AQ $_MESSAGES_EXCEPTIONFirst of all I know there’s this question: How to clear a queue in Oracle AQ but it doesn’t have an answer. I have a lot of messages(500k) in the exception queue in the Oracle AQ (I didn’t know expired messages are moved to another queue so I didn’t create a consumer for those).
All AQ Queues have a default associated exception queue where messages that may not be consumed within given constraints are moved.By default the exception queue name is called AQ $_[ORIGINAL_ QUEUE _NAME]_E.For example, if the original normal queue is called MYQUEUE, its default exception queue is called AQ $_MYQUEUE_E.I notice that for example, in SQL Developer, I can’t see the exception queue …
3/24/2011 · Enabling AQ Exception Queue Had to spend a little while searching for this one so added here for quick reference By default exception queues are disabled for enqueue and dequeue so to enable them you need to use the start_ queue function however Oracle prevents enquing to these queues so you will need to explicitly state that enqueue is disabled …
12/2/2009 · This discussion is archived. 2 Replies, If the multiconsumer exception queue was created in a queue table with the compatible parameter set to 8.0, then expired messages can be dequeued only by specifying a message identifier. Queues created in a queue table with compatible set to 8.0 (referrred to in this guide as 8.0-style queues) are deprecated in Oracle Streams AQ 10 g Release 2 (10.2). Oracle recommends that any new queues you create be.
Oracle Advanced Queuing by Example, DBMS_AQADM – Oracle, aq$_ queue_table_name _e, a default exception queue associated with the queue table. aq$ queue_table_name, a read-only view, which is used by Oracle Streams AQ applications for querying queue data. aq$_ queue_table_name _t, an index (or an index organized table (IOT) in the case of multiple consumer queues) for the queue monitor operations, Oracle9i Application Developer’s Guide – Advanced Queuing Release 2 (9.2) Part Number A96587-01, You said ‘ Queuing ‘ (I understand ‘ Oracle Advanced Queuing ‘) is used to implement an application which exists across multiple databases that are ‘loosely coupled’. A colleague of mine says that AQ is for handling messages and workflow prerequisites among different processes, applications, etc….
Exception Queues An exception queue is a repository for expired or unserviceable messages. Applications cannot directly enqueue into exception queues . Also, a multiconsumer exception queue cannot have subscribers associated with it. However, an application that intends to handle these expired or unserviceable messages can dequeue them exactly …
Never use DDL or DML against tables created by dbms_aqadm.create_ queue _table.Only use dbms_aqadm and dbms_ aq to work with these tables. Oracle may make several supporting tables, indexes, etc that you will not be aware of.
