Uploaded image for project: 'Hive'
  1. Hive
  2. HIVE-28489

Partitioning the input data of Grouping Set GroupBy operator

Log workAgile BoardRank to TopRank to BottomBulk Copy AttachmentsBulk Move AttachmentsAdd voteVotersWatch issueWatchersCreate sub-taskConvert to sub-taskMoveLinkCloneLabelsUpdate Comment AuthorReplace String in CommentUpdate Comment VisibilityDelete Comments
    XMLWordPrintableJSON

Details

    Description

      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.

      Attachments

        1. 2.PartitionDataBeforeGroupingSet.pdf
          505 kB
          Seonggon Namgung

        Activity
          This comment will be Viewable by All Users Viewable by All Users
          Cancel

          People

            seonggon Seonggon Namgung Assign to me
            seonggon Seonggon Namgung
            Votes:
            0 Vote for this issue
            Watchers:
            3 Start watching this issue

            Dates

              Created:
              Updated:

              Slack

                Issue deployment