hive-dev mailing list archives

Site index · List index
Message view « Date » · « Thread »
Top « Date » · « Thread »
From "Ashutosh Chauhan (JIRA)" <>
Subject [jira] [Commented] (HIVE-4689) For outerjoins, joinEmitInterval might make wrong result
Date Sun, 30 Jun 2013 05:13:20 GMT


Ashutosh Chauhan commented on HIVE-4689:

[~navis] I think we should disable joinEmitInterval altogether for outer joins.
> For outerjoins, joinEmitInterval might make wrong result
> --------------------------------------------------------
>                 Key: HIVE-4689
>                 URL:
>             Project: Hive
>          Issue Type: Bug
>          Components: Query Processor
>            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?

This message is automatically generated by JIRA.
If you think it was sent incorrectly, please contact your JIRA administrators
For more information on JIRA, see:

View raw message