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https://issues.apache.org/jira/browse/HIVE-7613?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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Szehon Ho updated HIVE-7613:
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Attachment: Hive on Spark Join Master Design.pdf
Attaching the master design-doc that describes all the Hive on Spark join
optimizations, not just mapjoin but all the optimized joins. It's now updated
to match latest codebase, so can be useful for future code-maintenance.
> 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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