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From "He Yongqiang (JIRA)" <j...@apache.org>
Subject [jira] Updated: (HIVE-1246) mapjoin followed by another mapjoin should be performed in a single query
Date Tue, 16 Mar 2010 06:54:27 GMT

     [ https://issues.apache.org/jira/browse/HIVE-1246?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
]

He Yongqiang updated HIVE-1246:
-------------------------------

    Attachment: hive-1246.1.patch

hive-1246.1.patch passed all tests in my local test.

> mapjoin followed by another mapjoin should be performed in a single query
> -------------------------------------------------------------------------
>
>                 Key: HIVE-1246
>                 URL: https://issues.apache.org/jira/browse/HIVE-1246
>             Project: Hadoop Hive
>          Issue Type: Improvement
>          Components: Query Processor
>            Reporter: Namit Jain
>            Assignee: He Yongqiang
>             Fix For: 0.6.0
>
>         Attachments: hive-1246.1.patch
>
>
> A query like:
> select /*+ MAPJOIN(c) */ ..
> from
> (select /*+ MAPJOIN(b) */ ..
> from a join b on k1) subq1
> join 
> c
> on k2
> should be performed in a single map-only job

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