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From " Brian Hess (JIRA)" <j...@apache.org>
Subject [jira] [Commented] (CASSANDRA-10707) Add support for Group By to Select statement
Date Thu, 31 Dec 2015 19:21:40 GMT

    [ https://issues.apache.org/jira/browse/CASSANDRA-10707?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=15076099#comment-15076099
] 

 Brian Hess commented on CASSANDRA-10707:
-----------------------------------------

[~blerer] - will this GROUP BY require a partitionKey predicate?  That is, will the following
be supported:
SELECT partitionKey, clusteringColumn1, Max(value) FROM myTable GROUP BY partitionKey, clusteringColumn1;
Or will it also require a partitionKey predicate like:
SELECT partitionKey, clusteringColumn1, Max(value) FROM myTable WHERE partitionKey=5 GROUP
BY partitionKey, clusteringColumn1;
Or will both be supported?

> Add support for Group By to Select statement
> --------------------------------------------
>
>                 Key: CASSANDRA-10707
>                 URL: https://issues.apache.org/jira/browse/CASSANDRA-10707
>             Project: Cassandra
>          Issue Type: Improvement
>          Components: CQL
>            Reporter: Benjamin Lerer
>            Assignee: Benjamin Lerer
>
> Now that Cassandra support aggregate functions, it makes sense to support {{GROUP BY}}
on the {{SELECT}} statements.
> It should be possible to group either at the partition level or at the clustering column
level.
> {code}
> SELECT partitionKey, max(value) FROM myTable GROUP BY partitionKey;
> SELECT partitionKey, clustering0, clustering1, max(value) FROM myTable GROUP BY partitionKey,
clustering0, clustering1; 
> {code}



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