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Posted to issues@hive.apache.org by "Chetna Chaudhari (JIRA)" <ji...@apache.org> on 2015/11/06 05:44:27 UTC

[jira] [Updated] (HIVE-12325) Turn hive.map.groupby.sorted on by default

     [ https://issues.apache.org/jira/browse/HIVE-12325?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ]

Chetna Chaudhari updated HIVE-12325:
------------------------------------
    Attachment: HIVE-12325.1.patch

Have removed {{hive.map.groupby.sorted.testmode}} and updated patch. Please review.

> 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
>            Assignee: Chetna Chaudhari
>         Attachments: HIVE-12325.1.patch
>
>
> When applicable it can avoid shuffle phase altogether for group by, which will be a performance win. 



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