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Posted to dev@hive.apache.org by "Namit Jain (JIRA)" <ji...@apache.org> on 2012/12/06 09:33:00 UTC

[jira] [Updated] (HIVE-3774) Sort merge join should work if join cols are a prefix of sort columns for each partition

     [ https://issues.apache.org/jira/browse/HIVE-3774?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ]

Namit Jain updated HIVE-3774:
-----------------------------

    Attachment: hive.3774.1.patch
    
> Sort merge join should work if join cols are a prefix of sort columns for each partition
> ----------------------------------------------------------------------------------------
>
>                 Key: HIVE-3774
>                 URL: https://issues.apache.org/jira/browse/HIVE-3774
>             Project: Hive
>          Issue Type: Bug
>          Components: Query Processor
>            Reporter: Namit Jain
>            Assignee: Namit Jain
>         Attachments: hive.3774.1.patch
>
>
> Currently, a join is converted into a sort-merge join only if the join cols exactly matches the sort cols.
> This constraint can definitely be relaxed.

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