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From "Ashutosh Chauhan (JIRA)" <j...@apache.org>
Subject [jira] [Commented] (HIVE-4041) Support multiple partitionings in a single Query
Date Thu, 07 Mar 2013 21:38:13 GMT

    [ https://issues.apache.org/jira/browse/HIVE-4041?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13596406#comment-13596406
] 

Ashutosh Chauhan commented on HIVE-4041:
----------------------------------------

Went through the design doc. Thanks, Harish for writing this up. 
In light of discussion over on HIVE-4108 you may want to update section 3. Also, section 4
needs to be updated because of it. I believe because of dropping of implicit partitioning
concept, design (and thus implementation) will be cleaner (and thus easier), which is a good
thing.
                
> Support multiple partitionings in a single Query
> ------------------------------------------------
>
>                 Key: HIVE-4041
>                 URL: https://issues.apache.org/jira/browse/HIVE-4041
>             Project: Hive
>          Issue Type: Bug
>          Components: PTF-Windowing
>            Reporter: Harish Butani
>            Assignee: Harish Butani
>         Attachments: WindowingComponentization.pdf
>
>
> Currently we disallow queries if the partition specifications of all Wdw fns are not
the same. We can relax this by generating multiple PTFOps based on the unique partitionings
in a Query. For partitionings that only differ in sort, we can introduce a sort step in between
PTFOps, which can happen in the same Reduce task.

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