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  1. Hive
  2. HIVE-5775 Introduce Cost Based Optimizer to Hive
  3. HIVE-7662

CBO: changes to Cost Model

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Details

    • Sub-task
    • Status: Resolved
    • Major
    • Resolution: Fixed
    • None
    • None
    • None
    • None

    Description

      • Model Join cost as Sum of Input sizes
      • Fix bug with NDV calculations. For now use Optiq's default formulas.
      • Model Cummulative cost to favor broad Plans over Deep Plans.

      Attachments

        1. HIVE-7662.1.patch
          8 kB
          Harish Butani

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            rhbutani Harish Butani
            rhbutani Harish Butani
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            Dates

              Created:
              Updated:
              Resolved: