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  1. MariaDB Server
  2. MDEV-31327

Histogram range selectivity estimates should be merged, not added.

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Details

    • Bug
    • Status: Stalled (View Workflow)
    • Major
    • Resolution: Unresolved
    • 11.1.0, 10.11.3, 11.0.1, 10.4.29, 10.5.20, 10.6.13, 10.9.6, 10.10(EOL)
    • 10.4(EOL)
    • Optimizer
    • None

    Description

      When the optimizer is evaluating join order and estimating rows produced by a join order, it loops through column constraints adding rather than merging selectivity estimates.

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        Issue Links

          relates to

          Bug - A problem which impairs or prevents the functions of the product. MDEV-31067 selectivity_from_histogram >1.0 for col=const on DOUBLE_PREC_HB histogram

          • Blocker - Blocks development and/or testing work, production could not run.
          • Closed

          New Feature - A new feature of the product, which has yet to be developed. MDEV-22360 Sufficient conditions for accurate calculation of join cardinality

          • Major - Major loss of function.
          • Stalled

          Activity

            People

              Johnston Rex Johnston
              Johnston Rex Johnston
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              Dates

                Created:
                Updated:

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