Ashutosh Chauhan created HIVE-20049:
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             Summary: hive.groupby.limit.extrastep should be false by default
                 Key: HIVE-20049
                 URL: https://issues.apache.org/jira/browse/HIVE-20049
             Project: Hive
          Issue Type: Task
          Components: Query Planning
            Reporter: Ashutosh Chauhan


In fact this flag is not needed since FetchTask can enforce limit there is 
never a reason to have another vertex purely for limit.



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