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Posted to dev@hive.apache.org by "Remus Rusanu (JIRA)" <ji...@apache.org> on 2013/06/08 18:09:20 UTC

[jira] [Commented] (HIVE-4606) Implement vector group by hash spill

    [ https://issues.apache.org/jira/browse/HIVE-4606?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13678755#comment-13678755 ] 

Remus Rusanu commented on HIVE-4606:
------------------------------------

https://reviews.apache.org/r/11747/
                
> Implement vector group by hash spill
> ------------------------------------
>
>                 Key: HIVE-4606
>                 URL: https://issues.apache.org/jira/browse/HIVE-4606
>             Project: Hive
>          Issue Type: Sub-task
>          Components: Query Processor
>    Affects Versions: vectorization-branch
>            Reporter: Remus Rusanu
>            Assignee: Remus Rusanu
>             Fix For: vectorization-branch
>
>         Attachments: HIVE-4606.1.patch.txt
>
>
> the row mode GBy operator is capable of spilling the hash map (by emitting it into the M/R and deleting the keys emitted) to conform to emmory constraints. The VGBy should be able to do the same.

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