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  1. MariaDB Server
  2. MDEV-8952

Optimizer chooses wrong index for ORDER BY

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Details

    • Bug
    • Status: Stalled (View Workflow)
    • Major
    • Resolution: Unresolved
    • 5.5, 10.0, 10.1
    • 10.4
    • Optimizer
    • None
    • 10.1.9-1, 10.1.9-2, 10.1.9-3

    Description

      It thinks that composite index is not good for ordering (WHY???) and so chooses primary one (removing ORDER BY leads to correct index chosen forcing correct index leads to filesort).

      Related to https://bugs.launchpad.net/percona-server/+bug/1501457

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            psergei Sergei Petrunia
            sanja Oleksandr Byelkin
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            Dates

              Created:
              Updated:

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