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  1. Hive
  2. HIVE-16260

Remove parallel edges of semijoin with map joins.

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Details

    • Task
    • Status: Resolved
    • Major
    • Resolution: Fixed
    • None
    • 2.3.0
    • None

    Description

      Remove parallel edges of semijoin with map joins as they don't give any benefit to the query.
      Also, ensure that bloom filters are created to handle at least 1M entries and the semijoin is disabled if the big table has less than 1M rows.
      Both these features are configurable.

      Attachments

        1. HIVE-16260.1.patch
          46 kB
          Deepak Jaiswal
        2. HIVE-16260.2.patch
          152 kB
          Deepak Jaiswal
        3. HIVE-16260.3.patch
          118 kB
          Deepak Jaiswal
        4. HIVE-16260.4.patch
          105 kB
          Deepak Jaiswal
        5. HIVE-16260.5.patch
          119 kB
          Deepak Jaiswal

        Issue Links

          is related to

          Bug - A problem which impairs or prevents the functions of the product. HIVE-16553 Change default value for hive.tez.bigtable.minsize.semijoin.reduction

          • Major - Major loss of function.
          • Closed

          Activity

            People

              djaiswal Deepak Jaiswal
              djaiswal Deepak Jaiswal
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              Dates

                Created:
                Updated:
                Resolved: