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From "Navis (JIRA)" <>
Subject [jira] [Commented] (HIVE-2340) optimize orderby followed by a groupby
Date Thu, 04 Apr 2013 23:02:16 GMT


Navis commented on HIVE-2340:

CP for RS is correctly modifies schema of RS, and it makes CP tests for PTF fail. But as suggested
by Hagleitner, after making schema of RS intact even after CP, those tests are resulted to
success. I believe there is some assumption on schema in CP for PTF.
> 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-2340.12.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.D1209.6.patch, HIVE-2340.D1209.7.patch, HIVE-2340.D1209.8.patch, HIVE-2340.D1209.9.patch,
> Before implementing optimizer for JOIN-GBY, try to implement RS-GBY optimizer(cluster-by
following group-by).

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