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From "Namit Jain (JIRA)" <j...@apache.org>
Subject [jira] Commented: (HIVE-1534) Join filters do not work correctly with outer joins
Date Fri, 17 Sep 2010 17:17:33 GMT

    [ https://issues.apache.org/jira/browse/HIVE-1534?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=12910669#action_12910669
] 

Namit Jain commented on HIVE-1534:
----------------------------------

bq. I think it makes sense to push the filters on partitioned columns and not output all the
table for outer join. Patch pushes filters on partitioned columns, even for outer joins. Thoughts?

I dont think it is a good idea to special case partitioned columns - can you treat them like
any other column



> Join filters do not work correctly with outer joins
> ---------------------------------------------------
>
>                 Key: HIVE-1534
>                 URL: https://issues.apache.org/jira/browse/HIVE-1534
>             Project: Hadoop Hive
>          Issue Type: Bug
>          Components: Query Processor
>            Reporter: Amareshwari Sriramadasu
>            Assignee: Amareshwari Sriramadasu
>         Attachments: patch-1534-1.txt, patch-1534-2.txt, patch-1534.txt
>
>
>  SELECT * FROM T1 LEFT OUTER JOIN T2 ON (T1.c1=T2.c2 AND T1.c1 < 10)
> and  SELECT * FROM T1 RIGHT OUTER JOIN T2 ON (T1.c1=T2.c2 AND T2.c1 < 10)
> do not give correct results.

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