Synonyms for oracle queues

Question

hi,
We have the following set up in place,
A Schema user(say user1) who owns all tables, procedures, queues. And a user(say user2) who accesses these objects using synonyms.
User2 is able to create synonyms and has been granted enqueue/dequeue permissions for the queue owned by user1.
now user2 executes a plsql procedure invoking these queues, but this gives an error stating user2.queue-name not found.
if the same plsql procedure is modified to prefix user1.queue-name then the procedure runs successfully.
Are synonyms valid for oracle queues? any ideas to make things work?

Answer 1

Solution
The behaviour of AQ can be changed to use the standard PL/SQL definer/invoker's rights model when
executing the packages via an event setting. When the event is in place, the referenced queue user
will default to the actual owner of the queue. The event can be set statically via
event = "10862 trace name context forever, level 1"
in the init.ora or
alter system set event='10862 trace name context forever, level 1' scope=spfile;
for the spfile and restarting the instance. Alternatively the parameter can be set dynamically via
alter system set events '10862 trace name context forever, level 1';
or
alter session set events '10862 trace name context forever, level 1';
The workaround is  to explicitly specify the schema name when referencing the AQ objects, e.g.
dbms_aq.enqueue (queue_name => 'USER_A.QUEUE_A' ..