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Oracle 10g Advance Queue Enhancements

Advanced Queuing has been integrated into Oracle Streams, and is now called Oracle Streams Advanced Queuing (AQ). Oracle Streams AQ supports all existing AQ functionality and more. The following summarizes the new features and enhancements added to the dbms_aq package.

  • A new package called dbms_aqadm is introduced.
     

  • New AQ Type    message_properties_t_array type
     

  • message_properties_t type has an additional attribute, transaction_group.
     

  • New JMS Types and added functionality to existing types

With the help of the enqueue_array procedure, you can enqueue an array of payloads, using a corresponding array of message properties. And you can use the dequeue_array function to dequeue an array of payloads and a corresponding array of message properties.

Let us look at an example of enqueue and deque.

DECLARE
enq_cnt PLS_INTEGER;
enq_opt DBMS_AQ.enqueue_options_t;
mesg_props DBMS_AQ.message_properties_array_t;
parray OE.addr_nest_tab_typ;
msgidarr DBMS_AQ.msgid_array_t;

BEGIN

-- Add code here to populate the array --
--
enq_cnt := DBMS_AQ.ENQUEUE_ARRAY
(queue_name      => 'IX.ORDERS_QUEUE',
enqueue_options => enq_opt,
array_size      => 20,
message_properties_array => mesg_props,
payload_array   => parray,
msgid_array     => msgidarr);
END;
/

In the example above, the message payloads are taken from the specified structure, such as the nested table oe.addr_nest_tab_typ. The function returns the number of messages successfully enqueued.


Get the complete story:

The above text is an excerpt from "Oracle Database 10g New Features: Reference for Advanced Tuning and Administration", by Rampant TechPress.  Written by top Oracle experts, this book has a complete online code deport with ready to use scripts. 

To get the code instantly, click here:

http://rampant-books.com/book_2003_2_oracle10g.htm


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