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  1. Hive
  2. HIVE-15655

Optimizer: Allow config option to disable n-way JOIN merging

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Details

    • Bug
    • Status: Closed
    • Major
    • Resolution: Fixed
    • 2.2.0
    • 2.2.0
    • Physical Optimizer
    • None
    • Optimizer: Allow config option to disable n-way JOIN merging (Gopal V, reviewed by Jesus Camacho Rodriguez)

    Description

      N-way Joins in Tez produce bad runtime plans whenever they are left-outer joins with map-joins.

      This is something which should have a safety setting.

      Attachments

        1. HIVE-15655.1.patch
          19 kB
          Gopal Vijayaraghavan
        2. HIVE-15655.2.patch
          29 kB
          Gopal Vijayaraghavan
        3. HIVE-15655.2.patch
          29 kB
          Gopal Vijayaraghavan
        4. HIVE-15655.3.patch
          29 kB
          Gopal Vijayaraghavan

        Issue Links

          relates to

          Bug - A problem which impairs or prevents the functions of the product. HIVE-9038 Join tests fail on Tez

          • Major - Major loss of function.
          • Closed

          Activity

            People

              gopalv Gopal Vijayaraghavan
              gopalv Gopal Vijayaraghavan
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              Dates

                Created:
                Updated:
                Resolved: