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From "Aman Sinha (JIRA)" <j...@apache.org>
Subject [jira] [Commented] (DRILL-646) Generate broadcast-inner plans for MergeJoin and HashJoin
Date Tue, 13 May 2014 02:16:18 GMT

    [ https://issues.apache.org/jira/browse/DRILL-646?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13995952#comment-13995952
] 

Aman Sinha commented on DRILL-646:
----------------------------------

Uploaded patch for broadcast-inner plans for hash join and merge join.  The behavior is controlled
by a planner option 'planner.enable_broadcast_join' which by default is false for now but
will be enabled later.  

> Generate broadcast-inner plans for MergeJoin and HashJoin
> ---------------------------------------------------------
>
>                 Key: DRILL-646
>                 URL: https://issues.apache.org/jira/browse/DRILL-646
>             Project: Apache Drill
>          Issue Type: Bug
>          Components: Query Planning & Optimization
>            Reporter: Aman Sinha
>            Assignee: Aman Sinha
>         Attachments: 0001-Broadcast-inner-plans-for-Hash-Join-and-Merge-Join.-.patch
>
>
> We want to be able to generate MergeJoin and HashJoin plans where the inner child is
broadcast and outer child can be left as-is  (i.e ANY distribution is acceptable).  Such plans
will be compared by cost with plans where both children are hash-distributed or any new plans
that we add.  



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