PL/SQL Packages DBMS_LOCK

Lock Management services for your PL/SQL applications

Subprocedures:

ALLOCATE_UNIQUE Allocate a unique lock ID to a named lock. 

REQUEST Function
                Request a lock of a specific mode.
                            nl -> Null
                            ss -> Sub Shared
                            sx -> Sub eXclusive
                            s  -> Shared
                            ssx -> Shared Sub eXclusive
                            x  -> eXclusive
CONVERT Function
                Convert a lock from one mode to another. 

RELEASE Function
                Releases a lock. 

SLEEP           Put a procedure to sleep for a specific time.  

For full documentation of the packaged procedures above see the Oracle Manual:
"Oracle9i Supplied PL/SQL Packages and Types Reference"

or the book Oracle Built in Packages by Steven Feuerstein et al

See also DBMSLOCK.SQL package specification file.

Related Commands:

LOCK TABLE

Related Views:

 V$LOCK
 V$_LOCK
 V$LOCKED_OBJECT
 V$LOCKS_WITH_COLLISIONS
 V$LOCK_ACTIVITY
 V$LOCK_ELEMENT