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https://issues.apache.org/jira/browse/HIVE-2340?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13622946#comment-13622946
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Ashutosh Chauhan commented on HIVE-2340:
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In PTF handling we do keep a copy of schema in Desc object to be used later at
runtime. This could be improved. Me and Harish are exploring that. But I think
Gunther's fix gets us around that, so for this patch I would recommend to go
ahead with Gunther's fix, since this is hanging on for more than 6 months and
no point in delaying it further. So, Navis if you are on board I will like to
get .14 patch in trunk.
> 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.D1209.6.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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