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Posted to dev@hive.apache.org by "Suhas Satish (JIRA)" <ji...@apache.org> on 2014/10/27 22:47:36 UTC

[jira] [Commented] (HIVE-7613) Research optimization of auto convert join to map join [Spark branch]

    [ https://issues.apache.org/jira/browse/HIVE-7613?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=14185878#comment-14185878 ] 

Suhas Satish commented on HIVE-7613:
------------------------------------

Submitted patch for HIVE-8616. This can be used as the baseline patch for subsequent sub-tasks. 

> 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
>         Attachments: HIve on Spark Map join background.docx
>
>
> 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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