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  1. MariaDB Server
  2. MDEV-20743

Revise patches that fixed calculation and usage of condition selectivity

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Details

    • Bug
    • Status: Stalled (View Workflow)
    • Major
    • Resolution: Unresolved
    • 10.1(EOL), 10.2(EOL), 10.3(EOL), 10.4(EOL), 10.5
    • 10.5
    • Optimizer
    • None

    Description

      The patches that fixed the bugs in the code of calculate_cond_selectivity_for_table() and
      table_cond_selectivity() effectively changed the original ideas how selectivity of condition should be calculated and how it should be used. As result many inconsistencies in the code has appeared and they induce new and bugs in cardinality estimations.

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          Bug - A problem which impairs or prevents the functions of the product. MDEV-21633 Assertion `tmp >= 0' failed in best_access_path with rowid_filter=ON

          • Major - Major loss of function.
          • Stalled

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              igor Igor Babaev
              igor Igor Babaev
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              Dates

                Created:
                Updated:

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