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https://issues.apache.org/jira/browse/HIVE-7613?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=14260943#comment-14260943
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Lefty Leverenz commented on HIVE-7613:
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Should this join design doc be added to the wiki? Or if not, should the
existing "Hive on Spark: Getting Started" include a link to it?
* [Hive on Spark: Getting Started |
https://cwiki.apache.org/confluence/display/Hive/Hive+on+Spark%3A+Getting+Started]
> Research optimization of auto convert join to map join [Spark branch]
> ---------------------------------------------------------------------
>
> Key: HIVE-7613
> URL: https://issues.apache.org/jira/browse/HIVE-7613
> Project: Hive
> Issue Type: Sub-task
> Components: Spark
> Reporter: Chengxiang Li
> Assignee: Suhas Satish
> Priority: Minor
> Fix For: spark-branch
>
> Attachments: HIve on Spark Map join background.docx, Hive on Spark
> Join Master Design.pdf, small_table_broadcasting.pdf
>
>
> ConvertJoinMapJoin is an optimization the replaces a common join(aka shuffle
> join) with a map join(aka broadcast or fragment replicate join) when
> possible. we need to research how to make it workable with Hive on Spark.
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