Dequeue condition causes queue sort order to be ignored

This question relates to the fact that when a dequeue condition is specified the sort order of the queue can be invoked on:
Of the 11.2 document "Introduction to Oracle QA:

"A dequeue condition is expressed in terms of message properties or the content of the message and is similar to the syntax for the WHERE clause of a SQL query." Messages in the queue are assessed based on the State and the messages that meet the given condition are returned. When using a dequeue, removed from the order of messages condition is indeterminate, and the sort order of the queue is not honored. »


I have a problem - I'm interested in consumers of respondent data certain selection criteria, but want to get this qualification given in the order of the oldest first (ENQ_TIME). If specifying the dequeue condition means that the order is unpredictable so it is not acceptable.

I recognize that I could solve the problem by using the queue MULTIPLE_CONSUMER in which subscriptions are added with the rules for each possible consumer. The problem is that the volatility of the pool of consumption is relatively high and a solution is sought requires no adjustment properties of the queue.

Am I missing something? i.e. misinterpretting this restriction?
Someone else took up this challenge and found a technique to solve this problem?

Thank you in advance.

Hello

The note needs modified to indicate that the event changes how dequeue via a deq_condition or done by the works of correlation id by adding another order by clause. If the 'impact' performance is localized to these stops and nothing else.

There are a number of customers who have implemented this in production environments and are perfectly happy with it. Have you tried this event in a test environment?

Thank you
Peter

Tags: Database

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