We are using Oracle's queueing facilities. Part of the setup involves granting another schema rights to dequeue from the schema that owns the queue. This is done through the dbms_aqadm.grant_queue_privilege routine. When that is successful, one can see the privilege in dba_tab_privs.
If you attempt to view the same privileges through the View context menu option for the schema, then click the Object privileges tab, you will see the queue name in the object column, but there are no vertical columns to accommodate AQ privs like ENQUEUE and DEQUEUE.
