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From "Ashutosh Chauhan (JIRA)" <j...@apache.org>
Subject [jira] [Commented] (HIVE-4689) For outerjoins, joinEmitInterval might make wrong result
Date Tue, 02 Jul 2013 16:45:21 GMT

    [ https://issues.apache.org/jira/browse/HIVE-4689?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13697958#comment-13697958
] 

Ashutosh Chauhan commented on HIVE-4689:
----------------------------------------

Okies. Lets go ahead with current patch. +1
                
> 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
>         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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