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From "Remus Rusanu (JIRA)" <j...@apache.org>
Subject [jira] [Updated] (HIVE-6222) Make Vector Group By operator abandon grouping if too many distinct keys
Date Mon, 10 Mar 2014 08:08:47 GMT

     [ https://issues.apache.org/jira/browse/HIVE-6222?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
]

Remus Rusanu updated HIVE-6222:
-------------------------------

    Labels: vectorization  (was: )

> Make Vector Group By operator abandon grouping if too many distinct keys
> ------------------------------------------------------------------------
>
>                 Key: HIVE-6222
>                 URL: https://issues.apache.org/jira/browse/HIVE-6222
>             Project: Hive
>          Issue Type: Sub-task
>          Components: Query Processor
>    Affects Versions: 0.13.0
>            Reporter: Remus Rusanu
>            Assignee: Remus Rusanu
>            Priority: Minor
>              Labels: vectorization
>         Attachments: HIVE-6222.1.patch, HIVE-6222.2.patch
>
>
> Row mode GBY is becoming a pass-through if not enough aggregation occurs on the map side,
relying on the shuffle+reduce side to do the work. Have VGBY do the same.



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