AQ Locking Using Correlation ID

I need to pull multiple messages from a queue, grouped around a certain non static key.
I am using a correlation id to achieve this and it all seems to work fine except that the messages retirved via the corrid are not locked exlusively to the calling application whilst being dequeued.
As I have multiple applications all polling the queue it is possible for two applications to request the same "set" of messages at the same time, i.e. have the same corrid. However it appears that AQ does not do an equivalent to "select for update" when getting items via a correlation id.
I am using a dequeue_mode := dbms_aq.LOCKED, which I would expect to lock all messages that matched a particular corrid.
Is this not the case?
I can do a select for update no wait on the messages first and handle the -54, but wanted AQ to handle this itself, is there a way to do this or should I work around. Would obtaining a row lock on an AQ table cause any problems?
cheers

LOL @ getting shot down by the Mod in trying to figure out your error. Sorry. I don't mean to be rude it's just i'm in the same boat, but no way of figuring out why my template would save. Hours of work wasted.

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Top n Analysis using correlated subquery

Please explain this query. It is doing top n analysis using correlated subquery. I need explaination of execution of this query.
Select distinct a.sal
From emp a
where 1=(select count ( distinct b.sal) from emp b
     where a.sal <=b.sal)
Thanks in advance

Try breaking the query down and rewriting it in order to follow the logic;
SQL> --
SQL> -- Start by getting each salary from emp along with a count of all salaries in emp
SQL> --
SQL> select   a.sal,
        (select count (distinct b.sal) from scott.emp b ) count_sal
from scott.emp a
order by 1 desc
       SAL COUNT_SAL
      5000         12
      3000         12
      3000         12
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      2850         12
      2450         12
      1600         12
      1500         12
      1300         12
      1250         12
      1250         12
      1100         12
       950         12
       800         12
14 rows selected.
SQL> --
SQL> --Add a condition to the count for only salaries below or equal to the current salarySQL> --
SQL> select   a.sal,
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      3000          2
      3000          2
      2975          3
      2850          4
      2450          5
      1600          6
      1500          7
      1300          8
      1250          9
      1250          9
      1100         10
       950         11
       800         12
14 rows selected.
SQL> --
SQL> -- Add a condition to only pick the nth highest salary
SQL> --
SQL> select    a.sal,
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from scott.emp a
where (select count (distinct b.sal) from scott.emp b where a.sal <=b.sal) = 4
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Is there any known issue about mutex lock used in JNI on Solaris 10?

Dear Oracle,
I'm facing a strange behavior when running a JNI application that use the mutex lock. The application hanged after running for a while on one of our Solaris 10 machines. After investigating the stack trace of the application, it shows that one of all the application's threads that access the JNI hold the mutex lock forever, and that cause the other threads cannot access the JNI. The same application works fine on other Solaris 10 machines.
The mutex function I used as show below:
mutex_lock(&mutex)
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0xff2cc940 ___lwp_mutex_timedlock + 0x8
The Kernel version is SunOS 5.10 Generic_142900-14
Since this issue occurrs on only one Solaris 10 machine in our environment, we are wondering if there is any known issue regarding the mutex lock used in JNI on Solaris 10. We tried to search the Internet and the Java Bug database but found nothing related to this issue.
Best regards,
Krit K.

876587 wrote:
... and that cause the other threads cannot access the JNI. The same application works fine on other Solaris 10 machines.
Different environments mean just that. So something could be causing it outside java.
Additionally if anything at all is different in the execution data, such as even a name having a different size, then it would change the execution path.
Which would cause a problem in the JNI code to manifest itself on only one box. Probably isn't a pointer bug but all sorts of odd behavior can result from that.

Correlation Problem: unable to Use Correlation and Activate correlation

Hello,
i have created correlation name in correlation list and assigned involved messages and assigned proper field in correlaton in properties .i am able to view my correlation name in the properties of both receive steps ,but when i assign it to use correlation and move cursor to activate correlation .value in use correlation is not holding the value and holding space ,the same is happening to activate correlation field.
I am using PI 7.1.
Please let me know if you have really overcome this issue.
Regards,
Vishal K
Edited by: vishal kharat on Aug 3, 2011 6:15 PM

it seems there is no way.
See note 1797073
Is there someone with a better solution?

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Hello,
I have the same problem. My process has a Notification Wait exposed as a Web Service, but into the WSDL the method I would use to notify the process is described like this:
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Using correlation with asynch RFC - Please Help!

Hi !
We have this scenario:
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Matias,
You are right..u need to activate correlation step 3 and use it in step 4.
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Correlation Name: MatchPO
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PO_Number XSD simple Type xsd:string
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MI_Purchase_Order
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Hi All,
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Two Cents,
Karthick

Hi,
I had faced the same problem earlier also. The solution is very simple. You have to create another correlation with same properties as the first one but with a different name. Now you will definitely be able to select the correlation.Select any one of the 2 correlations as they are doing the same tasks.
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Thanks
Biswajit

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dbms_output.put('Adding: ' || :new.custid);
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When I try to do that using ODBC, I get this error:
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Trigger, procedure or function created with PL/SQL compilation error(s).
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The plot thickens...
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Server Msg: 24344, State: HY000, [Oracle][ODBC][Ora]
Trigger, procedure or function created with PL/SQL compilation error(s).
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Recieve Step -Use Correlation and Activate Correlation

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Many Thanks,
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Is it possible to implement an IMEI lock using USAT / STK on a SIM card ?

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AQ Locking Using Correlation ID

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