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  1. MariaDB Server
  2. MDEV-26749

Optimizer_switch split_materialized Returns Wrong Results

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Details

    • Bug
    • Status: Closed (View Workflow)
    • Major
    • Resolution: Duplicate
    • 10.5.11, 10.5.12, 10.3(EOL), 10.4(EOL), 10.5, 10.6, 10.7(EOL)
    • N/A
    • Optimizer
    • None
    • Centos7

    Description

      There is a bug with split_materialized.
      When optimizer_switch='split_materialized=on'; the attached query returns very wrong results. After disabling the split_materialized, it returns the correct results.

      This bug starts in 10.5.10, which is the version that includes the fixes from 10.4.19. 10.4.19 includes MDEV-25128 fix which could be a blame option. The bug does not happen in 10.5.9.

      I've attached the .sql to reproduce the bug.

      Attachments

        1. generatebug.sql
          5 kB
          Kathryn Sizemore
        2. mariadb_optimizer_bug_replication.sql
          11 kB
          Johny Hatcher

        Issue Links

          duplicates

          Bug - A problem which impairs or prevents the functions of the product. MDEV-27132 Wrong result from query when using split optimization

          • Major - Major loss of function.
          • Closed

          Bug - A problem which impairs or prevents the functions of the product. MDEV-27510 Query returns wrong result when using split optimization

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

          Activity

            People

              igor Igor Babaev
              ksizemore Kathryn Sizemore
              Votes:
              7 Vote for this issue
              Watchers:
              12 Start watching this issue

              Dates

                Created:
                Updated:
                Resolved:

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