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From "Hudson (JIRA)" <j...@apache.org>
Subject [jira] [Commented] (HIVE-3774) Sort merge join should work if join cols are a prefix of sort columns for each partition
Date Wed, 09 Jan 2013 10:31:15 GMT

    [ https://issues.apache.org/jira/browse/HIVE-3774?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13548258#comment-13548258
] 

Hudson commented on HIVE-3774:
------------------------------

Integrated in Hive-trunk-hadoop2 #54 (See [https://builds.apache.org/job/Hive-trunk-hadoop2/54/])
    HIVE-3774. Sort merge join should work if join cols are a prefix of sort columns for each
partition. (njain via kevinwilfong) (Revision 1424083)

     Result = ABORTED
kevinwilfong : http://svn.apache.org/viewcvs.cgi/?root=Apache-SVN&view=rev&rev=1424083
Files : 
* /hive/trunk/ql/src/java/org/apache/hadoop/hive/ql/optimizer/SortedMergeBucketMapJoinOptimizer.java
* /hive/trunk/ql/src/test/queries/clientpositive/smb_mapjoin_15.q
* /hive/trunk/ql/src/test/results/clientpositive/smb_mapjoin_15.q.out

                
> Sort merge join should work if join cols are a prefix of sort columns for each partition
> ----------------------------------------------------------------------------------------
>
>                 Key: HIVE-3774
>                 URL: https://issues.apache.org/jira/browse/HIVE-3774
>             Project: Hive
>          Issue Type: Bug
>          Components: Query Processor
>            Reporter: Namit Jain
>            Assignee: Namit Jain
>             Fix For: 0.11.0
>
>         Attachments: hive.3774.1.patch, hive.3774.2.patch, hive.3774.3.patch
>
>
> Currently, a join is converted into a sort-merge join only if the join cols exactly matches
the sort cols.
> This constraint can definitely be relaxed.

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