Table Lock

Some useful tables when something somewhere has a table locked:

SELECT * FROM V$LOCK;

SELECT * FROM dba_blockers;

SELECT * FROM dba_locks;

SELECT * FROM dba_waiters;

SELECT * FROM V$SQLTEXT WHERE ADDRESS IN (SELECT SQL_ADDRESS FROM V$SESSION WHERE SID IN (SELECT HOLDING_SESSION FROM dba_blockers));

SELECT * FROM V$SESSION WHERE SID IN (SELECT HOLDING_SESSION FROM dba_blockers);

SELECT * FROM V$SQLTEXT WHERE SQL_ID = '21hy5qgd56a6g';

SELECT * FROM V$SESSION WHERE SID = 152;