[jira] [Created] (HIVE-21542) Group by rollup returns with empty result when the grouped dataset is empty

[Ivan Suller (JIRA)]

Ivan Suller created HIVE-21542:
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             Summary: Group by rollup returns with empty result when the 
grouped dataset is empty
                 Key: HIVE-21542
                 URL: https://issues.apache.org/jira/browse/HIVE-21542
             Project: Hive
          Issue Type: Bug
          Components: HiveServer2
            Reporter: Ivan Suller
            Assignee: Ivan Suller
         Attachments: groupby_rollup_empty2.q

Running the attached q file the result is not what is expected: the rollup 
group by missing the one summary row. The summary row should be there even if 
the source dataset is empty.



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