Advanced Queuing - Oracle

LNOCI Applications
Queue Table Export-Import
For an OCI application to access an 8.1-style queue, the session user has to be
granted either the object privilege of the queue he intends to access or the ENQUEUE
ANY QUEUE or DEQUEUE ANY QUEUE system privileges. The EXECUTE right of
DBMS_AQ will not be checked against the session user’s rights if the queue he
intends to access is an Oracle9i or 8.1-compatible queue.
Security Required for Propagation
AQ propagates messages through database links. The propagation driver dequeues
from the source queue as owner of the source queue; hence, no explicit access rights
have to be granted on the source queue. At the destination, the login user in the
database link should either be granted ENQUEUE ANY QUEUE privilege or be granted
the rights to enqueue to the destination queue. However, if the login user in the
database link also owns the queue tables at the destination, no explicit AQ
privileges need to be granted.
Queue Table Export-Import
Exporting Queue Table Data
Table 4–2 Operations and Required Privileges
Operation(s) Privileges Required
ENQUEUE/ DEQUEUE to
another’s queues
ENQUEUE/ DEQUEUE to
any queues
Must be granted execute rights on DBMS_AQ and be granted
privileges by the owner using DBMS_AQADM.GRANT_QUEUE_
PRIVILEGE.
Must be granted execute rights on DBMS_AQ and be granted
ENQUEUE ANY QUEUE or DEQUEUE ANY QUEUE system
privileges by an AQ administrator using DBMS_
AQADM.GRANT_SYSTEM_PRIVILEGE.
When a queue table is exported, the queue table data and anonymous blocks of
PL/SQL code are written to the export dump file. When a queue table is imported,
the import utility executes these PL/SQL anonymous blocks to write the metadata
to the data dictionary.
The export of queues entails the export of the underlying queue tables and related
dictionary tables. Export of queues can only be done at queue-table granularity.
Managing AQ 4-5