[jira] [Created] (HIVE-28489) Partitioning the input data of Grouping Set GroupBy operator

[Seonggon Namgung (Jira)]

Seonggon Namgung created HIVE-28489:
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             Summary: Partitioning the input data of Grouping Set GroupBy 
operator
                 Key: HIVE-28489
                 URL: https://issues.apache.org/jira/browse/HIVE-28489
             Project: Hive
          Issue Type: Improvement
            Reporter: Seonggon Namgung
            Assignee: Seonggon Namgung
         Attachments: 2.PartitionDataBeforeGroupingSet.pptx

GroupBy operator with grouping sets often emits too many rows, which becomes 
the bottleneck of query execution. To reduce the number output rows, this JIRA 
proposes partitioning the input data of such GroupBy operator.

Please check out the attached slides for detailed explanation.



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