Advanced Queuing - Oracle

Creating a Queue Table
A read-only view which is used by AQ applications for querying queue
data called aq$.
An index for the queue monitor operations called aq$__t.
An index or an index organized table (IOT) in the case of multiple
consumer queues for dequeue operations called aq$__i.
For 8.1-compatible multiconsumer queue tables, the following additional
objects are created:
A table called aq$__s. This table stores
information about the subscribers.
A table called aq$__r. This table stores
information about rules on subscriptions.
An index organized table (IOT) called aq$__
h.This table stores the dequeue history data.
CLOB, BLOB, or BFILE objects are valid in an AQ message. You can propagate
these object types using AQ propagation with Oracle since release 8.1.x. To
enqueue an object type that has an LOB, you must first set the LOB_attribute
to EMPTY_BLOB() and perform the enqueue. You can then select the LOB locator
that was generated from the queue table’s view and use the standard LOB
operations. See the Oracle9i Application Developer’s Guide - Large Objects (LOBs)
for more information.
You can specify and modify the primary_instance and secondary_instance only
in 8.1 compatible mode.
You cannot specify a secondary instance unless there is a primary instance.
When a queue, queue table, or subscriber is created, modified, or dropped, and
if GLOBAL_TOPIC_ENABLED = TRUE, a corresponding LDAP entry is also
created.
Syntax
See Chapter 3, "AQ Programmatic Environments" for a list of available functions in
each programmatic environment. Use the following syntax references for each
programmatic environment:
PL/SQL (DBMS_AQADM Package): Oracle9i Supplied PL/SQL Packages and
Types Reference, DBMS_AQADM.CREATE_QUEUE_TABLE
9-6 Oracle9i Application Developer’s Guide - Advanced Queuing