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  1. Hive
  2. HIVE-15655

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

    Details

    • Type: Bug
    • Status: Closed
    • Priority: Major
    • Resolution: Fixed
    • Affects Version/s: 2.2.0
    • Fix Version/s: 2.2.0
    • Component/s: Physical Optimizer
    • Labels:
      None
    • Release Note:
      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 V
        2. HIVE-15655.2.patch
          29 kB
          Gopal V
        3. HIVE-15655.2.patch
          29 kB
          Gopal V
        4. HIVE-15655.3.patch
          29 kB
          Gopal V

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              • Assignee:
                gopalv Gopal V
                Reporter:
                gopalv Gopal V
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                Dates

                • Created:
                  Updated:
                  Resolved: