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From "Jesus Camacho Rodriguez (JIRA)" <j...@apache.org>
Subject [jira] [Comment Edited] (HIVE-14002) Extend limit propagation to subsequent RS operators
Date Thu, 16 Jun 2016 14:15:05 GMT

    [ https://issues.apache.org/jira/browse/HIVE-14002?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=15333863#comment-15333863
] 

Jesus Camacho Rodriguez edited comment on HIVE-14002 at 6/16/16 2:14 PM:
-------------------------------------------------------------------------

Reverted patch and reopening issue, as QA results seemed to be incorrect.


was (Author: jcamachorodriguez):
Reopening issue, as QA results seemed to be incorrect.

> Extend limit propagation to subsequent RS operators
> ---------------------------------------------------
>
>                 Key: HIVE-14002
>                 URL: https://issues.apache.org/jira/browse/HIVE-14002
>             Project: Hive
>          Issue Type: Improvement
>          Components: Physical Optimizer
>    Affects Versions: 2.1.0
>            Reporter: Nita Dembla
>            Assignee: Jesus Camacho Rodriguez
>         Attachments: HIVE-14002.01.patch, HIVE-14002.patch
>
>
> In some occasions, for instance when RS dedup does not kick in, it is useful to propagate
the limit to subsequent RS operators, as this will reduce intermediary results and impact
performance. This issue covers that extension.



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