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  1. MariaDB Server
  2. MDEV-16871

in_predicate_conversion_threshold cannot be set in my.cnf

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      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.

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              serg Sergei Golubchik
              LinuxJedi Andrew Hutchings (Inactive)
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