ALTER PROCEDUREproc_name[characteristic...]characteristic: { CONTAINS SQL | NO SQL | READS SQL DATA | MODIFIES SQL DATA } | SQL SECURITY { DEFINER | INVOKER } | COMMENT 'string'
      This statement can be used to change the characteristics of a
      stored procedure. More than one change may be specified in an
      ALTER PROCEDURE statement. However,
      you cannot change the parameters or body of a stored procedure
      using this statement; to make such changes, you must drop and
      re-create the procedure using DROP
      PROCEDURE and CREATE
      PROCEDURE.
    
      You must have the ALTER ROUTINE
      privilege for the procedure. (That privilege is granted
      automatically to the procedure creator.)
    


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