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From "Vikram Dixit K (JIRA)" <j...@apache.org>
Subject [jira] [Commented] (HIVE-4611) SMB joins fail based on bigtable selection policy.
Date Tue, 23 Jul 2013 16:40:49 GMT

    [ https://issues.apache.org/jira/browse/HIVE-4611?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13716569#comment-13716569
] 

Vikram Dixit K commented on HIVE-4611:
--------------------------------------

Review board request:

https://reviews.apache.org/r/12827/
                
> SMB joins fail based on bigtable selection policy.
> --------------------------------------------------
>
>                 Key: HIVE-4611
>                 URL: https://issues.apache.org/jira/browse/HIVE-4611
>             Project: Hive
>          Issue Type: Bug
>          Components: Query Processor
>    Affects Versions: 0.11.0
>            Reporter: Vikram Dixit K
>            Assignee: Vikram Dixit K
>             Fix For: 0.11.1
>
>         Attachments: HIVE-4611.2.patch, HIVE-4611.3.patch, HIVE-4611.4.patch, HIVE-4611.patch
>
>
> The default setting for hive.auto.convert.sortmerge.join.bigtable.selection.policy will
choose the big table as the one with largest average partition size. However, this can result
in a query failing because this policy conflicts with the big table candidates chosen for
outer joins. This policy should just be a tie breaker and not have the ultimate say in the
choice of tables.

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