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Posted to commits@tajo.apache.org by ji...@apache.org on 2016/02/04 01:29:12 UTC
svn commit: r1728394 [34/42] - in /tajo/site/docs: 0.11.1/ 0.11.1/_sources/
0.11.1/_sources/backup_and_restore/ 0.11.1/_sources/configuration/
0.11.1/_sources/functions/ 0.11.1/_sources/index/
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Added: tajo/site/docs/0.11.1/tsql/dfs_command.html
URL: http://svn.apache.org/viewvc/tajo/site/docs/0.11.1/tsql/dfs_command.html?rev=1728394&view=auto
==============================================================================
--- tajo/site/docs/0.11.1/tsql/dfs_command.html (added)
+++ tajo/site/docs/0.11.1/tsql/dfs_command.html Thu Feb 4 00:29:05 2016
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+<li class="toctree-l2"><a class="reference internal" href="../configuration/tajo-site-xml.html">The tajo-site.xml File</a></li>
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+<li class="toctree-l2 current"><a class="current reference internal" href="">Executing HDFS commands</a></li>
+<li class="toctree-l2"><a class="reference internal" href="variables.html">Session Variables</a></li>
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+<li class="toctree-l2"><a class="reference internal" href="intro.html">Introducing to TSQL</a></li>
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+ <div class="section" id="executing-hdfs-commands">
+<h1>Executing HDFS commands<a class="headerlink" href="#executing-hdfs-commands" title="Permalink to this headline">¶</a></h1>
+<p>You can run the hadoop dfs command (FsShell) within tsql. <code class="docutils literal"><span class="pre">\dfs</span></code> command provides a shortcut to the hadoop dfs commands. If you want to use this command, just specify FsShell arguments and add the semicolon at the end as follows:</p>
+<div class="highlight-sql"><div class="highlight"><pre>default> \dfs -ls /
+Found 3 items
+drwxr-xr-x - tajo supergroup 0 2014-08-14 04:04 /tajo
+drwxr-xr-x - tajo supergroup 0 2014-09-04 02:20 /tmp
+drwxr-xr-x - tajo supergroup 0 2014-09-16 13:41 /user
+
+default> \dfs -ls /tajo
+Found 2 items
+drwxr-xr-x - tajo supergroup 0 2014-08-14 04:04 /tajo/system
+drwxr-xr-x - tajo supergroup 0 2014-08-14 04:15 /tajo/warehouse
+
+default> \dfs -mkdir /tajo/temp
+
+default> \dfs -ls /tajo
+Found 3 items
+drwxr-xr-x - tajo supergroup 0 2014-08-14 04:04 /tajo/system
+drwxr-xr-x - tajo supergroup 0 2014-09-23 06:48 /tajo/temp
+drwxr-xr-x - tajo supergroup 0 2014-08-14 04:15 /tajo/warehouse
+</pre></div>
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Added: tajo/site/docs/0.11.1/tsql/execute_file.html
URL: http://svn.apache.org/viewvc/tajo/site/docs/0.11.1/tsql/execute_file.html?rev=1728394&view=auto
==============================================================================
--- tajo/site/docs/0.11.1/tsql/execute_file.html (added)
+++ tajo/site/docs/0.11.1/tsql/execute_file.html Thu Feb 4 00:29:05 2016
@@ -0,0 +1,328 @@
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+ <link rel="next" title="Executing as background process" href="background_command.html"/>
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+<li class="toctree-l2"><a class="reference internal" href="../getting_started.html#prerequisites">Prerequisites</a></li>
+<li class="toctree-l2"><a class="reference internal" href="../getting_started.html#dowload-and-unpack-the-source-code">Dowload and unpack the source code</a></li>
+<li class="toctree-l2"><a class="reference internal" href="../getting_started.html#build-source-code">Build source code</a></li>
+<li class="toctree-l2"><a class="reference internal" href="../getting_started.html#setting-up-a-local-tajo-cluster">Setting up a local Tajo cluster</a></li>
+<li class="toctree-l2"><a class="reference internal" href="../getting_started.html#first-query-execution">First query execution</a></li>
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+<li class="toctree-l2"><a class="reference internal" href="../configuration/preliminary.html">Preliminary</a></li>
+<li class="toctree-l2"><a class="reference internal" href="../configuration/cluster_setup.html">Cluster Setup</a></li>
+<li class="toctree-l2"><a class="reference internal" href="../configuration/tajo_master_configuration.html">Tajo Master Configuration</a></li>
+<li class="toctree-l2"><a class="reference internal" href="../configuration/worker_configuration.html">Worker Configuration</a></li>
+<li class="toctree-l2"><a class="reference internal" href="../configuration/catalog_configuration.html">Catalog Configuration</a></li>
+<li class="toctree-l2"><a class="reference internal" href="../configuration/ha_configuration.html">High Availability for TajoMaster</a></li>
+<li class="toctree-l2"><a class="reference internal" href="../configuration/service_config_defaults.html">Cluster Service Configuration Defaults</a></li>
+<li class="toctree-l2"><a class="reference internal" href="../configuration/tajo-site-xml.html">The tajo-site.xml File</a></li>
+<li class="toctree-l2"><a class="reference internal" href="../configuration/catalog-site-xml.html">The catalog-site.xml File</a></li>
+<li class="toctree-l2"><a class="reference internal" href="../configuration/storage-site-json.html">The storage-site.json File</a></li>
+</ul>
+</li>
+<li class="toctree-l1 current"><a class="reference internal" href="../tsql.html">Tajo Shell (TSQL)</a><ul class="current">
+<li class="toctree-l2"><a class="reference internal" href="meta_command.html">Meta Commands</a></li>
+<li class="toctree-l2"><a class="reference internal" href="dfs_command.html">Executing HDFS commands</a></li>
+<li class="toctree-l2"><a class="reference internal" href="variables.html">Session Variables</a></li>
+<li class="toctree-l2"><a class="reference internal" href="admin_command.html">Administration Commands</a></li>
+<li class="toctree-l2"><a class="reference internal" href="intro.html">Introducing to TSQL</a></li>
+<li class="toctree-l2"><a class="reference internal" href="single_command.html">Executing a single command</a></li>
+<li class="toctree-l2 current"><a class="current reference internal" href="">Executing Queries from Files</a></li>
+<li class="toctree-l2"><a class="reference internal" href="background_command.html">Executing as background process</a></li>
+</ul>
+</li>
+<li class="toctree-l1"><a class="reference internal" href="../sql_language.html">SQL Language</a><ul>
+<li class="toctree-l2"><a class="reference internal" href="../sql_language/data_model.html">Data Model</a></li>
+<li class="toctree-l2"><a class="reference internal" href="../sql_language/ddl.html">Data Definition Language</a></li>
+<li class="toctree-l2"><a class="reference internal" href="../sql_language/insert.html">INSERT (OVERWRITE) INTO</a></li>
+<li class="toctree-l2"><a class="reference internal" href="../sql_language/alter_table.html">ALTER TABLE</a></li>
+<li class="toctree-l2"><a class="reference internal" href="../sql_language/queries.html">Queries</a></li>
+<li class="toctree-l2"><a class="reference internal" href="../sql_language/joins.html">Joins</a></li>
+<li class="toctree-l2"><a class="reference internal" href="../sql_language/sql_expression.html">SQL Expressions</a></li>
+<li class="toctree-l2"><a class="reference internal" href="../sql_language/predicates.html">Predicates</a></li>
+<li class="toctree-l2"><a class="reference internal" href="../sql_language/explain.html">EXPLAIN</a></li>
+</ul>
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+<li class="toctree-l2"><a class="reference internal" href="../time_zone.html#server-cluster-time-zone">Server Cluster Time Zone</a></li>
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+<li class="toctree-l2"><a class="reference internal" href="../functions.html#built-in-window-functions">Built-in Window Functions</a></li>
+<li class="toctree-l2"><a class="reference internal" href="../functions.html#user-defined-functions">User-defined Functions</a></li>
+</ul>
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+<li class="toctree-l1"><a class="reference internal" href="../table_management.html">Table Management</a><ul>
+<li class="toctree-l2"><a class="reference internal" href="../table_management/table_overview.html">Overview of Tajo Tables</a></li>
+<li class="toctree-l2"><a class="reference internal" href="../table_management/tablespaces.html">Tablespaces</a></li>
+<li class="toctree-l2"><a class="reference internal" href="../table_management/data_formats.html">Data Formats</a></li>
+<li class="toctree-l2"><a class="reference internal" href="../table_management/compression.html">Compression</a></li>
+</ul>
+</li>
+<li class="toctree-l1"><a class="reference internal" href="../table_partitioning.html">Table Partitioning</a><ul>
+<li class="toctree-l2"><a class="reference internal" href="../partitioning/intro_to_partitioning.html">Introduction to Partitioning</a></li>
+<li class="toctree-l2"><a class="reference internal" href="../partitioning/column_partitioning.html">Column Partitioning</a></li>
+<li class="toctree-l2"><a class="reference internal" href="../partitioning/range_partitioning.html">Range Partitioning</a></li>
+<li class="toctree-l2"><a class="reference internal" href="../partitioning/hash_partitioning.html">Hash Partitioning</a></li>
+</ul>
+</li>
+<li class="toctree-l1"><a class="reference internal" href="../storage_plugins.html">Storage Plugin</a><ul>
+<li class="toctree-l2"><a class="reference internal" href="../storage_plugins/overview.html">Storage Plugin Overview</a></li>
+<li class="toctree-l2"><a class="reference internal" href="../storage_plugins/postgresql.html">PostgreSQL Storage Handler</a></li>
+</ul>
+</li>
+<li class="toctree-l1"><a class="reference internal" href="../index_overview.html">Index (Experimental Feature)</a><ul>
+<li class="toctree-l2"><a class="reference internal" href="../index/types.html">Index Types</a></li>
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+<li class="toctree-l2"><a class="reference internal" href="../index/future_work.html">Future Works</a></li>
+</ul>
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+<li class="toctree-l1"><a class="reference internal" href="../backup_and_restore.html">Backup and Restore</a><ul>
+<li class="toctree-l2"><a class="reference internal" href="../backup_and_restore/catalog.html">Backup and Restore Catalog</a></li>
+</ul>
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+<li class="toctree-l1"><a class="reference internal" href="../hive_integration.html">Hive Integration</a></li>
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+<li class="toctree-l2"><a class="reference internal" href="../hbase_integration.html#create-table">CREATE TABLE</a></li>
+<li class="toctree-l2"><a class="reference internal" href="../hbase_integration.html#drop-table">DROP TABLE</a></li>
+<li class="toctree-l2"><a class="reference internal" href="../hbase_integration.html#insert-overwrite-into">INSERT (OVERWRITE) INTO</a></li>
+<li class="toctree-l2"><a class="reference internal" href="../hbase_integration.html#usage">Usage</a></li>
+</ul>
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+<li class="toctree-l1"><a class="reference internal" href="../swift_integration.html">OpenStack Swift Integration</a><ul>
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+<li class="toctree-l2"><a class="reference internal" href="../swift_integration.html#querying-on-swift">Querying on Swift</a></li>
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+<li class="toctree-l2"><a class="reference internal" href="../jdbc_driver.html#how-to-get-jdbc-driver">How to get JDBC driver</a></li>
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+<li class="toctree-l2"><a class="reference internal" href="../jdbc_driver.html#connecting-to-the-tajo-cluster-instance">Connecting to the Tajo cluster instance</a></li>
+<li class="toctree-l2"><a class="reference internal" href="../jdbc_driver.html#connection-parameters">Connection Parameters</a></li>
+<li class="toctree-l2"><a class="reference internal" href="../jdbc_driver.html#an-example-jdbc-client">An Example JDBC Client</a></li>
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+ <div class="section" id="executing-queries-from-files">
+<h1>Executing Queries from Files<a class="headerlink" href="#executing-queries-from-files" title="Permalink to this headline">¶</a></h1>
+<div class="section" id="basic-usages">
+<h2>Basic usages<a class="headerlink" href="#basic-usages" title="Permalink to this headline">¶</a></h2>
+<p><code class="docutils literal"><span class="pre">-f</span></code> command allows tsql to execute more than one SQL statements stored in a text file as follows:</p>
+<div class="highlight-sql"><div class="highlight"><pre>$ cat aggregation.sql
+select count(*) from table1;
+select sum(score) from table1;
+
+$ bin/tsql -f aggregation.sql
+Progress: 0%, response time: 0.216 sec
+Progress: 0%, response time: 0.217 sec
+Progress: 100%, response time: 0.331 sec
+?count
+-------------------------------
+5
+(1 rows, 0.331 sec, 2 B selected)
+Progress: 0%, response time: 0.203 sec
+Progress: 0%, response time: 0.204 sec
+Progress: 50%, response time: 0.406 sec
+Progress: 100%, response time: 0.769 sec
+?sum
+-------------------------------
+15.0
+(1 rows, 0.769 sec, 5 B selected)
+</pre></div>
+</div>
+</div>
+<div class="section" id="setting-parameter-value-in-sql-file">
+<h2>Setting parameter value in SQL file<a class="headerlink" href="#setting-parameter-value-in-sql-file" title="Permalink to this headline">¶</a></h2>
+<p>If you wish to set a parameter value in the SQL file, you can set with the -param key=value option. When you use this feature, you have to use the parameter in the file as follows:</p>
+<div class="highlight-sql"><div class="highlight"><pre>${paramter name}
+</pre></div>
+</div>
+<p>You have to put the parameter name in braces and you must use the $ symbol for the prefix as follows:</p>
+<div class="highlight-sql"><div class="highlight"><pre>$ cat aggregation.sql
+select count(*) from table1 where id = ${p_id};
+
+$ bin/tsql -param p_id=1 -f aggregation.sql
+Progress: 0%, response time: 0.216 sec
+Progress: 0%, response time: 0.217 sec
+Progress: 100%, response time: 0.331 sec
+?count
+-------------------------------
+1
+(1 rows, 0.331 sec, 2 B selected)
+</pre></div>
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Added: tajo/site/docs/0.11.1/tsql/intro.html
URL: http://svn.apache.org/viewvc/tajo/site/docs/0.11.1/tsql/intro.html?rev=1728394&view=auto
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--- tajo/site/docs/0.11.1/tsql/intro.html (added)
+++ tajo/site/docs/0.11.1/tsql/intro.html Thu Feb 4 00:29:05 2016
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+
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+</li>
+<li class="toctree-l1 current"><a class="reference internal" href="../tsql.html">Tajo Shell (TSQL)</a><ul class="current">
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+<li class="toctree-l2"><a class="reference internal" href="admin_command.html">Administration Commands</a></li>
+<li class="toctree-l2 current"><a class="current reference internal" href="">Introducing to TSQL</a></li>
+<li class="toctree-l2"><a class="reference internal" href="single_command.html">Executing a single command</a></li>
+<li class="toctree-l2"><a class="reference internal" href="execute_file.html">Executing Queries from Files</a></li>
+<li class="toctree-l2"><a class="reference internal" href="background_command.html">Executing as background process</a></li>
+</ul>
+</li>
+<li class="toctree-l1"><a class="reference internal" href="../sql_language.html">SQL Language</a><ul>
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+<li class="toctree-l2"><a class="reference internal" href="../sql_language/ddl.html">Data Definition Language</a></li>
+<li class="toctree-l2"><a class="reference internal" href="../sql_language/insert.html">INSERT (OVERWRITE) INTO</a></li>
+<li class="toctree-l2"><a class="reference internal" href="../sql_language/alter_table.html">ALTER TABLE</a></li>
+<li class="toctree-l2"><a class="reference internal" href="../sql_language/queries.html">Queries</a></li>
+<li class="toctree-l2"><a class="reference internal" href="../sql_language/joins.html">Joins</a></li>
+<li class="toctree-l2"><a class="reference internal" href="../sql_language/sql_expression.html">SQL Expressions</a></li>
+<li class="toctree-l2"><a class="reference internal" href="../sql_language/predicates.html">Predicates</a></li>
+<li class="toctree-l2"><a class="reference internal" href="../sql_language/explain.html">EXPLAIN</a></li>
+</ul>
+</li>
+<li class="toctree-l1"><a class="reference internal" href="../time_zone.html">Time Zone</a><ul>
+<li class="toctree-l2"><a class="reference internal" href="../time_zone.html#server-cluster-time-zone">Server Cluster Time Zone</a></li>
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+</ul>
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+<li class="toctree-l2"><a class="reference internal" href="../table_management/table_overview.html">Overview of Tajo Tables</a></li>
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+<li class="toctree-l2"><a class="reference internal" href="../table_management/data_formats.html">Data Formats</a></li>
+<li class="toctree-l2"><a class="reference internal" href="../table_management/compression.html">Compression</a></li>
+</ul>
+</li>
+<li class="toctree-l1"><a class="reference internal" href="../table_partitioning.html">Table Partitioning</a><ul>
+<li class="toctree-l2"><a class="reference internal" href="../partitioning/intro_to_partitioning.html">Introduction to Partitioning</a></li>
+<li class="toctree-l2"><a class="reference internal" href="../partitioning/column_partitioning.html">Column Partitioning</a></li>
+<li class="toctree-l2"><a class="reference internal" href="../partitioning/range_partitioning.html">Range Partitioning</a></li>
+<li class="toctree-l2"><a class="reference internal" href="../partitioning/hash_partitioning.html">Hash Partitioning</a></li>
+</ul>
+</li>
+<li class="toctree-l1"><a class="reference internal" href="../storage_plugins.html">Storage Plugin</a><ul>
+<li class="toctree-l2"><a class="reference internal" href="../storage_plugins/overview.html">Storage Plugin Overview</a></li>
+<li class="toctree-l2"><a class="reference internal" href="../storage_plugins/postgresql.html">PostgreSQL Storage Handler</a></li>
+</ul>
+</li>
+<li class="toctree-l1"><a class="reference internal" href="../index_overview.html">Index (Experimental Feature)</a><ul>
+<li class="toctree-l2"><a class="reference internal" href="../index/types.html">Index Types</a></li>
+<li class="toctree-l2"><a class="reference internal" href="../index/how_to_use.html">How to use index?</a></li>
+<li class="toctree-l2"><a class="reference internal" href="../index/future_work.html">Future Works</a></li>
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+</li>
+<li class="toctree-l1"><a class="reference internal" href="../backup_and_restore.html">Backup and Restore</a><ul>
+<li class="toctree-l2"><a class="reference internal" href="../backup_and_restore/catalog.html">Backup and Restore Catalog</a></li>
+</ul>
+</li>
+<li class="toctree-l1"><a class="reference internal" href="../hive_integration.html">Hive Integration</a></li>
+<li class="toctree-l1"><a class="reference internal" href="../hbase_integration.html">HBase Integration</a><ul>
+<li class="toctree-l2"><a class="reference internal" href="../hbase_integration.html#create-table">CREATE TABLE</a></li>
+<li class="toctree-l2"><a class="reference internal" href="../hbase_integration.html#drop-table">DROP TABLE</a></li>
+<li class="toctree-l2"><a class="reference internal" href="../hbase_integration.html#insert-overwrite-into">INSERT (OVERWRITE) INTO</a></li>
+<li class="toctree-l2"><a class="reference internal" href="../hbase_integration.html#usage">Usage</a></li>
+</ul>
+</li>
+<li class="toctree-l1"><a class="reference internal" href="../swift_integration.html">OpenStack Swift Integration</a><ul>
+<li class="toctree-l2"><a class="reference internal" href="../swift_integration.html#swift-configuration">Swift configuration</a></li>
+<li class="toctree-l2"><a class="reference internal" href="../swift_integration.html#hadoop-configurations">Hadoop configurations</a></li>
+<li class="toctree-l2"><a class="reference internal" href="../swift_integration.html#tajo-configuration">Tajo configuration</a></li>
+<li class="toctree-l2"><a class="reference internal" href="../swift_integration.html#querying-on-swift">Querying on Swift</a></li>
+</ul>
+</li>
+<li class="toctree-l1"><a class="reference internal" href="../jdbc_driver.html">Tajo JDBC Driver</a><ul>
+<li class="toctree-l2"><a class="reference internal" href="../jdbc_driver.html#how-to-get-jdbc-driver">How to get JDBC driver</a></li>
+<li class="toctree-l2"><a class="reference internal" href="../jdbc_driver.html#setting-the-classpath">Setting the CLASSPATH</a></li>
+<li class="toctree-l2"><a class="reference internal" href="../jdbc_driver.html#connecting-to-the-tajo-cluster-instance">Connecting to the Tajo cluster instance</a></li>
+<li class="toctree-l2"><a class="reference internal" href="../jdbc_driver.html#connection-parameters">Connection Parameters</a></li>
+<li class="toctree-l2"><a class="reference internal" href="../jdbc_driver.html#an-example-jdbc-client">An Example JDBC Client</a></li>
+</ul>
+</li>
+<li class="toctree-l1"><a class="reference internal" href="../tajo_client_api.html">Tajo Client API</a></li>
+<li class="toctree-l1"><a class="reference internal" href="../faq.html">FAQ</a></li>
+</ul>
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+
+ <li>Introducing to TSQL</li>
+ <li class="wy-breadcrumbs-aside">
+
+ <a href="../_sources/tsql/intro.txt" rel="nofollow"> View page source</a>
+
+ </li>
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+ <div role="main">
+
+ <div class="section" id="introducing-to-tsql">
+<h1>Introducing to TSQL<a class="headerlink" href="#introducing-to-tsql" title="Permalink to this headline">¶</a></h1>
+<div class="section" id="synopsis">
+<h2>Synopsis<a class="headerlink" href="#synopsis" title="Permalink to this headline">¶</a></h2>
+<div class="highlight-bash"><div class="highlight"><pre>bin/tsql <span class="o">[</span>options<span class="o">]</span> <span class="o">[</span>database name<span class="o">]</span>
+</pre></div>
+</div>
+<p>If a <em>database_name</em> is given, tsql connects to the database at startup time. Otherwise, tsql connects to <code class="docutils literal"><span class="pre">default</span></code> database.</p>
+<p>Options</p>
+<ul class="simple">
+<li><code class="docutils literal"><span class="pre">-c</span> <span class="pre">"quoted</span> <span class="pre">sql"</span></code> : Execute quoted sql statements, and then the shell will exist.</li>
+<li><code class="docutils literal"><span class="pre">-f</span> <span class="pre">filename</span> <span class="pre">(--file</span> <span class="pre">filename)</span></code> : Use the file named filename as the source of commands instead of interactive shell.</li>
+<li><code class="docutils literal"><span class="pre">-h</span> <span class="pre">hostname</span> <span class="pre">(--host</span> <span class="pre">hostname)</span></code> : Specifies the host name of the machine on which the Tajo master is running.</li>
+<li><code class="docutils literal"><span class="pre">-p</span> <span class="pre">port</span> <span class="pre">(--port</span> <span class="pre">port)</span></code> : Specifies the TCP port. If it is not set, the port will be 26002 by default.</li>
+<li><code class="docutils literal"><span class="pre">-conf</span> <span class="pre">configuration</span> <span class="pre">(--conf</span> <span class="pre">configuration)</span></code> : Setting Tajo configuration value.</li>
+<li><code class="docutils literal"><span class="pre">-param</span> <span class="pre">parameter</span> <span class="pre">(--param</span> <span class="pre">parameter)</span></code> : Use a parameter value in SQL file.</li>
+<li><code class="docutils literal"><span class="pre">-B</span> <span class="pre">(--background)</span></code> : Execute as background process.</li>
+</ul>
+</div>
+<div class="section" id="entering-tsql-shell">
+<h2>Entering tsql shell<a class="headerlink" href="#entering-tsql-shell" title="Permalink to this headline">¶</a></h2>
+<p>If the hostname and the port num are not given, tsql will try to connect the Tajo master specified in ${TAJO_HOME}/conf/tajo-site.xml.</p>
+<div class="highlight-python"><div class="highlight"><pre>bin/tsql
+
+default>
+</pre></div>
+</div>
+<p>If you want to connect a specified TajoMaster, you should use ‘-h’ and (or) ‘p’ options as follows:</p>
+<div class="highlight-python"><div class="highlight"><pre>bin/tsql -h localhost -p 9004
+
+default>
+</pre></div>
+</div>
+<p>The prompt indicates the current database.</p>
+</div>
+</div>
+
+
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Added: tajo/site/docs/0.11.1/tsql/meta_command.html
URL: http://svn.apache.org/viewvc/tajo/site/docs/0.11.1/tsql/meta_command.html?rev=1728394&view=auto
==============================================================================
--- tajo/site/docs/0.11.1/tsql/meta_command.html (added)
+++ tajo/site/docs/0.11.1/tsql/meta_command.html Thu Feb 4 00:29:05 2016
@@ -0,0 +1,417 @@
+
+
+<!DOCTYPE html>
+<!--[if IE 8]><html class="no-js lt-ie9" lang="en" > <![endif]-->
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+ <link rel="up" title="Tajo Shell (TSQL)" href="../tsql.html"/>
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+<li class="toctree-l2"><a class="reference internal" href="../getting_started.html#prerequisites">Prerequisites</a></li>
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+<li class="toctree-l2"><a class="reference internal" href="../getting_started.html#build-source-code">Build source code</a></li>
+<li class="toctree-l2"><a class="reference internal" href="../getting_started.html#setting-up-a-local-tajo-cluster">Setting up a local Tajo cluster</a></li>
+<li class="toctree-l2"><a class="reference internal" href="../getting_started.html#first-query-execution">First query execution</a></li>
+</ul>
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+<li class="toctree-l2"><a class="reference internal" href="../configuration/cluster_setup.html">Cluster Setup</a></li>
+<li class="toctree-l2"><a class="reference internal" href="../configuration/tajo_master_configuration.html">Tajo Master Configuration</a></li>
+<li class="toctree-l2"><a class="reference internal" href="../configuration/worker_configuration.html">Worker Configuration</a></li>
+<li class="toctree-l2"><a class="reference internal" href="../configuration/catalog_configuration.html">Catalog Configuration</a></li>
+<li class="toctree-l2"><a class="reference internal" href="../configuration/ha_configuration.html">High Availability for TajoMaster</a></li>
+<li class="toctree-l2"><a class="reference internal" href="../configuration/service_config_defaults.html">Cluster Service Configuration Defaults</a></li>
+<li class="toctree-l2"><a class="reference internal" href="../configuration/tajo-site-xml.html">The tajo-site.xml File</a></li>
+<li class="toctree-l2"><a class="reference internal" href="../configuration/catalog-site-xml.html">The catalog-site.xml File</a></li>
+<li class="toctree-l2"><a class="reference internal" href="../configuration/storage-site-json.html">The storage-site.json File</a></li>
+</ul>
+</li>
+<li class="toctree-l1 current"><a class="reference internal" href="../tsql.html">Tajo Shell (TSQL)</a><ul class="current">
+<li class="toctree-l2 current"><a class="current reference internal" href="">Meta Commands</a></li>
+<li class="toctree-l2"><a class="reference internal" href="dfs_command.html">Executing HDFS commands</a></li>
+<li class="toctree-l2"><a class="reference internal" href="variables.html">Session Variables</a></li>
+<li class="toctree-l2"><a class="reference internal" href="admin_command.html">Administration Commands</a></li>
+<li class="toctree-l2"><a class="reference internal" href="intro.html">Introducing to TSQL</a></li>
+<li class="toctree-l2"><a class="reference internal" href="single_command.html">Executing a single command</a></li>
+<li class="toctree-l2"><a class="reference internal" href="execute_file.html">Executing Queries from Files</a></li>
+<li class="toctree-l2"><a class="reference internal" href="background_command.html">Executing as background process</a></li>
+</ul>
+</li>
+<li class="toctree-l1"><a class="reference internal" href="../sql_language.html">SQL Language</a><ul>
+<li class="toctree-l2"><a class="reference internal" href="../sql_language/data_model.html">Data Model</a></li>
+<li class="toctree-l2"><a class="reference internal" href="../sql_language/ddl.html">Data Definition Language</a></li>
+<li class="toctree-l2"><a class="reference internal" href="../sql_language/insert.html">INSERT (OVERWRITE) INTO</a></li>
+<li class="toctree-l2"><a class="reference internal" href="../sql_language/alter_table.html">ALTER TABLE</a></li>
+<li class="toctree-l2"><a class="reference internal" href="../sql_language/queries.html">Queries</a></li>
+<li class="toctree-l2"><a class="reference internal" href="../sql_language/joins.html">Joins</a></li>
+<li class="toctree-l2"><a class="reference internal" href="../sql_language/sql_expression.html">SQL Expressions</a></li>
+<li class="toctree-l2"><a class="reference internal" href="../sql_language/predicates.html">Predicates</a></li>
+<li class="toctree-l2"><a class="reference internal" href="../sql_language/explain.html">EXPLAIN</a></li>
+</ul>
+</li>
+<li class="toctree-l1"><a class="reference internal" href="../time_zone.html">Time Zone</a><ul>
+<li class="toctree-l2"><a class="reference internal" href="../time_zone.html#server-cluster-time-zone">Server Cluster Time Zone</a></li>
+<li class="toctree-l2"><a class="reference internal" href="../time_zone.html#table-time-zone">Table Time Zone</a></li>
+<li class="toctree-l2"><a class="reference internal" href="../time_zone.html#client-time-zone">Client Time Zone</a></li>
+<li class="toctree-l2"><a class="reference internal" href="../time_zone.html#time-zone-id">Time Zone ID</a></li>
+<li class="toctree-l2"><a class="reference internal" href="../time_zone.html#examples-of-time-zone">Examples of Time Zone</a></li>
+</ul>
+</li>
+<li class="toctree-l1"><a class="reference internal" href="../functions.html">Functions</a><ul>
+<li class="toctree-l2"><a class="reference internal" href="../functions.html#built-in-scalar-functions">Built-in Scalar Functions</a></li>
+<li class="toctree-l2"><a class="reference internal" href="../functions.html#built-in-aggregation-functions">Built-in Aggregation Functions</a></li>
+<li class="toctree-l2"><a class="reference internal" href="../functions.html#built-in-window-functions">Built-in Window Functions</a></li>
+<li class="toctree-l2"><a class="reference internal" href="../functions.html#user-defined-functions">User-defined Functions</a></li>
+</ul>
+</li>
+<li class="toctree-l1"><a class="reference internal" href="../table_management.html">Table Management</a><ul>
+<li class="toctree-l2"><a class="reference internal" href="../table_management/table_overview.html">Overview of Tajo Tables</a></li>
+<li class="toctree-l2"><a class="reference internal" href="../table_management/tablespaces.html">Tablespaces</a></li>
+<li class="toctree-l2"><a class="reference internal" href="../table_management/data_formats.html">Data Formats</a></li>
+<li class="toctree-l2"><a class="reference internal" href="../table_management/compression.html">Compression</a></li>
+</ul>
+</li>
+<li class="toctree-l1"><a class="reference internal" href="../table_partitioning.html">Table Partitioning</a><ul>
+<li class="toctree-l2"><a class="reference internal" href="../partitioning/intro_to_partitioning.html">Introduction to Partitioning</a></li>
+<li class="toctree-l2"><a class="reference internal" href="../partitioning/column_partitioning.html">Column Partitioning</a></li>
+<li class="toctree-l2"><a class="reference internal" href="../partitioning/range_partitioning.html">Range Partitioning</a></li>
+<li class="toctree-l2"><a class="reference internal" href="../partitioning/hash_partitioning.html">Hash Partitioning</a></li>
+</ul>
+</li>
+<li class="toctree-l1"><a class="reference internal" href="../storage_plugins.html">Storage Plugin</a><ul>
+<li class="toctree-l2"><a class="reference internal" href="../storage_plugins/overview.html">Storage Plugin Overview</a></li>
+<li class="toctree-l2"><a class="reference internal" href="../storage_plugins/postgresql.html">PostgreSQL Storage Handler</a></li>
+</ul>
+</li>
+<li class="toctree-l1"><a class="reference internal" href="../index_overview.html">Index (Experimental Feature)</a><ul>
+<li class="toctree-l2"><a class="reference internal" href="../index/types.html">Index Types</a></li>
+<li class="toctree-l2"><a class="reference internal" href="../index/how_to_use.html">How to use index?</a></li>
+<li class="toctree-l2"><a class="reference internal" href="../index/future_work.html">Future Works</a></li>
+</ul>
+</li>
+<li class="toctree-l1"><a class="reference internal" href="../backup_and_restore.html">Backup and Restore</a><ul>
+<li class="toctree-l2"><a class="reference internal" href="../backup_and_restore/catalog.html">Backup and Restore Catalog</a></li>
+</ul>
+</li>
+<li class="toctree-l1"><a class="reference internal" href="../hive_integration.html">Hive Integration</a></li>
+<li class="toctree-l1"><a class="reference internal" href="../hbase_integration.html">HBase Integration</a><ul>
+<li class="toctree-l2"><a class="reference internal" href="../hbase_integration.html#create-table">CREATE TABLE</a></li>
+<li class="toctree-l2"><a class="reference internal" href="../hbase_integration.html#drop-table">DROP TABLE</a></li>
+<li class="toctree-l2"><a class="reference internal" href="../hbase_integration.html#insert-overwrite-into">INSERT (OVERWRITE) INTO</a></li>
+<li class="toctree-l2"><a class="reference internal" href="../hbase_integration.html#usage">Usage</a></li>
+</ul>
+</li>
+<li class="toctree-l1"><a class="reference internal" href="../swift_integration.html">OpenStack Swift Integration</a><ul>
+<li class="toctree-l2"><a class="reference internal" href="../swift_integration.html#swift-configuration">Swift configuration</a></li>
+<li class="toctree-l2"><a class="reference internal" href="../swift_integration.html#hadoop-configurations">Hadoop configurations</a></li>
+<li class="toctree-l2"><a class="reference internal" href="../swift_integration.html#tajo-configuration">Tajo configuration</a></li>
+<li class="toctree-l2"><a class="reference internal" href="../swift_integration.html#querying-on-swift">Querying on Swift</a></li>
+</ul>
+</li>
+<li class="toctree-l1"><a class="reference internal" href="../jdbc_driver.html">Tajo JDBC Driver</a><ul>
+<li class="toctree-l2"><a class="reference internal" href="../jdbc_driver.html#how-to-get-jdbc-driver">How to get JDBC driver</a></li>
+<li class="toctree-l2"><a class="reference internal" href="../jdbc_driver.html#setting-the-classpath">Setting the CLASSPATH</a></li>
+<li class="toctree-l2"><a class="reference internal" href="../jdbc_driver.html#connecting-to-the-tajo-cluster-instance">Connecting to the Tajo cluster instance</a></li>
+<li class="toctree-l2"><a class="reference internal" href="../jdbc_driver.html#connection-parameters">Connection Parameters</a></li>
+<li class="toctree-l2"><a class="reference internal" href="../jdbc_driver.html#an-example-jdbc-client">An Example JDBC Client</a></li>
+</ul>
+</li>
+<li class="toctree-l1"><a class="reference internal" href="../tajo_client_api.html">Tajo Client API</a></li>
+<li class="toctree-l1"><a class="reference internal" href="../faq.html">FAQ</a></li>
+</ul>
+
+
+ </div>
+
+ </nav>
+
+ <section data-toggle="wy-nav-shift" class="wy-nav-content-wrap">
+
+
+ <nav class="wy-nav-top" role="navigation" aria-label="top navigation">
+ <i data-toggle="wy-nav-top" class="fa fa-bars"></i>
+ <a href="../index.html">Apache Tajo</a>
+ </nav>
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+ <div class="wy-nav-content">
+ <div class="rst-content">
+ <div role="navigation" aria-label="breadcrumbs navigation">
+ <ul class="wy-breadcrumbs">
+ <li><a href="../index.html">Docs</a> »</li>
+
+ <li><a href="../tsql.html">Tajo Shell (TSQL)</a> »</li>
+
+ <li>Meta Commands</li>
+ <li class="wy-breadcrumbs-aside">
+
+ <a href="../_sources/tsql/meta_command.txt" rel="nofollow"> View page source</a>
+
+ </li>
+ </ul>
+ <hr/>
+</div>
+ <div role="main">
+
+ <div class="section" id="meta-commands">
+<h1>Meta Commands<a class="headerlink" href="#meta-commands" title="Permalink to this headline">¶</a></h1>
+<p>In tsql, any command that begins with an unquoted backslash (‘\’) is a tsql meta-command that is processed by tsql itself.</p>
+<p>In the current implementation, there are meta commands as follows:</p>
+<div class="highlight-python"><div class="highlight"><pre>default> \?
+
+
+General
+ \copyright show Apache License 2.0
+ \version show Tajo version
+ \? show help
+ \? [COMMAND] show help of a given command
+ \help alias of \?
+ \q quit tsql
+
+
+Informational
+ \l list databases
+ \c show current database
+ \c [DBNAME] connect to new database
+ \d list tables
+ \d [TBNAME] describe table
+ \df list functions
+ \df NAME describe function
+
+
+Tool
+ \! execute a linux shell command
+ \dfs execute a dfs command
+ \admin execute Tajo admin command
+
+
+Variables
+ \set [[NAME] [VALUE] set session variable or list session variables
+ \unset NAME unset session variable
+
+
+Documentations
+ tsql guide http://tajo.apache.org/docs/current/tsql.html
+ Query language http://tajo.apache.org/docs/current/sql_language.html
+ Functions http://tajo.apache.org/docs/current/functions.html
+ Backup & restore http://tajo.apache.org/docs/current/backup_and_restore.html
+ Configuration http://tajo.apache.org/docs/current/configuration.html
+</pre></div>
+</div>
+<div class="section" id="basic-usages">
+<h2>Basic usages<a class="headerlink" href="#basic-usages" title="Permalink to this headline">¶</a></h2>
+<p><code class="docutils literal"><span class="pre">\l</span></code> command shows a list of all databases as follows:</p>
+<div class="highlight-python"><div class="highlight"><pre>default> \l
+default
+tpch
+work1
+default>
+</pre></div>
+</div>
+<p><code class="docutils literal"><span class="pre">\d</span></code> command shows a list of tables in the current database as follows:</p>
+<div class="highlight-python"><div class="highlight"><pre>default> \d
+customer
+lineitem
+nation
+orders
+part
+partsupp
+region
+supplier
+</pre></div>
+</div>
+<p><code class="docutils literal"><span class="pre">\d</span> <span class="pre">[table</span> <span class="pre">name]</span></code> command also shows a table description as follows:</p>
+<div class="highlight-python"><div class="highlight"><pre>default> \d orders
+
+table name: orders
+table path: hdfs:/xxx/xxx/tpch/orders
+store type: TEXT
+number of rows: 0
+volume (bytes): 172.0 MB
+schema:
+o_orderkey INT8
+o_custkey INT8
+o_orderstatus TEXT
+o_totalprice FLOAT8
+o_orderdate TEXT
+o_orderpriority TEXT
+o_clerk TEXT
+o_shippriority INT4
+o_comment TEXT
+</pre></div>
+</div>
+<p>The prompt <code class="docutils literal"><span class="pre">default></span></code> indicates the current database. Basically, all SQL statements and meta commands work in the current database. Also, you can change the current database with <code class="docutils literal"><span class="pre">\c</span></code> command.</p>
+<div class="highlight-sql"><div class="highlight"><pre>default> \c work1
+You are now connected to database "test" as user "hyunsik".
+work1>
+</pre></div>
+</div>
+<p><code class="docutils literal"><span class="pre">\df</span></code> command shows a list of all built-in functions as follows:</p>
+<div class="highlight-python"><div class="highlight"><pre>default> \df
+ Name | Result type | Argument types | Description | Type
+-----------------+-----------------+-----------------------+-----------------------------------------------+-----------
+ abs | INT4 | INT4 | Absolute value | GENERAL
+ abs | INT8 | INT8 | Absolute value | GENERAL
+ abs | FLOAT4 | FLOAT4 | Absolute value | GENERAL
+ abs | FLOAT8 | FLOAT8 | Absolute value | GENERAL
+ acos | FLOAT8 | FLOAT4 | Inverse cosine. | GENERAL
+ acos | FLOAT8 | FLOAT8 | Inverse cosine. | GENERAL
+ utc_usec_to | INT8 | TEXT,INT8 | Extract field from time | GENERAL
+ utc_usec_to | INT8 | TEXT,INT8,INT4 | Extract field from time | GENERAL
+
+(181) rows
+
+For Reference, many details have been omitted in order to present a clear picture of the process.
+</pre></div>
+</div>
+<p><code class="docutils literal"><span class="pre">\df</span> <span class="pre">[function</span> <span class="pre">name]</span></code> command also shows a function description as follows:</p>
+<div class="highlight-python"><div class="highlight"><pre>default> \df round;
+ Name | Result type | Argument types | Description | Type
+-----------------+-----------------+-----------------------+-----------------------------------------------+-----------
+ round | INT8 | FLOAT4 | Round to nearest integer. | GENERAL
+ round | INT8 | FLOAT8 | Round to nearest integer. | GENERAL
+ round | INT8 | INT4 | Round to nearest integer. | GENERAL
+ round | INT8 | INT8 | Round to nearest integer. | GENERAL
+ round | FLOAT8 | FLOAT8,INT4 | Round to s decimalN places. | GENERAL
+ round | FLOAT8 | INT8,INT4 | Round to s decimalN places. | GENERAL
+
+(6) rows
+
+Function: INT8 round(float4)
+Description: Round to nearest integer.
+Example:
+> SELECT round(42.4)
+42
+
+Function: FLOAT8 round(float8,int4)
+Description: Round to s decimalN places.
+Example:
+> SELECT round(42.4382, 2)
+42.44
+</pre></div>
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