Data Change Notification and streams

Hi,
I would like to know if Data Change Notification has something related with Streams.
At first glance, I would say no, but I cannot find any tech article to confirm this.
Can anyone help ?
Regards,
Gilles

Which version number ? Database ? 11g or 10g, whatever.
I am not sure DCN is based on AQ.
DCN does not need aq_tm_processes to be non null. It only needs job_queue_processes.
So, it let me suppose that it does not use AQ.
And I can find no technote describing the foundations of DCN.
http://www.oracle.com/technology/obe/11gr1_db/appdev/dcn/dcn.htm
Any idea ?

Similar Messages

Data Change Notification

Hi All,
I am asked to implement Oracle 10g Data Change Notification-DCN feature in one of our prod database.
I have configured the same and found that PL/SQL call out is capturing all DMLs and notification is being triggered.
I am configuring DCN on 10.2.0.3 running on RHEL 5.I believe,Oracle internally process the notification handle through trigger which may cause performance degradation.
I wanted to know performance impact of DCN.
Can i look forward have performance statistics or proc/cons of this feature?
Regards,
Bhavik Desai

Bhavik,
See if the following post(s) server your purpose:
DBMS_CHANGE_NOTIFICATION
http://www.oracle-base.com/articles/10g/dbms_change_notification_10gR2.php
Oracle® Database PL/SQL Packages and Types Reference 10g Release 2
http://download-uk.oracle.com/docs/cd/B19306_01/appdev.102/b14258/d_chngnt.htm
Regards,
Naveed.

Database Change Notification and TopLink Cache Invalidation

Has someone succeeed in implementing the How-to Database Change Notification and TopLink Cache Invalidation.
I have corrected some document errata about the pl/sql content and I manage to have messages in the 'notify_queue'.
I obtain the Topic in Java from this queue.
But the TopicSuscriber instances do not receive any message. Is there something to have in mind to make it work ?
Regards.

Reviving this thread again...
I am using DCN feature to build a middle-tier cache. I know oracle has problem sending physical rowid in case of 'Index Organized Table', however, in normal table also its not able to send proper rowid.
e.g, I have 2 records in Table A with rowid AAARIUAAGAAAV/uABw and AAARIUAAGAAAV/pAAX.
I have updated both the records. Strangely for the first record, oracle is sending INVALID rowid, although for the second record its sending the valid one.
Following is the output:
Row 1: (Wrong rowid being sent, AAARIUAAGAAAV/uABw is replaced with AAARIUAAGAAAXDCAAr)
Connection information : local=localhost.localdomain/127.0.0.1:47633, remote=localhost.localdomain/127.0.0.1:2278
Registration ID         : 2102
Notification version    : 1
Event type              : OBJCHANGE
Database name           : <sid>
Table Change Description (length=1)
    operation=[UPDATE], tableName=<table_name>, objectNumber=70164
    Row Change Description (length=1):
      ROW: operation=UPDATE, ROWID=AAARIUAAGAAAXDCAAr
Row 2: (Right rowid being sent, AAARIUAAGAAAV/pAAX)
Connection information : local=localhost.localdomain/127.0.0.1:47633, remote=localhost.localdomain/127.0.0.1:2278
Registration ID         : 2102
Notification version    : 1
Event type              : OBJCHANGE
Database name           : <sid>
Table Change Description (length=1)
    operation=[UPDATE], tableName=<table_name>, objectNumber=70164
    Row Change Description (length=1):
      ROW: operation=UPDATE, ROWID=AAARIUAAGAAAV/pAAX
Any idea ?

Don't see email accounts to change notifications and no notifications for TEXTS.

I have had carrier issued software release 10.2.1.2977 for awhile.
I noticed now that under Notifications --> Core Applications there is no mention of any of my email accounts.
(But I have no issue receiving or sending email via this Q10).
And although it seems that I can change notification for Text Messages, in practice there is no LED or Vibrate or Sound that happens when a text does arrive. (And again there is no issue receiving or sending texts via this Q10 BUT no notification of any type)
Any ideas to resolve these notification problems?
If not, I will be forced, albeit reluctantly to "starting fresh".
Having said that I am not sure the best and safest way to do this ie reinstall carrier OS and then restore what I have backed up using BB Link.
I would love to know of the easiest, safest way to do as I have described.
Thanks for your advice.
And yet as you can see I am able to make changes of NOTIFICATON for texts but whatever I choose I still don't get notification via LED or VIBRATION and for my email accounts which Ican't see LED and VIBRATE is working fine (but of course can't change them)!
I have had this official OS10 software for awhile...well before I noticed this problem.

If the apple id being used by iCloud isn't the one you want, go to settings > icloud > delete account. It doesn't actually delete the account, but it removes it from your device so you can put in the right apple id

Changing "Created Date" on image and other files.

I am scanning old family photographs and need to redate all of these photos. I would like to place them in actual date order, but iphoto doesn't allow that.
How can I change the "Created Date" on the .jpg files I'm creating on my iMAC?
Thanks!!
(And i'm fairly new to the MAC world, "I WAS A PC"..... ;-)

Hello & a warm welcome to the forums & Macdom!
There's the terminal method...
http://danilo.ariadoss.com/howto-change-date-modified-date-created-mac/
Then a couple of Apps to do it...
http://www.publicspace.net/ABetterFinderAttributes/
Mac App Store - File Date Changer 5
And Automator method...
http://reviews.cnet.com/8301-13727_7-57411491-263/how-to-batch-rename-files-usin g-automator-in-os-x/

Data Change Condition Expression

I need to create a product specification that includes dependencies between order components based on a data change notification wait condition
How do I define the XQuery expression in the "Data Change Condition Expression" field?
Specifically, I have 4 order components in the product specification that are independent of each other but each order component can only start when a specific data element has a certain value. The data element is at the order level and is not available as an order line item property.
I would appreciate if someone from Oracle can provide a more detailed explanation of the fields in the "Product Specification Editor Dependencies Subtab" ->"Wait Condition subtab"
Relative Path
Data Change Condition Expression
Thanks,
~nagu.
Edited by: nagu on Dec 2, 2011 5:50 PM

Provide two pieces of information:
1. Order Item Property
2. Boolean XQuery expression returning fn:true() to fire the dependency.
For example:
Assume you need to ensure all Provisioining items (From) must have reached the "PRODUCT STARTED" milestone , before the Billing Component Items (To) can start.
Note From Component is also known as "blocking" while the To Component is known as "Waiter"
1. Data Change Notification property: milestone
2. Data Change Condition Expression Xquery:
declare variable $blockingIndexes as xs:integer* external; (: list of From component items - index :)
let $expectedMilestoneCode := "PROVISION STARTED"
(: extract milestones values from all provisioning function items matching the expected milestone value , only for the given From component :)
let $milestoneValues := /GetOrder.Response/_root/ControlData/Functions/ProvisioningFunction/orderItem/orderItemRef[fn:index-of($blockingIndexes, xs:integer(@referencedIndex)) != 0]/milestone[text() eq $expectedMilestoneCode]
(: Return true only if ALL the milestones in the From component (ProvisioningFunction/orderItem/orderItemRef) are PROVISION STARTED :)
return fn:count($milestoneValues) eq fn:count($blockingIndexes)
Carlos

Data Change Condition Dependency

I would like to create a data change notification dependency for a product specification.
Can someone please provide an example of a xquery expression in the "Data Change Condition Expression" field?
I would like to create a condition so as to enable the transition for a specific line item only when an orderlineitem property contains a specific value , but i am not sure how I can access this info (orderlineitem property) from within the condition expression.

I think you just put the fixed value in the xquery field, such as
'this value means the next function can start'
When the field is then updated and with value 'this value means the next function can start' the function will start.
I ave tested this and it appeared to work fine.
Viktor

Journalizing data changes in relational source

Is there any standard way to allow user to add comments to data changes?
And then to show data changes for the specified fact upon request?
I am using relational data source, not Essbase…

Did you already have look at the "write-back" functionality in OBIEE?
regards
John
http://obiee101.blogspot.com/

Date changes for variant in se38

Hi Experts,
Can you please share me the reasons how release dates changes in variant while downloading CSV file for PO in se38.
In our system automatically release ddates has changed to past in the varainat in se38.
Will tehre be any effect while downloading CSV files for PO? What might be reasons for dates changes? And how can system pick the dates abnormally??
Thanks,
Shruthi.

Hi,
Appreciate for the response.
Actually our system is POs which cretaed in SAP picks up automatically through programs running on daily basis. There is a middleware connector which picks this POs in CSV format and send to the vendor.
If some times program fails to pick them, we will manually download CSV file and transmit manually through middle ware connector. We use se38 for this purpose.
We do this activity regularly. But now we are facing a problem like release dates got updated in this variant which are in Past ( 6months) back dates got updated and the POs relased on that dates transfreed to vendor. (There is a check with release date in programming).
Now my questions are:
1) How those past dates got updated?
2) Is there any relation ship with manually downloading to update these dates?
Please clarify.
Thanks
Swetha.

Database change notifications

Hi,
May i know the what is database change notifications and query result change notifications why these are used?
i Have seen some documents which i am not able to understand this.
Thanks& regards
Murali

Since you don't mention which documents you have read, nor what exactly your confusion is, I would suggest that you read the documentation:
http://download.oracle.com/docs/cd/B19306_01/appdev.102/b14251/adfns_dcn.htm

Service entry sheet date change box prompting in ML81n

Hi Gurus,
Can anyone tell me why this might be happening. Lets say we created a service entry sheet in the previous period and after performing the service i want to approve it. I cannot post to the previosu period because it is closed. I can only post to the current period. No doubt or confusion there. Even if i try to post to the previous period the system should prompt the date change box so that the user knows yes i have to put a date in the current period. But this does not seem to happen always. Sometimes the system prompts the date change box and sometimes it does not and directly gives the message error log of accpetance entry psoting and blah blah. Why is it that systemgives the date change box sometimes and sometimes it does not
Thanks
Anusha
Edited by: anusha vemulapati on May 13, 2009 5:37 PM

Dear Anusha,
System give the date change box only when your date not matching to MM posting period dates.If your dates is under MM posting date periods system is to question you.
befor posting,i mean you check dates with MM posting dates to curent dates.
mostly system allow previous month periods,if more than that system is not accept ,it is purely relation with posting periods issue,this type of question you can idetify in MIGO posting time
Hope this may helps you
Prem.

Options for auditing data changes

Hi Friends,
I thought I will get some inputs on my following implementation. The requirement is to audit some data changes with in the system.( Oracle 10.2 on RHEL 4.7 )
The audit is required in a sense that, the before images of data and information of who changed the data is required. I have looked at options like Oracle Auditing,FGA and so. But this cannot give me audit for the data changes,when and who changed.
The first thing that comes into my mind are using triggers . Another option is using log miner. I have successfully tested it out with both of these approaches. The environment is like
1 ) For some critical tables for which audit is required triggers were written ( ours is an OLTP application )
2 ) For some non critical tables, log miner which was called by a stored procedure which runs at certain periods is used.
3 ) audit data is stored in a different schema , with same table names as in base schema.
I would like to know your thoughts on this.
Thank You,
SSN

The delay with log miner is acceptable with some less critical audit tables and as you said, tirggers can be implemented for some critical tables.
One bottleneck with using logminer is that it depends on the availability of archived redo logs, the backup mechanism if any implemented should make sure that, no archive logs are removed from the locations specified for the audit program. The backup mechanism should ensure that all archived logs are processed by periodically running audit program which uses log miner.
Wondering if there is any other recommended approach for this.
Thanks
SSN

How do I get rid of a permanent Firefox Homepage Change Notification?

A Firefox page came up that said well this is embarrassing and then on top of that another small page came up that says Firefox homepage change notification and everytime i click on OK to revert to my previous home page nothing happens and it won't go away and I can't use Firefox because of it so how do I make it go away?

This is on Windows, Mac or Linux?
That notification may be from an add-on, and it probably can't do anything useful until you have dealt with the post-crash session restore page showing your previous session windows and tabs. Can you cancel the notification instead of clicking OK to see whether that works any better?
If not, try starting Firefox in its Safe Mode, which deactivates extensions and probably will bypass that change monitoring feature. Here's where there are some OS differences...
When Firefox is not running, to start Firefox in Safe Mode, hold down the:
* Windows: Shift key
* Mac: option key
while launching Firefox using its shortcut. A small dialog should appear. Click "Start in Safe Mode" (''not'' Reset).
Can you get through the session restore screen successfully?
''Linux users can use Terminal to start in Safe Mode.'' See https://support.mozilla.org/kb/troubleshoot-firefox-issues-using-safe-mode#w_how-to-start-firefox-in-safe-mode

WCF-SQL notification and SQL Change Data Tracking - incompatible?

Hi,
I have a DB with Change Data Tracking enabled on a particular table. Each time an Update/Insert is made on this table, I'm able to check what need to be synchronised with other systems by using the CHANGETABLE function of SQL Server.
And I want to use it with a Receive location WCF-SQL with inboundOperationType=Notification. So each time a modification is made on the table, I have a notification and I'm able to retrieve the updated/inserted records.
Unfortunately, it seems that using the CHANGETABLE is not supported in the NotificationStatement, I got the following error: "The notification callback returned an error. Info=Invalid. Source=Statement. Type=Subscribe.".
Any ideas to workaround?
Thanks.

Hi Johns-305,
Thank you for your response.
I'm not totally agreed with you about the notification because it depends on the situation.
In my case, I have a table in a remote SQL database where data are not changing often. But I want to retrieve the changes as fast as I can because it needs to be synchronised with a MDM.
The notification is great for me because I get a notification message just after a change and I can synchronise it. Of course, if my receive location is down I can't receive the notification but with the mechanism described in the MSDN article you pointed,
I can get the changes I missed during the outage.
And now I have a solution to use the notification and the Data Change tracking: I use a regular SELECT statement in the notification statement (SELECT <columns> FROM MYTABLE). If something changes in the table, I got a notification and then I send
a SELECT FROM CHANGETABLE(MYTABLE, ...) and I store the number of the last modification I got. So I can retrieve only the changes that occurs since my previous call.

Looking for Active Data Service samples with RDBMS change notification fire

Hi,
I am looking for samples/examples of Active Data Service when a server side event, like RDBMS change notification got triggered.
The ADS samples that I found so far are:
- Twitter http://www.oracle.com/technetwork/developer-tools/jdev/learnmore/65-activedataservicestwittersample-191314.pdf
- http://adfwithejb.blogspot.com/2012/12/active-data-service-with-active-image.html
- http://adfwithejb.blogspot.com/2012/12/active-data-serivce-with-data.html
But these samples do not demonstrate how RDBMS change notification got triggered got triggered. The last two samples have a Runnable class that simulate the triggering, and the Twitter example is twitter stream notification.
Please shed some lights on Active Data Service with RDBMS change notification got triggered.
Thanks
-Mina

Hi Mina,
Check this 2 resources, first a presentation made at OOW by Lucas Jellema: http://www.slideshare.net/lucasjellema/push-to-the-limit-rich-and-proactive-user-interfaces-with-adf-oracle-open-world-2011
second an interesting forum thread around the the topic: ADF BC and the Active Data Service using af:table from what I know this is still valid as of today.
After reviewing the topic there is also one more link that address this topic:
http://technology.amis.nl/2012/06/18/notifying-adf-applications-of-database-changes-fast-and-lean-using-database-query-result-change-notification-part-one/?utm_source=rss&utm_medium=rss&utm_campaign=notifying-adf-applications-of-database-changes-fast-and-lean-using-database-query-result-change-notification-part-one
Thanks,
JC
Edited by: Juan Camilo Ruiz on Jan 9, 2013 2:57 PM

Data Change Notification and streams

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