CREATE TABLE test_lock AS SELECT * FROM tab;
 
SELECT * FROM test_lock;
 
UPDATE test_lock SET tname = 'SCENARIO_TAB1' WHERE tname = 'SCENARIO_TAB';
 
SELECT * FROM v$lock WHERE sid=userenv('sid');
 
ADDR	KADDR	SID	TYPE	ID1	ID2	LMODE	REQUEST	CTIME	BLOCK
1F9C4224	1F9C423C	147	TM	53946	0	3	0	3	0
1FA3BAF8	1FA3BC14	147	TX	1310756	12	6	0	3	0
 
-- LMODE 가 Lock Mode를 의미한다. SX(3), X(6)
 
commit;
 
SELECT * FROM v$lock WHERE sid=userenv('sid');