SQL> SQL> DECLARE 2 lv_test_bln BOOLEAN; 3 BEGIN 4 lv_test_bln := UPPER('true') LIKE 'TRE%'; 5 IF lv_test_bln THEN 6 DBMS_OUTPUT.PUT_LINE('Result: TRUE'); 7 ELSE 8 DBMS_OUTPUT.PUT_LINE('Result: FALSE'); 9 END IF; 10 END; 11 / Result: FALSE PL/SQL procedure successfully completed. SQL>