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From "Rohini Palaniswamy (JIRA)" <j...@apache.org>
Subject [jira] [Created] (PIG-4657) [Pig on Tez] Optimize GroupBy and Distinct key comparison
Date Wed, 12 Aug 2015 23:56:45 GMT
Rohini Palaniswamy created PIG-4657:
---------------------------------------

             Summary: [Pig on Tez] Optimize GroupBy and Distinct key comparison
                 Key: PIG-4657
                 URL: https://issues.apache.org/jira/browse/PIG-4657
             Project: Pig
          Issue Type: Sub-task
            Reporter: Rohini Palaniswamy
            Assignee: Rohini Palaniswamy
             Fix For: 0.16.0


   While bytes comparator cannot be used for joins till TEZ-2715 is available, they can be
used for group by and distinct if they have only one Tez input. If there is more than one
input due to union optimization (OrderedGroupedMergedKVInput) , full comparator has to be
still used as OrderedGroupedMergedKVInput uses the comparator to merge the two underlying
inputs.



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