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Way to identify which row is being locked
In Oracle 9i, is there a way to identify the specific row being locked in a particular table? I have seen much code that identifies the object being locked and by whom, but I need to be able to identify the row.
In Oracle 9i, is there a way to identify the specific row being locked in a particular table? I have seen much code that identifies the object being locked and by whom, but I need to be able to identify the row.
Oracle has several views for showing lock status:
- DBA_BLOCKERS -- Shows non-waiting sessions holding locks being waited on
- DBA_DDL_LOCKS -- Shows all DDL locks held or being requested
- DBA_DML_LOCKS -- Shows all DML locks held or being requested
- DBA_LOCK_INTERNAL -- Displays one row for every lock or latch held or being requested
- DBA_LOCKS -- Shows all locks or latches held or being requested
- DBA_WAITERS -- Shows all sessions waiting on, but not holding waited for locks
The DBA_LOCK_INTERNAL view is best to show locks for a specific user, and you can specify the query in the form:
SELECT NVL(b.username,'SYS') username, session_id,lock_type,mode_held, mode_requested,lock_id1,lock_id2 FROM sys.dba_lock_internal a, sys.v_$session b where . . .For a complete list of over 600 Oracle scripts, I would recommend the Ault Oracle script location at www.oracle-script.com.
