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https://issues.apache.org/jira/browse/HIVE-11775?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=15111655#comment-15111655
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Lefty Leverenz commented on HIVE-11775:
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Looks good, thanks [~pxiong]. I edited the links a bit and removed the
TODOC2.0 label.
Here are the new links:
* [Configuration Properties -- hive.optimize.limittranspose |
https://cwiki.apache.org/confluence/display/Hive/Configuration+Properties#ConfigurationProperties-hive.optimize.limittranspose]
* [Configuration Properties -- hive.optimize.limittranspose.reductionpercentage
|
https://cwiki.apache.org/confluence/display/Hive/Configuration+Properties#ConfigurationProperties-hive.optimize.limittranspose.reductionpercentage]
* [Configuration Properties -- hive.optimize.limittranspose.reductiontuples |
https://cwiki.apache.org/confluence/display/Hive/Configuration+Properties#ConfigurationProperties-hive.optimize.limittranspose.reductiontuples]
> Implement limit push down through union all in CBO
> --------------------------------------------------
>
> Key: HIVE-11775
> URL: https://issues.apache.org/jira/browse/HIVE-11775
> Project: Hive
> Issue Type: New Feature
> Affects Versions: 1.2.1
> Reporter: Pengcheng Xiong
> Assignee: Pengcheng Xiong
> Fix For: 2.0.0, 2.1.0
>
> Attachments: HIVE-11775.01.patch, HIVE-11775.02.patch,
> HIVE-11775.03.patch, HIVE-11775.04.patch, HIVE-11775.05.patch,
> HIVE-11775.06.patch, HIVE-11775.07.patch, HIVE-11775.08.patch,
> HIVE-11775.09.patch, HIVE-11775.10.patch, HIVE-11775.11.patch,
> HIVE-11775.12.patch, HIVE-11775.13.patch
>
>
> Enlightened by HIVE-11684 (Kudos to [~jcamachorodriguez]), we can actually
> push limit down through union all, which reduces the intermediate number of
> rows in union branches.
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