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From "Ashutosh Chauhan (JIRA)" <j...@apache.org>
Subject [jira] [Commented] (HIVE-12325) Turn hive.map.groupby.sorted on by default
Date Thu, 05 Nov 2015 19:07:27 GMT

    [ https://issues.apache.org/jira/browse/HIVE-12325?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=14992263#comment-14992263
] 

Ashutosh Chauhan commented on HIVE-12325:
-----------------------------------------

Actually we should remove test config. I dont see any value of it. We should just have one
config to turn on/off the optimization.

> Turn hive.map.groupby.sorted on by default
> ------------------------------------------
>
>                 Key: HIVE-12325
>                 URL: https://issues.apache.org/jira/browse/HIVE-12325
>             Project: Hive
>          Issue Type: Improvement
>          Components: Logical Optimizer
>            Reporter: Ashutosh Chauhan
>
> When applicable it can avoid shuffle phase altogether for group by, which will be a performance
win. 



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