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From "Xuefu Zhang (JIRA)" <j...@apache.org>
Subject [jira] [Assigned] (HIVE-7613) Research optimization of auto convert join to map join [Spark branch]
Date Thu, 11 Sep 2014 00:19:34 GMT

     [ https://issues.apache.org/jira/browse/HIVE-7613?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
]

Xuefu Zhang reassigned HIVE-7613:
---------------------------------

    Assignee: Suhas Satish  (was: Szehon Ho)

Suhas has indicated his interest in working in map-join. Since Szehon is on vacation, I'm
assigning this to Suhas so as to continue the research for now.

I think we should have a design for this before we actually run into coding.

> 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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