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  1. MariaDB ColumnStore
  2. MCOL-5191

Join Optimizer: histogram statistics/ needed for cost-based optimization

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    • 2021-17, 2022-22

    Description

      The previous step delivers a statistics that allows to detect uniqueness of a column to be able to cut lops in a JOIN graph the most effective way.
      The current step will deliver a histogram collected for columns of tables. The strained goal is to collect a Number of Dictinct Values statistics also.
      In the scope of this project the mentioned statistics collection is a manual operation and run by ANALYZE TABLE command as previously.

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              denis0x0D Denis Khalikov
              drrtuy Roman
              Roman Roman
              Daniel Lee Daniel Lee (Inactive)
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