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From "Ahmet AKYOL (JIRA)" <j...@apache.org>
Subject [jira] [Created] (CASSANDRA-5313) add a cardinality function for collection types ( CQL3 )
Date Tue, 05 Mar 2013 10:47:16 GMT
Ahmet AKYOL created CASSANDRA-5313:
--------------------------------------

             Summary: add a cardinality function for collection types ( CQL3 )
                 Key: CASSANDRA-5313
                 URL: https://issues.apache.org/jira/browse/CASSANDRA-5313
             Project: Cassandra
          Issue Type: Improvement
            Reporter: Ahmet AKYOL


Currently , cql3 doesn't provide a cardinality function for collection types. It'll be great
to have one:

{code}
select content, cardinality(like_set),cardinality(dislike_set) from comments;
{code}

or size as keyword
{code}
select content, size(like_set),size(dislike_set) from comments;
{code}

Something similar in SQL is [cardinality of nested tables|http://www.techonthenet.com/oracle/functions/cardinality.php]
.

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