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From "jiraposter@reviews.apache.org (Commented) (JIRA)" <j...@apache.org>
Subject [jira] [Commented] (HIVE-2340) optimize orderby followed by a groupby
Date Tue, 06 Dec 2011 11:03:41 GMT

    [ https://issues.apache.org/jira/browse/HIVE-2340?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13163523#comment-13163523
] 

jiraposter@reviews.apache.org commented on HIVE-2340:
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This is an automatically generated e-mail. To reply, visit:
https://reviews.apache.org/r/2991/
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(Updated 2011-12-06 11:02:00.777597)


Review request for hive and Carl Steinbach.


Changes
-------

I've overrode existing optimizer by mistake. Fixed it.


Summary
-------

Mostly copied from existing code. Not tested intensively yet, but it is seemed to be used
frequently for us.


This addresses bug HIVE-2340.
    https://issues.apache.org/jira/browse/HIVE-2340


Diffs (updated)
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  ql/src/java/org/apache/hadoop/hive/ql/optimizer/ColumnPrunerProcFactory.java 82a141d 
  ql/src/java/org/apache/hadoop/hive/ql/optimizer/ReduceSinkDeDuplication.java e91b4d5 
  ql/src/test/queries/clientpositive/reduce_deduplicate_extended.q PRE-CREATION 
  ql/src/test/results/clientpositive/reduce_deduplicate_extended.q.out PRE-CREATION 

Diff: https://reviews.apache.org/r/2991/diff


Testing
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new test cases added : reduce_deduplicate_extended.q


Thanks,

Navis


                
> optimize orderby followed by a groupby
> --------------------------------------
>
>                 Key: HIVE-2340
>                 URL: https://issues.apache.org/jira/browse/HIVE-2340
>             Project: Hive
>          Issue Type: Sub-task
>          Components: Query Processor
>            Reporter: Navis
>            Priority: Minor
>         Attachments: HIVE-2340.1.patch.txt
>
>
> Before implementing optimizer for JOIN-GBY, try to implement RS-GBY optimizer(cluster-by
following group-by).

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