Ограничение доступа по утилитам : Oracle

CREATE OR REPLACE TRIGGER BLOCK_TOOLS_FROM_PROD
AFTER LOGON ON DATABASE
DECLARE
  V_PROG VARCHAR2 (256);
  V_USER VARCHAR2 (64);
BEGIN
  SELECT sys_context('userenv','module'),
         sys_context('userenv','session_user')
  INTO V_PROG, V_USER
  FROM dual;
IF V_USER IN ('SUPERMAG') THEN
  IF UPPER(V_PROG) LIKE '%TOAD%' OR -- TOAD
     UPPER(V_PROG) LIKE '%T.O.A.D%' OR -- TOAD
     UPPER(V_PROG) LIKE '%SQLNAV%' OR -- SQL NAVIGATOR
     UPPER(V_PROG) LIKE '%PLSQLDEV%' OR -- PLSQL DEVELOPER
     UPPER(V_PROG) LIKE '%BUSOBJ%' OR -- BUSINESS OBJECTS
     UPPER(V_PROG) LIKE '%EXCEL%' OR -- MS-EXCEL PLUG-IN
     UPPER(V_PROG) LIKE '%ACC%' -- Access
  THEN
     RAISE_APPLICATION_ERROR(-20000, 'Ошибка приложения!');
  END IF;
END IF;
END;