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  1. MariaDB Server
  2. MDEV-17661

Add sql_mode specific tokens for the keyword DECODE

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Details

    • Task
    • Status: Closed (View Workflow)
    • Major
    • Resolution: Fixed
    • 10.3.11
    • Parser
    • None

    Description

      DECODE has different meaning in the default sql_mode and in sql_mode=ORACLE.

      To unify sql_yacc.yy and sql_yacc_ora.yy easier, we'll add sql_mode specific tokens for this keyword and modify the grammar in sql_yacc.yy and sql_yacc_ora.yy accordingly.

      Instead of DECODE_SYM, we'll have separate DECODE_MARIADB_SYM and DECODE_ORACLE_SYM.

      This will make possible for native and Oracle grammar rules to co-exists in the same *.yy files.

      By default, Lex_input_stream::find_keyword() will return DECODE_MARIADB_SYM, and translate it to DECODE_ORACLE_SYM in Oracle compatibility mode:

          if (m_thd->variables.sql_mode & MODE_ORACLE)
      		 
          {
      		 
            switch (symbol->tok) {
      		 
              ...
      		 
              case DECODE_MARIADB_SYM:         return DECODE_ORACLE_SYM;
      		 
              ...
      		 
            }
      		 
          }

      Attachments

        Issue Links

          blocks

          Task - A task that needs to be done. MDEV-12518 Unify sql_yacc.yy and sql_yacc_ora.yy

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

          Task - A task that needs to be done. MDEV-17652 Add sql_mode specific tokens for some keywords

          • Major - Major loss of function.
          • Closed

          Bug - A problem which impairs or prevents the functions of the product. MDEV-17660 sql_mode=ORACLE: Some keywords do not work as label names: history, system, versioning, without

          • Major - Major loss of function.
          • Closed

          Task - A task that needs to be done. MDEV-17664 Add sql_mode specific tokens for ':' and '%'

          • Major - Major loss of function.
          • Closed

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            People

              bar Alexander Barkov
              bar Alexander Barkov
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              Dates

                Created:
                Updated:
                Resolved:

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