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From "Chao (JIRA)" <j...@apache.org>
Subject [jira] [Commented] (HIVE-8911) Enable mapjoin hints [Spark Branch]
Date Wed, 10 Dec 2014 04:11:12 GMT

    [ https://issues.apache.org/jira/browse/HIVE-8911?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=14240616#comment-14240616
] 

Chao commented on HIVE-8911:
----------------------------

Hmm, don't know why bucketmapjoin8 and bucketmapjoin11 failed. These two passed on my machine.

> Enable mapjoin hints [Spark Branch]
> -----------------------------------
>
>                 Key: HIVE-8911
>                 URL: https://issues.apache.org/jira/browse/HIVE-8911
>             Project: Hive
>          Issue Type: Sub-task
>          Components: Spark
>    Affects Versions: spark-branch
>            Reporter: Szehon Ho
>            Assignee: Chao
>         Attachments: HIVE-8911.1-spark.patch, HIVE-8911.2-spark.patch
>
>
> Currently the big table selection in a mapjoin is based on stats.
> We should also enable the big-table selection based on hints.  See class MapJoinProcessor.
 This is a logical-optimizer class, so we should be able to re-use this without too many changes
to hook up with SparkMapJoinResolver.



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