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From "Namit Jain (Commented) (JIRA)" <j...@apache.org>
Subject [jira] [Commented] (HIVE-2642) fix Hive-2566 and make union optimization more aggressive
Date Wed, 21 Dec 2011 17:01:33 GMT

    [ https://issues.apache.org/jira/browse/HIVE-2642?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13174211#comment-13174211
] 

Namit Jain commented on HIVE-2642:
----------------------------------

1 general comment about the new test union26.q --

Reduce the test output, I mean, you dont need to load all 500 rows for this test.
It makes the test output really difficult to review.

Again, all the above 3 are not blockers - I am still reviewing, I will file a enhancement
for all the follow-ups.
                
> 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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