[jira] [Commented] (HIVE-9824) LLAP: Native Vectorization of Map Join

["Lefty Leverenz (JIRA)" <ji...@apache.org>]

    [ https://issues.apache.org/jira/browse/HIVE-9824?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=14508178#comment-14508178 ] 

Lefty Leverenz commented on HIVE-9824:
--------------------------------------

Doc note:  This adds 5 configuration parameters (and changes indentation of the descriptions for 2 others).

*  hive.vectorized.execution.mapjoin.native.enabled
*  hive.vectorized.execution.mapjoin.native.multikey.only.enabled
*  hive.vectorized.execution.mapjoin.minmax.enabled
*  hive.vectorized.execution.mapjoin.overflow.repeated.threshold
*  hive.vectorized.execution.mapjoin.native.fast.hashtable.enabled

The new parameters need to be documented in the Vectorization section of Configuration Properties:

* [Configuration Properties -- Vectorization | https://cwiki.apache.org/confluence/display/Hive/Configuration+Properties#ConfigurationProperties-Vectorization]

Is any other documentation needed?

> LLAP: Native Vectorization of Map Join
> --------------------------------------
>
>                 Key: HIVE-9824
>                 URL: https://issues.apache.org/jira/browse/HIVE-9824
>             Project: Hive
>          Issue Type: Sub-task
>            Reporter: Matt McCline
>            Assignee: Matt McCline
>            Priority: Critical
>              Labels: TODOC1.2
>             Fix For: 1.2.0
>
>         Attachments: HIVE-9824.01.patch, HIVE-9824.02.patch, HIVE-9824.04.patch, HIVE-9824.06.patch, HIVE-9824.07.patch, HIVE-9824.08.patch, HIVE-9824.09.patch
>
>
> Today's VectorMapJoinOperator is a pass-through that converts each row from a vectorized row batch in a Java Object[] row and passes it to the MapJoinOperator superclass.
> This enhancement creates specialized vectorized map join operator classes that are optimized.



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