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From "Phabricator (Commented) (JIRA)" <j...@apache.org>
Subject [jira] [Commented] (HIVE-2642) fix Hive-2566 and make union optimization more aggressive
Date Wed, 21 Dec 2011 17:13:32 GMT

    [ https://issues.apache.org/jira/browse/HIVE-2642?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13174227#comment-13174227
] 

Phabricator commented on HIVE-2642:
-----------------------------------

njain has commented on the revision "HIVE-2642 [jira] fix Hive-2566 and make union optimization
more aggressive".

INLINE COMMENTS
  ql/src/java/org/apache/hadoop/hive/ql/optimizer/GenMRUnion1.java:245 remove this comment

REVISION DETAIL
  https://reviews.facebook.net/D735

                
> fix Hive-2566 and make union optimization more aggressive 
> ----------------------------------------------------------
>
>                 Key: HIVE-2642
>                 URL: https://issues.apache.org/jira/browse/HIVE-2642
>             Project: Hive
>          Issue Type: Improvement
>            Reporter: He Yongqiang
>            Assignee: He Yongqiang
>         Attachments: HIVE-2642.D735.1.patch
>
>
> Hive-2566 did some optimizations to union, but cause some problems. And then got reverted.
This is to get it back and fix the problems we saw, and also make union optimization more
aggressive.

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