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  1. MariaDB Server
  2. MDEV-28366

GLOBAL debug_dbug setting affected by collation_connection=utf16…

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    Description

      SET collation_connection=utf16le_general_ci;
      		 
      SET GLOBAL debug_dbug='d,any_random_string';

      Will add about 8000-11000 lines of debug information to the error log. However,

      SET GLOBAL debug_dbug='d,any_random_string';

      Does not. Happens on all 10.2-10.9 debug versions. Tested via CLI only.

      Discussed with bar and marko.

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          bar Alexander Barkov added a comment -

          The problem happens because Sys_var_dbug::do_check() does not convert the value to utf8.
          The problem is also repeatable with this script:

          SET collation_connection=utf16le_general_ci;
          		 
          SET  debug_dbug='d,any_random_string';
          		 
          SELECT @@debug_dbug;


          +--------------+
          		 
          | @@debug_dbug |
          		 
          +--------------+
          		 
          | d            |
          		 
          +--------------+

          This method should fix fixed to convert the value, like Sys_var_charptr_base::do_check_string() does.

          bar Alexander Barkov added a comment - The problem happens because Sys_var_dbug::do_check() does not convert the value to utf8. The problem is also repeatable with this script: SET collation_connection=utf16le_general_ci; SET debug_dbug= 'd,any_random_string' ; SELECT @@debug_dbug; +--------------+ | @@debug_dbug | +--------------+ | d | +--------------+ This method should fix fixed to convert the value, like Sys_var_charptr_base::do_check_string() does.

          People

            bar Alexander Barkov
            Roel Roel Van de Paar
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            Dates

              Created:
              Updated:
              Resolved:

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