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  1. Hive
  2. HIVE-13518

Hive on Tez: Shuffle joins do not choose the right 'big' table.

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Details

    • Bug
    • Status: Closed
    • Major
    • Resolution: Fixed
    • None
    • 2.1.0
    • Physical Optimizer, Tez
    • None

    Description

      Currently the big table is always assumed to be at position 0 but this isn't efficient for some queries as the big table at position 1 could have a lot more keys/skew. We already have a mechanism of choosing the big table that can be leveraged to make the right choice.

      Attachments

        1. HIVE-13518.3.patch
          11 kB
          Vikram Dixit K
        2. HIVE-13518.2.patch
          12 kB
          Vikram Dixit K
        3. HIVE-13518.1.patch
          8 kB
          Vikram Dixit K

        Activity

          People

            vikram.dixit Vikram Dixit K
            vikram.dixit Vikram Dixit K
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            Dates

              Created:
              Updated:
              Resolved: