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From "Hudson (JIRA)" <j...@apache.org>
Subject [jira] [Commented] (HIVE-4689) For outerjoins, joinEmitInterval might make wrong result
Date Wed, 03 Jul 2013 16:02:24 GMT

    [ https://issues.apache.org/jira/browse/HIVE-4689?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13699114#comment-13699114
] 

Hudson commented on HIVE-4689:
------------------------------

Integrated in Hive-trunk-h0.21 #2177 (See [https://builds.apache.org/job/Hive-trunk-h0.21/2177/])
    HIVE-4689 : For outerjoins, joinEmitInterval might make wrong result (Navis via Ashutosh
Chauhan) (Revision 1499453)

     Result = FAILURE
hashutosh : http://svn.apache.org/viewcvs.cgi/?root=Apache-SVN&view=rev&rev=1499453
Files : 
* /hive/trunk/ql/src/java/org/apache/hadoop/hive/ql/exec/JoinOperator.java
* /hive/trunk/ql/src/test/results/clientpositive/join_1to1.q.out

                
> For outerjoins, joinEmitInterval might make wrong result
> --------------------------------------------------------
>
>                 Key: HIVE-4689
>                 URL: https://issues.apache.org/jira/browse/HIVE-4689
>             Project: Hive
>          Issue Type: Bug
>          Components: Query Processor
>    Affects Versions: 0.11.0
>            Reporter: Navis
>            Assignee: Navis
>             Fix For: 0.12.0
>
>         Attachments: HIVE-4689.D11211.1.patch
>
>
> Alias filter tag is calculated for each group and used for outer joins. But if joinEmitInterval
is smaller than the group size, pre-matured alias filter tag would be used and might introduce
different(wrong) result.
> It can be observed in join_1to1.q test but I cannot imagine proper solution which does
not override intention of joinEmitInterval. Should it be disabled for outer joins?

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