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From "Phabricator (JIRA)" <>
Subject [jira] [Commented] (HIVE-2340) optimize orderby followed by a groupby
Date Fri, 01 Feb 2013 04:25:17 GMT


Phabricator commented on HIVE-2340:

navis has commented on the revision "HIVE-2340 [jira] optimize orderby followed by a groupby".

  common/src/java/org/apache/hadoop/hive/conf/ Yes, it is. There should be
a better configuration if possible.
  ql/src/java/org/apache/hadoop/hive/ql/optimizer/ Yes, should
be 'fixed' as sorted state. I'll rename it.
  I think there should be a configuration preventing MAPJOINable JOIN from being merged with
next RS. But seemed hard to know if it's mapjoinable. Any idea?
  ql/src/java/org/apache/hadoop/hive/ql/ppd/ Yes, typos.
I'll remove this from patch.
  ql/src/test/queries/clientpositive/reduce_deduplicate.q:7 ok.


To: JIRA, navis
Cc: hagleitn

> optimize orderby followed by a groupby
> --------------------------------------
>                 Key: HIVE-2340
>                 URL:
>             Project: Hive
>          Issue Type: Sub-task
>          Components: Query Processor
>            Reporter: Navis
>            Assignee: Navis
>            Priority: Minor
>              Labels: perfomance
>         Attachments: ASF.LICENSE.NOT.GRANTED--HIVE-2340.D1209.1.patch, ASF.LICENSE.NOT.GRANTED--HIVE-2340.D1209.2.patch,
ASF.LICENSE.NOT.GRANTED--HIVE-2340.D1209.5.patch, HIVE-2340.1.patch.txt, HIVE-2340.D1209.6.patch,
HIVE-2340.D1209.7.patch, HIVE-2340.D1209.8.patch, HIVE-2340.D1209.9.patch, testclidriver.txt
> Before implementing optimizer for JOIN-GBY, try to implement RS-GBY optimizer(cluster-by
following group-by).

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