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  1. MariaDB Server
  2. MDEV-31071

Refactor case folding data types in Unicode collations

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    Description

      This task is a continuation for MDEV-30695.
      The intent is to remove joined tables storing casefolding+weight data using these C data types:

      typedef struct unicase_info_char_st
      		 
      {
      		 
        uint32 toupper;
      		 
        uint32 tolower;
      		 
        uint32 sort;
      		 
      } MY_UNICASE_CHARACTER;
      		 
       
      		 
      struct unicase_info_st
      		 
      {
      		 
        my_wc_t maxchar;
      		 
        MY_UNICASE_CHARACTER **page;
      		 
      };

      and replace them to separate casefolding tables:

      typedef struct casefold_info_char_t
      		 
      {
      		 
        uint32 toupper;
      		 
        uint32 tolower;
      		 
      } MY_CASEFOLD_CHARACTER;
      		 
       
      		 
      struct casefold_info_st
      		 
      {
      		 
        my_wc_t maxchar;
      		 
        MY_CASEFOLD_CHARACTER **page;
      		 
      };

      and separate weight tables:

        const uint16 * const *simple_weight; /* For general_ci-alike collations */

      The intent for this refactoring is explained in MDEV-30695.

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          Bug - A problem which impairs or prevents the functions of the product. MDEV-30577 Case folding for uca1400 collations is not up to date

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

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              bar Alexander Barkov
              bar Alexander Barkov
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                Updated:
                Resolved:

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