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Posted to dev@drill.apache.org by "Aman Sinha (JIRA)" <ji...@apache.org> on 2014/05/13 04:16:18 UTC
[jira] [Commented] (DRILL-646) Generate broadcast-inner plans for
MergeJoin and HashJoin
[ 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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