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From "Hudson (JIRA)" <j...@apache.org>
Subject [jira] [Commented] (HIVE-4105) Hive MapJoinOperator unnecessarily deserializes values for all join-keys
Date Wed, 17 Apr 2013 01:30:17 GMT

    [ https://issues.apache.org/jira/browse/HIVE-4105?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13633660#comment-13633660
] 

Hudson commented on HIVE-4105:
------------------------------

Integrated in Hive-trunk-h0.21 #2067 (See [https://builds.apache.org/job/Hive-trunk-h0.21/2067/])
    HIVE-4105 : Hive MapJoinOperator unnecessarily deserializes values for all join-keys (Vinod
KV via Ashutosh Chauhan) (Revision 1468433)

     Result = FAILURE
hashutosh : http://svn.apache.org/viewcvs.cgi/?root=Apache-SVN&view=rev&rev=1468433
Files : 
* /hive/trunk/ql/src/java/org/apache/hadoop/hive/ql/exec/MapJoinOperator.java

                
> Hive MapJoinOperator unnecessarily deserializes values for all join-keys
> ------------------------------------------------------------------------
>
>                 Key: HIVE-4105
>                 URL: https://issues.apache.org/jira/browse/HIVE-4105
>             Project: Hive
>          Issue Type: Bug
>            Reporter: Vinod Kumar Vavilapalli
>            Assignee: Vinod Kumar Vavilapalli
>             Fix For: 0.12.0
>
>         Attachments: HIVE-4105-20130301.1.txt, HIVE-4105-20130301.txt, HIVE-4105-20130415.txt,
HIVE-4105.patch
>
>
> We can avoid this for inner-joins. Hive does an explicit value de-serialization up front
so even for those rows which won't emit output. In these cases, we can do just with key de-serialization.

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