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  1. Hive
  2. HIVE-20842

Fix logic introduced in HIVE-20660 to estimate statistics for group by

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Details

    • Bug
    • Status: Closed
    • Major
    • Resolution: Fixed
    • 4.0.0
    • 4.0.0-alpha-1
    • Statistics
    • None

    Description

      HIVE-20660 introduced better estimation for group by operator. But the logic did not account for Partial and Full group by separately.
      For partial group by parallelism (i.e. number of tasks) should be taken into account.

      Attachments

        1. HIVE-20842.1.patch
          2 kB
          Vineet Garg
        2. HIVE-20842.2.patch
          2 kB
          Vineet Garg
        3. HIVE-20842.3.patch
          708 kB
          Vineet Garg
        4. HIVE-20842.4.patch
          710 kB
          Vineet Garg
        5. HIVE-20842.5.patch
          747 kB
          Vineet Garg
        6. HIVE-20842.6.patch
          746 kB
          Vineet Garg
        7. HIVE-20842.7.patch
          734 kB
          Vineet Garg
        8. HIVE-20842.8.patch
          608 kB
          Vineet Garg
        9. HIVE-20842.9.patch
          556 kB
          Vineet Garg
        10. HIVE-20842.10.patch
          42 kB
          Vineet Garg
        11. HIVE-20842.11.patch
          28 kB
          Vineet Garg
        12. HIVE-20842.12.patch
          28 kB
          Vineet Garg

        Issue Links

          is caused by

          Improvement - An improvement or enhancement to an existing feature or task. HIVE-20660 Group by statistics estimation could be improved by bounding the total number of rows to source table

          • Major - Major loss of function.
          • Closed
          links to

          Web Link ReivewBoard

          Activity

            People

              vgarg Vineet Garg
              vgarg Vineet Garg
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              Dates

                Created:
                Updated:
                Resolved: