PERFORMANCE: not creating bags for ORDER BY
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                 Key: PIG-802
                 URL: https://issues.apache.org/jira/browse/PIG-802
             Project: Pig
          Issue Type: Improvement
            Reporter: Olga Natkovich


Order by should be changed to not use POPackage to put all of the tuples in a 
bag on the reduce side, as the bag is just immediately flattened. It can 
instead work like join does for the last input in the join. 


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