begin	
  FORMS_DDL('alter session set optimizer_mode=rule');   
  FORMS_DDL('commit');

  IF NOT FORM_SUCCESS THEN
      SHOW_MESSAGE('The Rule optimizer invoking Failed...'); 	
      RAISE FORM_TRIGGER_FAILURE;
      exit_form(NO_VALIDATE);
  ELSE		            	
      SHOW_MESSAGE('The Rule optimizer has been invoked...');
      exit_form(NO_VALIDATE);
  END IF;                              
end;