RE: Advanced queuing : dequeing from remote database

From: John Dunn <jdunn_at_sefas.com>
Date: Thu, 17 Feb 2005 16:53:07 -0000
Message-ID: <001101c51511$28bd0230$3e04050a@johnman>

I have overcome the connection description for remote database not found error but now get the following error : Looks like a privilage thing, but I do not understand this. Since I am able to run dbms_aqadm commands under my user on both databases surely the privileges are OK?

SQL> select qname,failures,last_error_msg from dba_queue_schedules;

QNAME                            FAILURES


------------------------------ ----------

LAST_ERROR_MSG

---

---

NEW_JOB_MESSAGE_QUEUE                   5
ORA-06550: line 1, column 7:

PLS-00201: identifier 'DBMS_AQADM' must be declared ORA-06550: line 1, column 7:
PL/SQL: Statement ignored

 -----Original Message-----

From: 	John Dunn [mailto:jdunn_at_sefas.com]
Sent:	17 February 2005 13:33
To:	'Oracle-L_at_freelists.org'
Cc:	'rjamya_at_gmail.com'; 'ntilbury_at_vartec.co.uk'
Subject:	RE: Advanced queuing : dequeing from remote database

I have identified the error as :

connection description for remote database not found

The address being used in add_subscriber is OPD4678.NEW_JOB_MESSAGE_QUEUE_at_VAN9 where VAN9 is my database link

but the entry on the queue seems to trying to use

OPD4678.NEW_JOB_MESSAGE_QUEUE_at_VAN9.US.ORACLE.COM Is this the problem?

Why is it trying to use VAN9.US.ORACLE.COM ???

The entry in tnsnames.ora is simply named VAN9.

From: 	John Dunn [mailto:jdunn_at_sefas.com]
Sent:	17 February 2005 10:46
To:	'Oracle-L_at_freelists.org'
Subject:	Advanced queuing : dequeing from remote database

I am experimenting with advanced queueing in Oracle 9i and am able to enqueue and dequeue messages within the same database.

However I would like to dequeue messages on a remote database via a database link.

I am confused as to what I need to set up on the remote server in order to dequeue the message.

I have set up the database link that points back to the enqueueing database, The database link works OK.

I am then trying to dequeue the message on the remote database using the following code(which is the same I use when doing this all on the same database except for the references to the database link). I get the error :

    message              opd4678.new_job_message_at_DEMO;
                                 *

ERROR at line 6:
ORA-06550: line 6, column 34:
PLS-00331: illegal reference to OPD4678.NEW_JOB_MESSAGE_at_DEMO

Any ideas what I have done wrong?

John

---

---

    set serveroutput on

declare

    dequeue_options      dbms_aq.dequeue_options_t;
    message_properties   dbms_aq.message_properties_t;
    message_handle       RAW(16);
    message              opd4678.new_job_message_at_DEMO;
    --message              opd4678.new_job_message;

BEGIN

    dequeue_options.CONSUMER_NAME           := NULL;
    dequeue_options.DEQUEUE_MODE            := DBMS_AQ.REMOVE;
    dequeue_options.NAVIGATION              := DBMS_AQ.NEXT_MESSAGE;
    dequeue_options.VISIBILITY              := DBMS_AQ.IMMEDIATE;
    dequeue_options.WAIT                    := DBMS_AQ.FOREVER;
    dequeue_options.MSGID                   := null;
    dequeue_options.CORRELATION             := 'TEST MESSAGE';

    DBMS_AQ.DEQUEUE (
       queue_name         => 'opd4678.new_job_message_queue_at_DEMO',
       dequeue_options    => dequeue_options,
       message_properties => message_properties,
       payload            => message,
       msgid              => message_handle

    );

    dbms_output.put_line('+-----------------+');
    dbms_output.put_line('| New Job |');
    dbms_output.put_line('+-----------------+');
    dbms_output.put_line('- Message ID   := ' || message.message_id);
    dbms_output.put_line('- Filename       := ' || message.host_file_name);

    COMMIT;

• -------------------------------------------------------

END;
/

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Received on Thu Feb 17 2005 - 11:55:44 CST