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From "Navis (JIRA)" <j...@apache.org>
Subject [jira] [Commented] (HIVE-2340) optimize orderby followed by a groupby
Date Sun, 07 Apr 2013 09:03:17 GMT

    [ https://issues.apache.org/jira/browse/HIVE-2340?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13624794#comment-13624794
] 

Navis commented on HIVE-2340:
-----------------------------

When auto.convert.join is true(default for now), RSDedup cannot try to merge following RS,
effectively disabling the code part. I think physical planning should be postponed to completion
time of each task. I'll update test results.
                
> 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
>            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.D1209.3.patch, ASF.LICENSE.NOT.GRANTED--HIVE-2340.D1209.4.patch,
ASF.LICENSE.NOT.GRANTED--HIVE-2340.D1209.5.patch, HIVE-2340.12.patch, HIVE-2340.13.patch,
HIVE-2340.14.patch, HIVE-2340.14.rebased_and_schema_clone.patch, HIVE-2340.1.patch.txt, HIVE-2340.D1209.10.patch,
HIVE-2340.D1209.11.patch, HIVE-2340.D1209.12.patch, HIVE-2340.D1209.13.patch, HIVE-2340.D1209.14.patch,
HIVE-2340.D1209.15.patch, 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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