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  1. MariaDB Server
  2. MDEV-16871

in_predicate_conversion_threshold cannot be set in my.cnf

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    Description

      Currently testing 10.3.6 but looking at code this is still true in current 10.3.

      Any setting of in_predicate_conversion_threshold in my.cnf is overridden in init_common_variables() with this line:

        global_system_variables.in_subquery_conversion_threshold= IN_SUBQUERY_CONVERSION_THRESHOLD;

      Removing this line appears to fix the problem. A default is set in sys_vars.cc anyway I don't think this is needed.

      This affects ColumnStore because we need to set this high.

      As a side note, I couldn't see this variable documented in KB.

      Attachments

        Issue Links

          includes

          Bug - A problem which impairs or prevents the functions of the product. MDEV-20083 Predicate into subqueries is server KILLER, which can not even be disabled

          • Major - Major loss of function.
          • Closed
          is caused by

          Bug - A problem which impairs or prevents the functions of the product. MDEV-20105 Case for bringing in_subquery_conversion_threshold back in next possible release

          • Critical - Crashes, loss of data, severe memory leak.
          • Closed
          relates to

          New Feature - A new feature of the product, which has yet to be developed. MCOL-1385 Merge MariaDB 10.3

          • Major - Major loss of function.
          • Closed

          Bug - A problem which impairs or prevents the functions of the product. MDEV-20482 MyISAM & Aria very slow when IN predicates containing more than 999 elements reference unindexed column.

          • Minor - Minor loss of function, or other problem where easy workaround is present.
          • Closed

          Activity

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            LinuxJedi Andrew Hutchings (Inactive) created issue -
            LinuxJedi Andrew Hutchings (Inactive) made changes -
            Field Original Value New Value
            elenst Elena Stepanova made changes -
            Component/s Variables [ 13903 ]
            Fix Version/s 10.3 [ 22126 ]
            Assignee Sergei Golubchik [ serg ]
            serg Sergei Golubchik made changes -
            Fix Version/s 10.4 [ 22408 ]
            pslawek83 Slawomir Pryczek made changes -
            serg Sergei Golubchik made changes -
            Priority Major [ 3 ] Critical [ 2 ]
            serg Sergei Golubchik made changes -
            Status Open [ 1 ] Confirmed [ 10101 ]
            serg Sergei Golubchik made changes -
            serg Sergei Golubchik made changes -
            Assignee Sergei Golubchik [ serg ] Igor Babaev [ igor ]
            Status Confirmed [ 10101 ] In Review [ 10002 ]
            serg Sergei Golubchik made changes -
            Assignee Igor Babaev [ igor ] Sergei Golubchik [ serg ]
            serg Sergei Golubchik made changes -
            Status In Review [ 10002 ] Stalled [ 10000 ]
            serg Sergei Golubchik made changes -
            Fix Version/s 10.3.18 [ 23719 ]
            Fix Version/s 10.4.8 [ 23721 ]
            Fix Version/s 10.3 [ 22126 ]
            Fix Version/s 10.4 [ 22408 ]
            Resolution Fixed [ 1 ]
            Status Stalled [ 10000 ] Closed [ 6 ]
            serg Sergei Golubchik made changes -
            serg Sergei Golubchik made changes -
            Workflow MariaDB v3 [ 88682 ] MariaDB v4 [ 154740 ]

            People

              serg Sergei Golubchik
              LinuxJedi Andrew Hutchings (Inactive)
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              Dates

                Created:
                Updated:
                Resolved:

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