DBA_LOCK

DBA_LOCK lists all locks or latches held in the database, and all outstanding requests for a lock or latch.

Column Datatype NULL Description

SESSION_ID

NUMBER

  

Session holding or acquiring the lock

LOCK_TYPE

VARCHAR2(26)

  

Lock type

See Also: For a listing of lock types, see Oracle Enqueue Names

MODE HELD

VARCHAR2(40)

  

Lock mode

MODE REQUESTED

VARCHAR2(40)

  

Lock mode requested

LOCK_ID1

VARCHAR2(40)

  

Type-specific lock identifier, part 1

LOCK_ID2

VARCHAR2(40)

  

Type-specific lock identifier, part 2

LAST_CONVERT

NUMBER

  

The last convert

BLOCKING_OTHERS

VARCHAR2(40)

  

Whether the lock is currently blocking others

CON_ID

NUMBER

  

The ID of the container to which the data pertains. Possible values include:

  • 0: This value is used for rows containing data that pertain to the entire CDB. This value is also used for rows in non-CDBs.

  • 1: This value is used for rows containing data that pertain to only the root

  • n: Where n is the applicable container ID for the rows containing data