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  1. MariaDB Server
  2. MDEV-17669

Add sql_mode specific tokens for the keyword DECLARE

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    Details

    • Type: Task
    • Status: Closed (View Workflow)
    • Priority: Major
    • Resolution: Fixed
    • Fix Version/s: 10.3.11
    • Component/s: Parser
    • Labels:
      None

      Description

      DECLARE has different meanings 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 DECLARE_SYM, we'll have separate DECLARE_MARIADB_SYM and DECLARE_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 DECLARE_MARIADB_SYM, and translate it to DECLARE_ORACLE_SYM in Oracle compatibility mode:

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

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              Assignee:
              bar Alexander Barkov
              Reporter:
              bar Alexander Barkov
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                Updated:
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