Krisztian Kasa created HIVE-23736:

             Summary: Disable topn in ReduceSinkOp if a TNK is introduced
                 Key: HIVE-23736
             Project: Hive
          Issue Type: Improvement
          Components: Physical Optimizer
            Reporter: Krisztian Kasa
            Assignee: Krisztian Kasa

Both the Reduce Sink and TopNKey operator has Top n key filtering 
functionality. If TNK is introduced this functionality is done twice.

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