters">Parameters</h2>
-
-<p><em>option_name</em></p>
-
-<p>This is the option name as it appears in the systems table.</p>
-
-<p><em>value</em></p>
-
-<p>A value of the type listed in the sys.options table: number, string, boolean,
-or float. Use the appropriate value type for each option that you set.</p>
-
-<h2 id="usage-notes">Usage Notes</h2>
-
-<p>Use the ALTER SYSTEM command to permanently set Drill query planning and
-execution options per cluster. Options set at the system level affect the
-entire system and persist between restarts.</p>
-
-<p>You can run the following query to see a complete list of planning and
-execution options that you can set at the system level:</p>
-<div class="highlight"><pre><code class="language-text" data-lang="text">0: jdbc:drill:zk=local> select name, type, num_val, string_val, bool_val, float_val from sys.options where type like 'SYSTEM' order by name;
-+------------+------------+------------+------------+------------+------------+
-| name | type | num_val | string_val | bool_val | float_val |
-+------------+------------+------------+------------+------------+------------+
-| drill.exec.functions.cast_empty_string_to_null | SYSTEM | null | null | false | null |
-| drill.exec.storage.file.partition.column.label | SYSTEM | null | dir | null | null |
-| exec.errors.verbose | SYSTEM | null | null | false | null |
-| exec.java_compiler | SYSTEM | null | DEFAULT | null | null |
-| exec.java_compiler_debug | SYSTEM | null | null | true | null |
-| exec.java_compiler_janino_maxsize | SYSTEM | 262144 | null | null | null |
-| exec.queue.timeout_millis | SYSTEM | 400000 | null | null | null |
-| planner.add_producer_consumer | SYSTEM | null | null | true | null |
-| planner.affinity_factor | SYSTEM | null | null | null | 1.2 |
-| planner.broadcast_threshold | SYSTEM | 1000000 | null | null | null |
-| planner.disable_exchanges | SYSTEM | null | null | false | null |
-| planner.enable_broadcast_join | SYSTEM | null | null | true | null |
-| planner.enable_hash_single_key | SYSTEM | null | null | true | null |
-| planner.enable_hashagg | SYSTEM | null | null | true | null |
-| planner.enable_hashjoin | SYSTEM | null | null | true | null |
-| planner.slice_target | SYSTEM | 100000 | null | null | null |
-| planner.width.max_per_node | SYSTEM | 2 | null | null | null |
-| planner.width.max_per_query | SYSTEM | 1000 | null | null | null |
-| store.format | SYSTEM | null | parquet | null | null |
-| store.json.all_text_mode | SYSTEM | null | null | false | null |
-| store.mongo.all_text_mode | SYSTEM | null | null | false | null |
-| store.parquet.block-size | SYSTEM | 536870912 | null | null | null |
-| store.parquet.use_new_reader | SYSTEM | null | null | false | null |
-| store.parquet.vector_fill_check_threshold | SYSTEM | 10 | null | null | null |
-| store.parquet.vector_fill_threshold | SYSTEM | 85 | null | null | null |
-+------------+------------+------------+------------+------------+------------+
-</code></pre></div>
-<div class="admonition note">
- <p class="first admonition-title">Note</p>
- <p class="last">This is a truncated version of the list. </p>
-</div>
-
-<h2 id="example">Example</h2>
-
-<p>This example demonstrates how to use the ALTER SYSTEM command to set the
-<code>planner.add_producer_consumer</code> option to \u201ctrue.\u201d This option enables a
-secondary reading thread to prefetch data from disk.</p>
-<div class="highlight"><pre><code class="language-text" data-lang="text">0: jdbc:drill:zk=local> alter system set `planner.add_producer_consumer` = true;
-+------------+------------+
-| ok | summary |
-+------------+------------+
-| true | planner.add_producer_consumer updated. |
-+------------+------------+
-1 row selected (0.046 seconds)
-</code></pre></div>
-<p>You can issue a query to see all of the system level settings set to \u201ctrue.\u201d
-Note that the option type is case-sensitive.</p>
-<div class="highlight"><pre><code class="language-text" data-lang="text">0: jdbc:drill:zk=local> SELECT name, type, bool_val FROM sys.options WHERE type = 'SYSTEM' and bool_val=true;
-+------------+------------+------------+
-| name | type | bool_val |
-+------------+------------+------------+
-| exec.java_compiler_debug | SYSTEM | true |
-| planner.enable_mergejoin | SYSTEM | true |
-| planner.enable_broadcast_join | SYSTEM | true |
-| planner.enable_hashagg | SYSTEM | true |
-| planner.add_producer_consumer | SYSTEM | true |
-| planner.enable_hash_single_key | SYSTEM | true |
-| planner.enable_multiphase_agg | SYSTEM | true |
-| planner.enable_streamagg | SYSTEM | true |
-| planner.enable_hashjoin | SYSTEM | true |
-+------------+------------+------------+
-9 rows selected (0.159 seconds)
-</code></pre></div>
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- <li class="toctree-l2"><a class="reference internal" href="/docs/install-drill-introduction/">Install Drill Introduction</a></li>
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- <li class="toctree-l2"><a href="javascript: void(0);">Installing Drill in Embedded Mode</a></li>
- <ul style="display: none">
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- <li class="toctree-l3"><a class="reference internal" href="/docs/embedded-mode-prerequisites/">Embedded Mode Prerequisites</a></li>
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- <li class="toctree-l3"><a class="reference internal" href="/docs/installing-drill-on-linux-and-mac-os-x/">Installing Drill on Linux and Mac OS X</a></li>
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- <li class="toctree-l3"><a class="reference internal" href="/docs/starting-drill-on-linux-and-mac-os-x/">Starting Drill on Linux and Mac OS X</a></li>
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- <li class="toctree-l3"><a class="reference internal" href="/docs/installing-drill-on-windows/">Installing Drill on Windows</a></li>
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- <li class="toctree-l3"><a class="reference internal" href="/docs/starting-drill-on-windows/">Starting Drill on Windows</a></li>
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- </ul>
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- <li class="toctree-l2"><a href="javascript: void(0);">Installing Drill in Distributed Mode</a></li>
- <ul style="display: none">
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- <li class="toctree-l3"><a class="reference internal" href="/docs/distributed-mode-prerequisites/">Distributed Mode Prerequisites</a></li>
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- <li class="toctree-l3"><a class="reference internal" href="/docs/installing-drill-on-the-cluster/">Installing Drill on the Cluster</a></li>
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- <li class="toctree-l3"><a class="reference internal" href="/docs/starting-drill-in-distributed-mode/">Starting Drill in Distributed Mode</a></li>
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- </ul>
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- </ul>
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- <li class="toctree-l1"><a href="javascript: void(0);">Configure Drill</a></li>
- <ul style="display: none">
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- <li class="toctree-l2"><a class="reference internal" href="/docs/configure-drill-introduction/">Configure Drill Introduction</a></li>
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- <li class="toctree-l2"><a class="reference internal" href="/docs/configuring-drill-memory/">Configuring Drill Memory</a></li>
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- <li class="toctree-l2"><a href="javascript: void(0);">Configuring a Multitenant Cluster</a></li>
- <ul style="display: none">
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- <li class="toctree-l3"><a class="reference internal" href="/docs/configuring-a-multitenant-cluster-introduction/">Configuring a Multitenant Cluster Introduction</a></li>
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- <li class="toctree-l3"><a class="reference internal" href="/docs/configuring-multitenant-resources/">Configuring Multitenant Resources</a></li>
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- <li class="toctree-l3"><a class="reference internal" href="/docs/configuring-resources-for-a-shared-drillbit/">Configuring Resources for a Shared Drillbit</a></li>
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- </ul>
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- <li class="toctree-l2"><a class="reference internal" href="/docs/configuring-user-impersonation/">Configuring User Impersonation</a></li>
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- <li class="toctree-l2"><a class="reference internal" href="/docs/configuring-user-authentication/">Configuring User Authentication</a></li>
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- <li class="toctree-l2"><a href="javascript: void(0);">Configuration Options</a></li>
- <ul style="display: none">
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- <li class="toctree-l3"><a class="reference internal" href="/docs/configuration-options-introduction/">Configuration Options Introduction</a></li>
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- <li class="toctree-l3"><a class="reference internal" href="/docs/start-up-options/">Start-Up Options</a></li>
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- <li class="toctree-l3"><a class="reference internal" href="/docs/planning-and-execution-options/">Planning and Execution Options</a></li>
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- <li class="toctree-l3"><a class="reference internal" href="/docs/persistent-configuration-storage/">Persistent Configuration Storage</a></li>
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- </ul>
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- <li class="toctree-l2"><a class="reference internal" href="/docs/ports-used-by-drill/">Ports Used by Drill</a></li>
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- <li class="toctree-l2"><a class="reference internal" href="/docs/partition-pruning/">Partition Pruning</a></li>
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- </ul>
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- <li class="toctree-l1"><a href="javascript: void(0);">Connect a Data Source</a></li>
- <ul style="display: none">
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- <li class="toctree-l2"><a class="reference internal" href="/docs/connect-a-data-source-introduction/">Connect a Data Source Introduction</a></li>
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- <li class="toctree-l2"><a class="reference internal" href="/docs/storage-plugin-registration/">Storage Plugin Registration</a></li>
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- <li class="toctree-l2"><a href="javascript: void(0);">Storage Plugin Configuration</a></li>
- <ul style="display: none">
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- <li class="toctree-l3"><a class="reference internal" href="/docs/plugin-configuration-introduction/">Plugin Configuration Introduction</a></li>
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- <li class="toctree-l3"><a class="reference internal" href="/docs/workspaces/">Workspaces</a></li>
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- <li class="toctree-l3"><a class="reference internal" href="/docs/file-system-storage-plugin/">File System Storage Plugin</a></li>
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- <li class="toctree-l3"><a class="reference internal" href="/docs/hbase-storage-plugin/">HBase Storage Plugin</a></li>
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- <li class="toctree-l3"><a class="reference internal" href="/docs/hive-storage-plugin/">Hive Storage Plugin</a></li>
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- <li class="toctree-l3"><a class="reference internal" href="/docs/drill-default-input-format/">Drill Default Input Format</a></li>
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- </ul>
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- <li class="toctree-l2"><a class="reference internal" href="/docs/mongodb-plugin-for-apache-drill/">MongoDB Plugin for Apache Drill</a></li>
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- <li class="toctree-l2"><a class="reference internal" href="/docs/mapr-db-format/">MapR-DB Format</a></li>
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- </ul>
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- <li class="toctree-l1"><a href="javascript: void(0);">ODBC/JDBC Interfaces</a></li>
- <ul style="display: none">
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- <li class="toctree-l2"><a class="reference internal" href="/docs/interfaces-introduction/">Interfaces Introduction</a></li>
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- <li class="toctree-l2"><a class="reference internal" href="/docs/using-jdbc/">Using JDBC</a></li>
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- <li class="toctree-l2"><a href="javascript: void(0);">Using ODBC on Linux and Mac OS X</a></li>
- <ul style="display: none">
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- <li class="toctree-l3"><a class="reference internal" href="/docs/odbc-on-linux-and-mac-introduction/">ODBC on Linux and Mac Introduction</a></li>
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- <li class="toctree-l3"><a class="reference internal" href="/docs/installing-the-driver-on-linux/">Installing the Driver on Linux</a></li>
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- <li class="toctree-l3"><a class="reference internal" href="/docs/installing-the-driver-on-mac-os-x/">Installing the Driver on Mac OS X</a></li>
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- <li class="toctree-l3"><a class="reference internal" href="/docs/configuring-connections-on-linux-and-mac-os-x/">Configuring Connections on Linux and Mac OS X</a></li>
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- <li class="toctree-l3"><a class="reference internal" href="/docs/driver-configuration-options/">Driver Configuration Options</a></li>
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- <li class="toctree-l3"><a class="reference internal" href="/docs/using-a-connection-string/">Using a Connection String</a></li>
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- <li class="toctree-l3"><a class="reference internal" href="/docs/advanced-properties/">Advanced Properties</a></li>
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- <li class="toctree-l3"><a class="reference internal" href="/docs/testing-the-odbc-connection/">Testing the ODBC Connection</a></li>
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- </ul>
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- <li class="toctree-l2"><a href="javascript: void(0);">Using ODBC on Windows</a></li>
- <ul style="display: none">
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- <li class="toctree-l3"><a class="reference internal" href="/docs/installing-the-driver-on-windows/">Installing the Driver on Windows</a></li>
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- <li class="toctree-l3"><a class="reference internal" href="/docs/configuring-connections-on-windows/">Configuring Connections on Windows</a></li>
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- <li class="toctree-l3"><a class="reference internal" href="/docs/connecting-to-odbc-data-sources/">Connecting to ODBC Data Sources</a></li>
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- <li class="toctree-l3"><a class="reference internal" href="/docs/tableau-examples/">Tableau Examples</a></li>
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- <li class="toctree-l3"><a class="reference internal" href="/docs/using-drill-explorer-on-windows/">Using Drill Explorer on Windows</a></li>
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- </ul>
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-
- <li class="toctree-l2"><a class="reference internal" href="/docs/using-microstrategy-analytics-with-apache-drill/">Using MicroStrategy Analytics with Apache Drill</a></li>
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- <li class="toctree-l2"><a class="reference internal" href="/docs/using-tibco-spotfire-with-drill/">Using Tibco Spotfire with Drill</a></li>
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- <li class="toctree-l2"><a class="reference internal" href="/docs/using-apache-drill-with-tableau-9-desktop/">Using Apache Drill with Tableau 9 Desktop</a></li>
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- <li class="toctree-l2"><a class="reference internal" href="/docs/using-apache-drill-with-tableau-9-server/">Using Apache Drill with Tableau 9 Server</a></li>
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- </ul>
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- <li class="toctree-l1"><a href="javascript: void(0);">Query Data</a></li>
- <ul style="display: none">
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- <li class="toctree-l2"><a class="reference internal" href="/docs/query-data-introduction/">Query Data Introduction</a></li>
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- <li class="toctree-l2"><a href="javascript: void(0);">Querying a File System</a></li>
- <ul style="display: none">
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- <li class="toctree-l3"><a class="reference internal" href="/docs/querying-a-file-system-introduction/">Querying a File System Introduction</a></li>
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- <li class="toctree-l3"><a class="reference internal" href="/docs/querying-json-files/">Querying JSON Files</a></li>
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- <li class="toctree-l3"><a class="reference internal" href="/docs/querying-parquet-files/">Querying Parquet Files</a></li>
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- <li class="toctree-l3"><a class="reference internal" href="/docs/querying-plain-text-files/">Querying Plain Text Files</a></li>
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- <li class="toctree-l3"><a class="reference internal" href="/docs/querying-directories/">Querying Directories</a></li>
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- </ul>
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- <li class="toctree-l2"><a class="reference internal" href="/docs/querying-hbase/">Querying HBase</a></li>
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- <li class="toctree-l2"><a href="javascript: void(0);">Querying Complex Data</a></li>
- <ul style="display: none">
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- <li class="toctree-l3"><a class="reference internal" href="/docs/querying-complex-data-introduction/">Querying Complex Data Introduction</a></li>
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- <li class="toctree-l3"><a class="reference internal" href="/docs/sample-data-donuts/">Sample Data: Donuts</a></li>
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- <li class="toctree-l3"><a class="reference internal" href="/docs/selecting-flat-data/">Selecting Flat Data</a></li>
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- <li class="toctree-l3"><a class="reference internal" href="/docs/using-sql-functions-clauses-and-joins/">Using SQL Functions, Clauses, and Joins</a></li>
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- <li class="toctree-l3"><a class="reference internal" href="/docs/selecting-nested-data-for-a-column/">Selecting Nested Data for a Column</a></li>
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- <li class="toctree-l3"><a class="reference internal" href="/docs/selecting-multiple-columns-within-nested-data/">Selecting Multiple Columns Within Nested Data</a></li>
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- </ul>
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- <li class="toctree-l2"><a class="reference internal" href="/docs/querying-hive/">Querying Hive</a></li>
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- <li class="toctree-l2"><a class="reference internal" href="/docs/querying-the-information-schema/">Querying the INFORMATION SCHEMA</a></li>
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- <li class="toctree-l2"><a class="reference internal" href="/docs/querying-system-tables/">Querying System Tables</a></li>
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- <li class="toctree-l2"><a class="reference internal" href="/docs/monitoring-and-canceling-queries-in-the-drill-web-ui/">Monitoring and Canceling Queries in the Drill Web UI</a></li>
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- </ul>
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- <li class="toctree-l1"><a href="javascript: void(0);">SQL Reference</a></li>
- <ul style="display: none">
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- <li class="toctree-l2"><a class="reference internal" href="/docs/sql-reference-introduction/">SQL Reference Introduction</a></li>
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- <li class="toctree-l2"><a href="javascript: void(0);">Data Types</a></li>
- <ul style="display: none">
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- <li class="toctree-l3"><a class="reference internal" href="/docs/supported-data-types/">Supported Data Types</a></li>
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- <li class="toctree-l3"><a class="reference internal" href="/docs/date-time-and-timestamp/">Date, Time, and Timestamp</a></li>
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- <li class="toctree-l3"><a class="reference internal" href="/docs/handling-different-data-types/">Handling Different Data Types</a></li>
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- </ul>
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- <li class="toctree-l2"><a class="reference internal" href="/docs/lexical-structure/">Lexical Structure</a></li>
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- <li class="toctree-l2"><a class="reference internal" href="/docs/operators/">Operators</a></li>
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- <li class="toctree-l2"><a href="javascript: void(0);">SQL Functions</a></li>
- <ul style="display: none">
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- <li class="toctree-l3"><a class="reference internal" href="/docs/about-sql-function-examples/">About SQL Function Examples</a></li>
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- <li class="toctree-l3"><a class="reference internal" href="/docs/math-and-trig/">Math and Trig</a></li>
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- <li class="toctree-l3"><a class="reference internal" href="/docs/data-type-conversion/">Data Type Conversion</a></li>
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- <li class="toctree-l3"><a class="reference internal" href="/docs/date-time-functions-and-arithmetic/">Date/Time Functions and Arithmetic</a></li>
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- <li class="toctree-l3"><a class="reference internal" href="/docs/string-manipulation/">String Manipulation</a></li>
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- <li class="toctree-l3"><a class="reference internal" href="/docs/aggregate-and-aggregate-statistical/">Aggregate and Aggregate Statistical</a></li>
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- <li class="toctree-l3"><a class="reference internal" href="/docs/functions-for-handling-nulls/">Functions for Handling Nulls</a></li>
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- </ul>
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- <li class="toctree-l2"><a href="javascript: void(0);">Nested Data Functions</a></li>
- <ul style="display: none">
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- <li class="toctree-l3"><a class="reference internal" href="/docs/nested-data-limitations/">Nested Data Limitations</a></li>
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- <li class="toctree-l3"><a class="reference internal" href="/docs/flatten/">FLATTEN</a></li>
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- <li class="toctree-l3"><a class="reference internal" href="/docs/kvgen/">KVGEN</a></li>
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- <li class="toctree-l3"><a class="reference internal" href="/docs/repeated-count/">REPEATED_COUNT</a></li>
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- <li class="toctree-l3"><a class="reference internal" href="/docs/repeated-contains/">REPEATED_CONTAINS</a></li>
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- </ul>
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- <li class="toctree-l2"><a class="reference internal" href="/docs/query-directory-functions/">Query Directory Functions</a></li>
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- <li class="toctree-l2"><a href="javascript: void(0);">SQL Commands</a></li>
- <ul style="display: none">
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- <li class="toctree-l3"><a class="reference internal" href="/docs/supported-sql-commands/">Supported SQL Commands</a></li>
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- <li class="toctree-l3"><a class="reference internal" href="/docs/alter-session-command/">ALTER SESSION Command</a></li>
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- <li class="toctree-l3"><a class="reference internal" href="/docs/alter-system-command/">ALTER SYSTEM Command</a></li>
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- <li class="toctree-l3"><a class="reference internal" href="/docs/create-table-as-ctas-command/">CREATE TABLE AS (CTAS) Command</a></li>
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- <li class="toctree-l3"><a class="reference internal" href="/docs/create-view-command/">CREATE VIEW Command</a></li>
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- <li class="toctree-l3"><a class="reference internal" href="/docs/describe-command/">DESCRIBE Command</a></li>
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- <li class="toctree-l3"><a class="reference internal" href="/docs/explain-commands/">EXPLAIN Commands</a></li>
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- <li class="toctree-l3"><a class="reference internal" href="/docs/select-statements/">SELECT Statements</a></li>
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- <li class="toctree-l3"><a class="reference internal" href="/docs/show-databases-and-show-schemas-command/">SHOW DATABASES and SHOW SCHEMAS Command</a></li>
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- <li class="toctree-l3"><a class="reference internal" href="/docs/show-files-command/">SHOW FILES Command</a></li>
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- <li class="toctree-l3"><a class="reference internal" href="/docs/show-tables-command/">SHOW TABLES Command</a></li>
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- <li class="toctree-l3"><a class="reference internal" href="/docs/use-command/">USE Command</a></li>
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- </ul>
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- <li class="toctree-l2"><a href="javascript: void(0);">SQL Conditional Expressions</a></li>
- <ul style="display: none">
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- <li class="toctree-l3"><a class="reference internal" href="/docs/case/">CASE</a></li>
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- </ul>
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- <li class="toctree-l2"><a class="reference internal" href="/docs/reserved-keywords/">Reserved Keywords</a></li>
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- <li class="toctree-l2"><a class="reference internal" href="/docs/sql-extensions/">SQL Extensions</a></li>
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- </ul>
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- <li class="toctree-l1"><a href="javascript: void(0);">Data Sources and File Formats</a></li>
- <ul style="display: none">
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- <li class="toctree-l2"><a class="reference internal" href="/docs/data-sources-and-file-formats-introduction/">Data Sources and File Formats Introduction</a></li>
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- <li class="toctree-l2"><a class="reference internal" href="/docs/hive-to-drill-data-type-mapping/">Hive-to-Drill Data Type Mapping</a></li>
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- <li class="toctree-l2"><a class="reference internal" href="/docs/deploying-and-using-a-hive-udf/">Deploying and Using a Hive UDF</a></li>
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- <li class="toctree-l2"><a class="reference internal" href="/docs/parquet-format/">Parquet Format</a></li>
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- <li class="toctree-l2"><a class="reference internal" href="/docs/json-data-model/">JSON Data Model</a></li>
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- </ul>
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- <li class="toctree-l1"><a href="javascript: void(0);">Develop Custom Functions</a></li>
- <ul style="display: none">
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- <li class="toctree-l2"><a class="reference internal" href="/docs/develop-custom-functions-introduction/">Develop Custom Functions Introduction</a></li>
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- <li class="toctree-l2"><a class="reference internal" href="/docs/develop-a-simple-function/">Develop a Simple Function</a></li>
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- <li class="toctree-l2"><a class="reference internal" href="/docs/developing-an-aggregate-function/">Developing an Aggregate Function</a></li>
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- <li class="toctree-l2"><a class="reference internal" href="/docs/adding-custom-functions-to-drill/">Adding Custom Functions to Drill</a></li>
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- <li class="toctree-l2"><a class="reference internal" href="/docs/using-custom-functions-in-queries/">Using Custom Functions in Queries</a></li>
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- <li class="toctree-l2"><a class="reference internal" href="/docs/custom-function-interfaces/">Custom Function Interfaces</a></li>
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- </ul>
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- <li class="toctree-l1"><a href="javascript: void(0);">Developer Information</a></li>
- <ul style="display: none">
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- <li class="toctree-l2"><a href="javascript: void(0);">Develop Drill</a></li>
- <ul style="display: none">
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- <li class="toctree-l3"><a class="reference internal" href="/docs/compiling-drill-from-source/">Compiling Drill from Source</a></li>
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- <li class="toctree-l3"><a class="reference internal" href="/docs/drill-patch-review-tool/">Drill Patch Review Tool</a></li>
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- </ul>
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- <li class="toctree-l2"><a href="javascript: void(0);">Contribute to Drill</a></li>
- <ul style="display: none">
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- <li class="toctree-l3"><a class="reference internal" href="/docs/apache-drill-contribution-guidelines/">Apache Drill Contribution Guidelines</a></li>
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- <li class="toctree-l3"><a class="reference internal" href="/docs/apache-drill-contribution-ideas/">Apache Drill Contribution Ideas</a></li>
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- </ul>
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- <li class="toctree-l2"><a href="javascript: void(0);">Design Docs</a></li>
- <ul style="display: none">
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- <li class="toctree-l3"><a class="reference internal" href="/docs/drill-plan-syntax/">Drill Plan Syntax</a></li>
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- <li class="toctree-l3"><a class="reference internal" href="/docs/rpc-overview/">RPC Overview</a></li>
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- <li class="toctree-l3"><a class="reference internal" href="/docs/query-stages/">Query Stages</a></li>
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- <li class="toctree-l3"><a class="reference internal" href="/docs/useful-research/">Useful Research</a></li>
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- <li class="toctree-l3"><a class="reference internal" href="/docs/value-vectors/">Value Vectors</a></li>
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- </ul>
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- </ul>
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- <li class="toctree-l1"><a href="javascript: void(0);">Release Notes</a></li>
- <ul style="display: none">
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- <li class="toctree-l2"><a class="reference internal" href="/docs/apache-drill-0-5-0-release-notes/">Apache Drill 0.5.0 Release Notes</a></li>
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- <li class="toctree-l2"><a class="reference internal" href="/docs/apache-drill-0-4-0-release-notes/">Apache Drill 0.4.0 Release Notes</a></li>
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- <li class="toctree-l2"><a class="reference internal" href="/docs/apache-drill-m1-release-notes-apache-drill-alpha/">Apache Drill M1 Release Notes (Apache Drill Alpha)</a></li>
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- <li class="toctree-l2"><a class="reference internal" href="/docs/apache-drill-m1-release-notes-apache-drill-alpha/">Apache Drill M1 Release Notes (Apache Drill Alpha)</a></li>
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- <li class="toctree-l2"><a class="reference internal" href="/docs/apache-drill-0-6-0-release-notes/">Apache Drill 0.6.0 Release Notes</a></li>
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- <li class="toctree-l2"><a class="reference internal" href="/docs/apache-drill-0-7-0-release-notes/">Apache Drill 0.7.0 Release Notes</a></li>
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- <li class="toctree-l2"><a class="reference internal" href="/docs/apache-drill-0-8-0-release-notes/">Apache Drill 0.8.0 Release Notes</a></li>
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- <li class="toctree-l2"><a class="reference internal" href="/docs/apache-drill-0-9-0-release-notes/">Apache Drill 0.9.0 Release Notes</a></li>
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- </ul>
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- <li class="toctree-l1"><a href="javascript: void(0);">Sample Datasets</a></li>
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- <li class="toctree-l2"><a class="reference internal" href="/docs/aol-search/">AOL Search</a></li>
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- <li class="toctree-l2"><a class="reference internal" href="/docs/enron-emails/">Enron Emails</a></li>
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- <li class="toctree-l2"><a class="reference internal" href="/docs/wikipedia-edit-history/">Wikipedia Edit History</a></li>
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- </ul>
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- <p>The HAVING clause filters group rows created by the GROUP BY clause. The HAVING clause is applied to each group of the grouped table, much as a WHERE clause is applied to a select list. If there is no GROUP BY clause, the HAVING clause is applied to the entire result as a single group. The SELECT clause cannot refer directly to any column that does not have a GROUP BY clause.</p>
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-<h2 id="syntax">Syntax</h2>
-
-<p>The HAVING clause supports the following syntax: </p>
-
-<p><code>[ HAVING boolean_expression ]</code> </p>
-
-<h2 id="expression">Expression</h2>
-
-<p>A <em>boolean expression</em> can include one or more of the following operators: </p>
-
-<ul>
-<li>AND</li>
-<li>OR</li>
-<li>NOT</li>
-<li>IS NULL</li>
-<li>IS NOT NULL</li>
-<li>LIKE </li>
-<li>BETWEEN</li>
-<li>IN</li>
-<li>Comparison operators</li>
-<li>Quantified comparison operators<br></li>
-</ul>
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-<h2 id="usage-notes">Usage Notes</h2>
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-<ul>
-<li>Any column referenced in a HAVING clause must be either a grouping column or a column that refers to the result of an aggregate function.</li>
-<li>In a HAVING clause, you cannot specify:
-
-<ul>
-<li>An alias that was defined in the select list. You must repeat the original, unaliased expression. </li>
-<li>An ordinal number that refers to a select list item. Only the GROUP BY and ORDER BY clauses accept ordinal numbers.</li>
-</ul></li>
-</ul>
-
-<h2 id="examples">Examples</h2>
-
-<p>The following example query uses the HAVING clause to constrain an aggregate result. Drill queries the <code>dfs.clicks workspace</code> and returns the total number of clicks for devices that indicate high click-throughs: </p>
-<div class="highlight"><pre><code class="language-text" data-lang="text"> 0: jdbc:drill:> select t.user_info.device, count(*) from \`clicks/clicks.json\` t
- group by t.user_info.device having count(*) > 1000;
-
- +------------+------------+
- | EXPR$0 | EXPR$1 |
- +------------+------------+
- | IOS5 | 11814 |
- | AOS4.2 | 5986 |
- | IOS6 | 4464 |
- | IOS7 | 3135 |
- | AOS4.4 | 1562 |
- | AOS4.3 | 3039 |
- +------------+------------+
-</code></pre></div>
-<p>The aggregate is a count of the records for each different mobile device in the clickstream data. Only the activity for the devices that registered more than 1000 transactions qualify for the result set.</p>
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