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From "He Yongqiang (JIRA)" <j...@apache.org>
Subject [jira] Updated: (HIVE-1213) sort-merge join does not work for sub-queries
Date Tue, 09 Mar 2010 06:35:27 GMT

     [ https://issues.apache.org/jira/browse/HIVE-1213?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
]

He Yongqiang updated HIVE-1213:
-------------------------------

    Attachment: Hive-1213.1.patch

Still need one more change to convert the mapjoin to a sorted merge map join. Will update
the patch after that change.

> sort-merge join does not work for sub-queries
> ---------------------------------------------
>
>                 Key: HIVE-1213
>                 URL: https://issues.apache.org/jira/browse/HIVE-1213
>             Project: Hadoop Hive
>          Issue Type: Bug
>          Components: Query Processor
>            Reporter: Namit Jain
>            Assignee: He Yongqiang
>             Fix For: 0.6.0
>
>         Attachments: Hive-1213.1.patch
>
>
> A query like:
> select count(1) from (select /*+ MAPJOIN(x) */ from x join y ON ... ) subq;
> does not work - since there is no mapping between the join operator and the corresponding
source

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