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From "Harish Butani (JIRA)" <j...@apache.org>
Subject [jira] [Created] (HIVE-7063) Optimize for the Top N within a Group use case
Date Wed, 14 May 2014 21:55:24 GMT
Harish Butani created HIVE-7063:
-----------------------------------

             Summary: Optimize for the Top N within a Group use case
                 Key: HIVE-7063
                 URL: https://issues.apache.org/jira/browse/HIVE-7063
             Project: Hive
          Issue Type: Bug
            Reporter: Harish Butani
            Assignee: Harish Butani


It is common to rank within a Group/Partition and then only return the Top N entries within
each Group.
With Streaming mode for Windowing, we should push the post filter on the rank into the Windowing
processing as a Limit expression.



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