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Posted to commits@cassandra.apache.org by ee...@apache.org on 2011/02/07 20:06:12 UTC
svn commit: r1068054 - in /cassandra/trunk: doc/cql/CQL.html
doc/cql/CQL.textile src/java/org/apache/cassandra/cql/Cql.g
src/java/org/apache/cassandra/cql/Term.java test/system/test_cql.py
Author: eevans
Date: Mon Feb 7 19:06:11 2011
New Revision: 1068054
URL: http://svn.apache.org/viewvc?rev=1068054&view=rev
Log:
uuid term definitions
Patch by eevans for CASSANDRA-2027
Modified:
cassandra/trunk/doc/cql/CQL.html
cassandra/trunk/doc/cql/CQL.textile
cassandra/trunk/src/java/org/apache/cassandra/cql/Cql.g
cassandra/trunk/src/java/org/apache/cassandra/cql/Term.java
cassandra/trunk/test/system/test_cql.py
Modified: cassandra/trunk/doc/cql/CQL.html
URL: http://svn.apache.org/viewvc/cassandra/trunk/doc/cql/CQL.html?rev=1068054&r1=1068053&r2=1068054&view=diff
==============================================================================
--- cassandra/trunk/doc/cql/CQL.html (original)
+++ cassandra/trunk/doc/cql/CQL.html Mon Feb 7 19:06:11 2011
@@ -1,4 +1,4 @@
-<?xml version='1.0' encoding='utf-8' ?><!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd"><html xmlns="http://www.w3.org/1999/xhtml"><head><meta http-equiv="Content-Type" content="text/html; charset=utf-8"/></head><body><h1 id="CassandraQueryLanguageCQLv0.99.1">Cassandra Query Language (CQL) v0.99.1</h1><h2 id="TableofContents">Table of Contents</h2><ol style="list-style: none;"><li><a href="#CassandraQueryLanguageCQLv0.99.1">Cassandra Query Language (CQL) v0.99.1</a><ol style="list-style: none;"><li><a href="#TableofContents">Table of Contents</a></li><li><a href="#USE">USE</a></li><li><a href="#SELECT">SELECT</a><ol style="list-style: none;"><li><a href="#SpecifyingColumns">Specifying Columns</a></li><li><a href="#ColumnFamily">Column Family</a></li><li><a href="#ConsistencyLevel">Consistency Level</a></li><li><a href="#Filteringrows">Filtering rows</a></li><li><a href="#Limits">Limits</a></li></ol></li>
<li><a href="#UPDATE">UPDATE</a><ol style="list-style: none;"><li><a href="#ColumnFamily2">Column Family</a></li><li><a href="#ConsistencyLevel2">Consistency Level</a></li><li><a href="#SpecifyingColumnsandRow">Specifying Columns and Row</a></li></ol></li><li><a href="#DELETE">DELETE</a><ol style="list-style: none;"><li><a href="#SpecifyingColumns2">Specifying Columns</a></li><li><a href="#ColumnFamily3">Column Family</a></li><li><a href="#ConsistencyLevel3">Consistency Level</a></li><li><a href="#deleterows">Specifying Rows</a></li></ol></li><li><a href="#TRUNCATE">TRUNCATE</a></li><li><a href="#CREATEKEYSPACE">CREATE KEYSPACE</a></li><li><a href="#CommonIdioms">Common Idioms</a><ol style="list-style: none;"><li><a href="#consistency">Specifying Consistency</a></li><li><a href="#terms">Term specification</a><ol style="list-style: none;"><li><a href="#StringLiterals">String Literals</a></li><li><a href="#Integerslongs">Integers / longs</a></li></ol></li></ol></li></ol></li><
/ol><h2 id="USE">USE</h2><p><i>Synopsis:</i></p><pre><code>USE <KEYSPACE>;
+<?xml version='1.0' encoding='utf-8' ?><!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd"><html xmlns="http://www.w3.org/1999/xhtml"><head><meta http-equiv="Content-Type" content="text/html; charset=utf-8"/></head><body><h1 id="CassandraQueryLanguageCQLv0.99.1">Cassandra Query Language (CQL) v0.99.1</h1><h2 id="TableofContents">Table of Contents</h2><ol style="list-style: none;"><li><a href="#CassandraQueryLanguageCQLv0.99.1">Cassandra Query Language (CQL) v0.99.1</a><ol style="list-style: none;"><li><a href="#TableofContents">Table of Contents</a></li><li><a href="#USE">USE</a></li><li><a href="#SELECT">SELECT</a><ol style="list-style: none;"><li><a href="#SpecifyingColumns">Specifying Columns</a></li><li><a href="#ColumnFamily">Column Family</a></li><li><a href="#ConsistencyLevel">Consistency Level</a></li><li><a href="#Filteringrows">Filtering rows</a></li><li><a href="#Limits">Limits</a></li></ol></li>
<li><a href="#UPDATE">UPDATE</a><ol style="list-style: none;"><li><a href="#ColumnFamily2">Column Family</a></li><li><a href="#ConsistencyLevel2">Consistency Level</a></li><li><a href="#SpecifyingColumnsandRow">Specifying Columns and Row</a></li></ol></li><li><a href="#DELETE">DELETE</a><ol style="list-style: none;"><li><a href="#SpecifyingColumns2">Specifying Columns</a></li><li><a href="#ColumnFamily3">Column Family</a></li><li><a href="#ConsistencyLevel3">Consistency Level</a></li><li><a href="#deleterows">Specifying Rows</a></li></ol></li><li><a href="#TRUNCATE">TRUNCATE</a></li><li><a href="#CREATEKEYSPACE">CREATE KEYSPACE</a></li><li><a href="#CommonIdioms">Common Idioms</a><ol style="list-style: none;"><li><a href="#consistency">Specifying Consistency</a></li><li><a href="#terms">Term specification</a><ol style="list-style: none;"><li><a href="#StringLiterals">String Literals</a></li><li><a href="#Integerslongs">Integers / longs</a></li><li><a href="#UUIDs">UUIDs</a><
/li></ol></li></ol></li></ol></li></ol><h2 id="USE">USE</h2><p><i>Synopsis:</i></p><pre><code>USE <KEYSPACE>;
</code></pre><p>A <code>USE</code> statement consists of the <code>USE</code> keyword, followed by a valid keyspace name. Its purpose is to assign the per-connection, current working keyspace. All subsequent keyspace-specific actions will be performed in the context of the supplied value.</p><h2 id="SELECT">SELECT</h2><p><i>Synopsis:</i></p><pre><code>SELECT [FIRST N] [REVERSED] <SELECT EXPR> FROM <COLUMN FAMILY> [USING <CONSISTENCY>]
[WHERE <CLAUSE>] [LIMIT N];
</code></pre><p>A <code>SELECT</code> is used to read one or more records from a Cassandra column family. It returns a result-set of rows, where each row consists of a key and a collection of columns corresponding to the query.</p><h3 id="SpecifyingColumns">Specifying Columns</h3><pre><code>SELECT [FIRST N] [REVERSED] name1, name2, name3 FROM ...
@@ -29,4 +29,4 @@ UPDATE ... WHERE KEY IN (keyname1, keyna
</code></pre><p>Accepts a single argument for the column family name, and permanently removes all data from said column family.</p><h2 id="CREATEKEYSPACE">CREATE KEYSPACE</h2><p><em>Synopsis:</em></p><pre><code>CREATE KEYSPACE <NAME> WITH replication_factor = <NUM> AND strategy_class = "<STRATEGY>"
[AND strategy_options.<OPTION> = <VALUE> [AND strategy_options.<OPTION> = <VALUE>]];
</code></pre><p>The <code>CREATE KEYSPACE</code> statement creates a new top-level namespace (aka “keyspace”). Valid names are any string constructed of alphanumeric characters and underscores, but must begin with a letter. Properties such as replication strategy and count are specified during creation using the following accepted keyword arguments:</p><table><tr><th>keyword</th><th>required</th><th>description</th></tr><tr><td>replication_factor</td><td>yes</td><td>Numeric argument that specifies the number of replicas for this keyspace.</td></tr><tr><td>strategy_class</td><td>yes</td><td>Class name to use for managing replica placement. Any of the shipped strategies can be used by specifying the class name relative to org.apache.cassandra.locator, others will need to be fully-qualified and located on the classpath.</td></tr><tr><td>strategy_options</td><td>no</td><td>Some strategies require additional arguments which can be supplied by appending the option na
me to the <code>strategy_options</code> keyword, separated by a colon (<code>:</code>). For example, a strategy option of “DC1” with a value of “1” would be specified as <code>strategy_options:DC1 = "1"</code>.</td></tr></table><h2 id="CommonIdioms">Common Idioms</h2><h3 id="consistency">Specifying Consistency</h3><pre><code>... USING <CONSISTENCY> ...
-</code></pre><p>Consistency level specifications are made up the keyword <code>USING</code>, followed by a consistency level identifier. Valid consistency levels are as follows:</p><ul><li><code>CONSISTENCY.ZERO</code></li><li><code>CONSISTENCY.ONE</code> (default)</li><li><code>CONSISTENCY.QUORUM</code></li><li><code>CONSISTENCY.ALL</code></li><li><code>CONSISTENCY.DCQUORUM</code></li><li><code>CONSISTENCY.DCQUORUMSYNC</code></li></ul><h3 id="terms">Term specification</h3><p>Where possible, the type of terms are inferred; the following term types are supported:</p><h4 id="StringLiterals">String Literals</h4><p>String literals are any value enclosed in double-quotes, (`"`). String literals are treated as raw bytes; no interpolation is performed.</p><h4 id="Integerslongs">Integers / longs</h4><p>Integers are any term consisting soley of unquoted numericals, longs are any otherwise valid integer term followed by an upper case “L”, (e.g. 100L). It is an error to s
pecify an integer term that will not fit in 4 bytes unsigned, or a long that will not fit in 8 bytes unsigned.</p></body></html>
\ No newline at end of file
+</code></pre><p>Consistency level specifications are made up the keyword <code>USING</code>, followed by a consistency level identifier. Valid consistency levels are as follows:</p><ul><li><code>CONSISTENCY.ZERO</code></li><li><code>CONSISTENCY.ONE</code> (default)</li><li><code>CONSISTENCY.QUORUM</code></li><li><code>CONSISTENCY.ALL</code></li><li><code>CONSISTENCY.DCQUORUM</code></li><li><code>CONSISTENCY.DCQUORUMSYNC</code></li></ul><h3 id="terms">Term specification</h3><p>Where possible, the type of terms are inferred; the following term types are supported:</p><h4 id="StringLiterals">String Literals</h4><p>String literals are any value enclosed in double-quotes, (`"`). String literals are treated as raw bytes; no interpolation is performed.</p><h4 id="Integerslongs">Integers / longs</h4><p>Integers are any term consisting soley of unquoted numericals, longs are any otherwise valid integer term followed by an upper case “L”, (e.g. 100L). It is an error to s
pecify an integer term that will not fit in 4 bytes unsigned, or a long that will not fit in 8 bytes unsigned.</p><h4 id="UUIDs">UUIDs</h4><p>There are two types of UUIDs supported by the CQL specification, time-based (version 1) and randomly generated (version 4). These are specified in statements using the <code>timeuuid(<UUID STRING>)</code> and <code>uuid(<UUID STRING>)</code> notations respectively.</p><p>In addition to the hex-based string representation, <code>timeuuid()</code> terms also accept arguments to specify the data-time component. The full list of <code>timeuuid()</code> arguments are:</p><table><tr><th>argument</th><th>example</th><th>behavior</th></tr><tr><td>none</td><td>timeuuid()</td><td>Results in the creation of a new UUID based on system time of the node parsing the query.</td></tr><tr><td>now</td><td>timeuuid(“now”)</td><td>Results in the creation of a new UUID based on system time of the node parsing the query.</td></tr><tr>
<td>milliseconds since epoch</td><td>timeuuid(1296755320376)</td><td>Creates a UUID with a time component that is based on the supplied time-stamp.</td></tr><tr><td><a href="http://en.wikipedia.org/wiki/8601">iso8601 timestamp</a></td><td>timeuuid(“2011-02-01T14:00-0600”)</td><td>Creates a UUID with a time component that is based on the supplied time-stamp.</td></tr><tr><td><a href="http://tools.ietf.org/html/rfc4122">string representation (hex)</a></td><td>timeuuid(“e9229b24-2fbe-11e0-a4de-0026c650d722”)</td><td>Reproduces the specified version 1 UUID node-side.</td></tr></table></body></html>
\ No newline at end of file
Modified: cassandra/trunk/doc/cql/CQL.textile
URL: http://svn.apache.org/viewvc/cassandra/trunk/doc/cql/CQL.textile?rev=1068054&r1=1068053&r2=1068054&view=diff
==============================================================================
--- cassandra/trunk/doc/cql/CQL.textile (original)
+++ cassandra/trunk/doc/cql/CQL.textile Mon Feb 7 19:06:11 2011
@@ -202,3 +202,18 @@ String literals are any value enclosed i
h4. Integers / longs
Integers are any term consisting soley of unquoted numericals, longs are any otherwise valid integer term followed by an upper case "L", (e.g. 100L). It is an error to specify an integer term that will not fit in 4 bytes unsigned, or a long that will not fit in 8 bytes unsigned.
+
+h4. UUIDs
+
+There are two types of UUIDs supported by the CQL specification, time-based (version 1) and randomly generated (version 4). These are specified in statements using the @timeuuid(<UUID STRING>)@ and @uuid(<UUID STRING>)@ notations respectively.
+
+In addition to the hex-based string representation, @timeuuid()@ terms also accept arguments to specify the data-time component. The full list of @timeuuid()@ arguments are:
+
+|_. argument|_. example|_. behavior|
+|none|timeuuid()|Results in the creation of a new UUID based on system time of the node parsing the query.|
+|now|timeuuid("now")|Results in the creation of a new UUID based on system time of the node parsing the query.|
+|milliseconds since epoch|timeuuid(1296755320376)|Creates a UUID with a time component that is based on the supplied time-stamp.|
+|"iso8601 timestamp":http://en.wikipedia.org/wiki/8601|timeuuid("2011-02-01T14:00-0600")|Creates a UUID with a time component that is based on the supplied time-stamp.|
+|"string representation (hex)":http://tools.ietf.org/html/rfc4122|timeuuid("e9229b24-2fbe-11e0-a4de-0026c650d722")|Reproduces the specified version 1 UUID node-side.|
+
+
Modified: cassandra/trunk/src/java/org/apache/cassandra/cql/Cql.g
URL: http://svn.apache.org/viewvc/cassandra/trunk/src/java/org/apache/cassandra/cql/Cql.g?rev=1068054&r1=1068053&r2=1068054&view=diff
==============================================================================
--- cassandra/trunk/src/java/org/apache/cassandra/cql/Cql.g (original)
+++ cassandra/trunk/src/java/org/apache/cassandra/cql/Cql.g Mon Feb 7 19:06:11 2011
@@ -176,10 +176,12 @@ createKeyspaceStatement returns [CreateK
}
;
-// TODO: date/time, utf8
term returns [Term item]
- : ( t=STRING_LITERAL | t=LONG | t=INTEGER | t=UNICODE )
- { $item = new Term($t.text, $t.type); }
+ : ( t=timeuuid | t=uuid | t=literal ) { $item = t; }
+ ;
+
+literal returns [Term term]
+ : ( t=STRING_LITERAL | t=LONG | t=INTEGER | t=UNICODE ) { $term = new Term($t.text, $t.type); }
;
termList returns [List<Term> items]
@@ -224,11 +226,20 @@ selectExpression returns [SelectExpressi
truncateStatement returns [String cfam]
: K_TRUNCATE columnFamily=IDENT { $cfam = $columnFamily.text; } endStmnt
;
-
+
endStmnt
: (EOF | ';')
;
+uuid returns [Term term]
+ : 'uuid(' uuidstr=STRING_LITERAL ')' { return new Term($uuidstr.text, TermType.UUID); }
+ ;
+
+timeuuid returns [Term term]
+ : 'timeuuid(' uuidstr=( STRING_LITERAL | INTEGER | LONG )? ')' { return new Term($uuidstr.text, TermType.TIMEUUID); }
+ ;
+
+
// Case-insensitive keywords
K_SELECT: S E L E C T;
K_FROM: F R O M;
Modified: cassandra/trunk/src/java/org/apache/cassandra/cql/Term.java
URL: http://svn.apache.org/viewvc/cassandra/trunk/src/java/org/apache/cassandra/cql/Term.java?rev=1068054&r1=1068053&r2=1068054&view=diff
==============================================================================
--- cassandra/trunk/src/java/org/apache/cassandra/cql/Term.java (original)
+++ cassandra/trunk/src/java/org/apache/cassandra/cql/Term.java Mon Feb 7 19:06:11 2011
@@ -22,13 +22,32 @@ package org.apache.cassandra.cql;
import java.io.UnsupportedEncodingException;
import java.nio.ByteBuffer;
+import java.text.ParseException;
+import org.apache.cassandra.db.marshal.LexicalUUIDType;
+import org.apache.cassandra.db.marshal.TimeUUIDType;
import org.apache.cassandra.thrift.InvalidRequestException;
import org.apache.cassandra.utils.ByteBufferUtil;
+import org.apache.cassandra.utils.FBUtilities;
+import org.apache.cassandra.utils.UUIDGen;
+import org.apache.commons.lang.time.DateUtils;
/** A term parsed from a CQL statement. */
public class Term
{
+ private static String[] iso8601Patterns = new String[] {
+ "yyyy-MM-dd HH:mm",
+ "yyyy-MM-dd HH:mm:ss",
+ "yyyy-MM-dd HH:mmZ",
+ "yyyy-MM-dd HH:mm:ssZ",
+ "yyyy-MM-dd'T'HH:mm",
+ "yyyy-MM-dd'T'HH:mmZ",
+ "yyyy-MM-dd'T'HH:mm:ss",
+ "yyyy-MM-dd'T'HH:mm:ssZ",
+ "yyyy-MM-dd",
+ "yyyy-MM-ddZ"
+ };
+
private final String text;
private final TermType type;
@@ -41,10 +60,16 @@ public class Term
*/
public Term(String text, int type)
{
- this.text = text;
+ this.text = text == null ? "" : text;
this.type = TermType.forInt(type);
}
+ public Term(String text, TermType type)
+ {
+ this.text = text == null ? "" : text;
+ this.type = type;
+ }
+
protected Term()
{
this.text = "";
@@ -100,6 +125,53 @@ public class Term
{
throw new RuntimeException(e);
}
+ case UUID:
+ try
+ {
+ return LexicalUUIDType.instance.fromString(text);
+ }
+ catch (IllegalArgumentException e)
+ {
+ throw new InvalidRequestException(text + " is not valid for type uuid");
+ }
+ case TIMEUUID:
+ if (text.equals("") || text.toLowerCase().equals("now"))
+ {
+ return ByteBuffer.wrap(UUIDGen.decompose(UUIDGen.makeType1UUIDFromHost(FBUtilities.getLocalAddress())));
+ }
+
+ // Milliseconds since epoch?
+ if (text.matches("^\\d+$"))
+ {
+ try
+ {
+ return ByteBuffer.wrap(UUIDGen.getTimeUUIDBytes(Long.parseLong(text)));
+ }
+ catch (NumberFormatException e)
+ {
+ throw new InvalidRequestException(text + " is not valid for type timeuuid");
+ }
+ }
+
+ try
+ {
+ long timestamp = DateUtils.parseDate(text, iso8601Patterns).getTime();
+ return ByteBuffer.wrap(UUIDGen.getTimeUUIDBytes(timestamp));
+ }
+ catch (ParseException e1)
+ {
+ // Ignore failures; we'll move onto the Next Thing.
+ }
+
+ // Last chance, a UUID string (i.e. f79326be-2d7b-11e0-b074-0026c650d722)
+ try
+ {
+ return TimeUUIDType.instance.fromString(text);
+ }
+ catch (IllegalArgumentException e)
+ {
+ throw new InvalidRequestException(text + " is not valid for type timeuuid");
+ }
}
// FIXME: handle scenario that should never happen
@@ -125,7 +197,7 @@ public class Term
enum TermType
{
- STRING, LONG, INTEGER, UNICODE;
+ STRING, LONG, INTEGER, UNICODE, UUID, TIMEUUID;
static TermType forInt(int type)
{
Modified: cassandra/trunk/test/system/test_cql.py
URL: http://svn.apache.org/viewvc/cassandra/trunk/test/system/test_cql.py?rev=1068054&r1=1068053&r2=1068054&view=diff
==============================================================================
--- cassandra/trunk/test/system/test_cql.py (original)
+++ cassandra/trunk/test/system/test_cql.py Mon Feb 7 19:06:11 2011
@@ -1,6 +1,6 @@
from os.path import abspath, dirname, join
-import sys
+import sys, uuid, time
sys.path.append(join(abspath(dirname(__file__)), '../../drivers/py'))
@@ -15,6 +15,9 @@ def assert_raises(exception, method, *ar
except exception:
return
raise AssertionError("failed to see expected exception")
+
+def uuid1bytes_to_millis(uuidbytes):
+ return (uuid.UUID(bytes=uuidbytes).get_time() / 10000) - 12219292800000L
def load_sample(dbconn):
dbconn.execute("""
@@ -257,3 +260,76 @@ class TestCql(ThriftTester):
assert ksdef.strategy_class == strategy_class
assert ksdef.strategy_options['DC1'] == "1"
+ def test_time_uuid(self):
+ "store and retrieve time-based (type 1) uuids"
+ conn = init()
+
+ # Store and retrieve a timeuuid using it's hex-formatted string
+ timeuuid = uuid.uuid1()
+ conn.execute("""
+ UPDATE Standard2 SET timeuuid("%s") = 10 WHERE KEY = "uuidtest"
+ """ % str(timeuuid))
+
+ r = conn.execute("""
+ SELECT timeuuid("%s") FROM Standard2 WHERE KEY = "uuidtest"
+ """ % str(timeuuid))
+ assert r[0].columns[0].name == timeuuid.bytes
+
+ # Tests a node-side conversion from long to UUID.
+ ms = uuid1bytes_to_millis(uuid.uuid1().bytes)
+ conn.execute("""
+ UPDATE Standard2 SET "id" = timeuuid(%d) WHERE KEY = "uuidtest"
+ """ % ms)
+
+ r = conn.execute('SELECT "id" FROM Standard2 WHERE KEY = "uuidtest"')
+ assert uuid1bytes_to_millis(r[0].columns[0].value) == ms
+
+ # Tests a node-side conversion from ISO8601 to UUID.
+ conn.execute("""
+ UPDATE Standard2 SET "id2" = timeuuid("2011-01-31 17:00:00-0000")
+ WHERE KEY = "uuidtest"
+ """)
+
+ r = conn.execute('SELECT "id2" FROM Standard2 WHERE KEY = "uuidtest"')
+ # 2011-01-31 17:00:00-0000 == 1296493200000ms
+ ms = uuid1bytes_to_millis(r[0].columns[0].value)
+ assert ms == 1296493200000, \
+ "%d != 1296493200000 (2011-01-31 17:00:00-0000)" % ms
+
+ # Tests node-side conversion of empty term to UUID
+ conn.execute("""
+ UPDATE Standard2 SET "id3" = timeuuid() WHERE KEY = "uuidtest"
+ """)
+
+ r = conn.execute('SELECT "id3" FROM Standard2 WHERE KEY = "uuidtest"')
+ ms = uuid1bytes_to_millis(r[0].columns[0].value)
+ assert ((time.time() * 1e3) - ms) < 100, \
+ "timeuuid() not within 100ms of now (UPDATE vs. SELECT)"
+
+ # Tests node-side conversion of timeuuid("now") to UUID
+ conn.execute("""
+ UPDATE Standard2 SET "id4" = timeuuid("now") WHERE KEY = "uuidtest"
+ """)
+
+ r = conn.execute('SELECT "id4" FROM Standard2 WHERE KEY = "uuidtest"')
+ ms = uuid1bytes_to_millis(r[0].columns[0].value)
+ assert ((time.time() * 1e3) - ms) < 100, \
+ "timeuuid(\"now\") not within 100ms of now (UPDATE vs. SELECT)"
+
+ # TODO: slices of timeuuids from cf w/ TimeUUIDType comparator
+
+ def test_lexical_uuid(self):
+ "store and retrieve lexical uuids"
+ conn = init()
+ uid = uuid.uuid4()
+ conn.execute("""
+ UPDATE Standard2 SET uuid("%s") = 10 WHERE KEY = "uuidtest"
+ """ % str(uid))
+
+ r = conn.execute("""
+ SELECT uuid("%s") FROM Standard2 WHERE KEY = "uuidtest"
+ """ % str(uid))
+ assert r[0].columns[0].name == uid.bytes
+
+ # TODO: slices of uuids from cf w/ LexicalUUIDType comparator
+