EVENT BASED SCHEDULER

Hi All,
I have two databases lets say A an B.
I have a STORED PROCEDURE on DATABASE B which runs everyday via a schecduler at 8 in the morning.
This procedure basically picks up data from a TABLE in database A and processes it everyday.
Now I want to modify the scheduler from the current one that runs at say 8 to one that runs the STORED PROCEDURE whenever data is inserted into the table.
Is it possibble in ORACLE?
Datbase version is 10g
Any help would be highly appreciated.

Elessar wrote:
Hi All,
I have two databases lets say A an B.
I have a STORED PROCEDURE on DATABASE B which runs everyday via a schecduler at 8 in the morning.
This procedure basically picks up data from a TABLE in database A and processes it everyday.
Now I want to modify the scheduler from the current one that runs at say 8 to one that runs the STORED PROCEDURE whenever data is inserted into the table.
Is it possibble in ORACLE?
Datbase version is 10gHere is one way of doing it:
Oracle Scheduler - Event Based Jobs.
One way of re-using it is, raising an Event trigger to Kick-off the jobs, preferably once data is inserted into tables. Definitely, this has to be done by the system performing the Inserts.

Similar Messages

Events Based Scheduling

Database Ver. 11gR2 (11.2.0.2.0)
Hi Guys,
How do you run jobs in oracle scheduler based on events? I have a job that needs to run after the successful completion of another job. I don't want to use chains. I have searched on the web, but all the examples I see are where a temp table is created and a row is inserted and then another PL/SQL block is run to manually pass a 'GO' value. I am looking for the a job to raise the JOB_SUCCEEDED event and then another job kicks in based on this event.
Any detailed examples would be greatly appreciated. Also if using any other PL/SQL package, what necessary privileges would be required to execute that package.
Thanks in advance.
VB

Here is a simple example. You create a job, MY_JOB, that raises the job_succeeded event. You also create an event-based job, MY_JOB_CONSUMER, that consumes event messages from sys.scheduler$_event_queue but only for job_succeeded events raised by MY_JOB.
First you let the user subscribe to the Scheduler event queue using the ADD_EVENT_QUEUE_SUBSCRIBER procedure. “my_agent”, or whatever name you use, is the name of the Oracle Streams Advanced Queuing (AQ) agent to be used to subscribe to the Scheduler event queue. This call both creates a subscription to the Scheduler event queue and grants the user permission to dequeue using the designated agent. The subscription is rule-based. The rule permits the user to see only events raised by jobs that the user owns, and filters out all other messages:
DECLARE
   agent_already_subscribed_exp   EXCEPTION;
   PRAGMA EXCEPTION_INIT (agent_already_subscribed_exp, -24034);
BEGIN
   sys.DBMS_SCHEDULER.add_event_queue_subscriber ('my_agent');
EXCEPTION
   WHEN agent_already_subscribed_exp
   THEN
      NULL;
END;
/Then you create MY_JOB_CONSUMER:
BEGIN
   sys.DBMS_SCHEDULER.create_job (
      job_name          => 'MY_JOB_CONSUMER',
      job_type          => 'PLSQL_BLOCK',
      job_action        => '/* Add you code here */ NULL;',
      event_condition   => 'tab.user_data.event_type = ''JOB_SUCCEEDED'' and tab.user_data.object_name = ''MY_JOB''',
      queue_spec        => 'sys.scheduler$_event_queue,my_agent',
      enabled           => TRUE);
END;
/Now, MY_JOB_CONSUMER is waiting for a message to arrive in sys.scheduler$_event_queue. It will dequeue it only if the condition in event_condition is true.
Create a one time job, MY_JOB, set its raise_events attribute to job_succeeded and enable it:
BEGIN
   sys.DBMS_SCHEDULER.create_job (job_name     => 'MY_JOB',
                                  job_type     => 'PLSQL_BLOCK',
                                  job_action   => '/* Add you code here */ NULL;',
                                  start_date   => SYSTIMESTAMP AT TIME ZONE 'US/Pacific',
                                  auto_drop    => TRUE,
                                  enabled      => FALSE);
   DBMS_SCHEDULER.set_attribute ('MY_JOB', 'raise_events', DBMS_SCHEDULER.job_succeeded);
   sys.DBMS_SCHEDULER.enable ('MY_JOB');
END;
/When MY_JOB executes, it will enqueue a message in sys.scheduler$_event_queue. MY_JOB_CONSUMER will then pick it up and consume it.
Hope that simple demonstration helps.

SCMA - Event based Scheduling in Schedule manager

Hi all,
Like SM36, can we schedule things in Schedule Manager based on system events?
Please let me know how to do this, if it is possible.
Thanks,
Vishal.

If you are using OBIA with informatica check this
https://forums.oracle.com/message/10538475#10538475
Thanks,
Saichand

Event based scheduler job - 2 events at the same time only 1 run

Hi,
i converted our dbms_job - jobs to the newer package dbms_scheduler.
It is a 10.2.0.4 patch 23(8609347) database on an windows server 2003 R2 Enterprise x64 Edition SP2.
The Jobs(about 130) are nothing special ... only some statistics, matview-refreshes and so on.
For the notification of failed jobs and jobs which run over the max_run_duration i downloaded and installed the job notification package.
The jobs are assigned to different departments and the corresponding developer teams in our company.
I created a notification job for each department and if a job fails we (the database administrators) and the corresponding deverlopers will be informed.
Now i ascertained that only 1 email will be send if 2 jobs of the same department fails at the same time.
The emailer-jobs are auto-generated by the job notification package. I only modified them to look after all jobs of special department and not only after one job. (--> event_condition ... object_name LIKE 'XXX%')
example for dba-jobs(copy of the script output of TOAD):
SYS.DBMS_SCHEDULER.CREATE_JOB
       job_name        => 'DBA_JOBS_EMAILER'
      ,start_date      => NULL
      ,event_condition => tab.user_data.object_name LIKE ''DBA%'' AND tab.user_data.event_type in (''JOB_FAILED'',''JOB_OVER_MAX_DUR'')'
      ,queue_spec      => 'SYS.SCHEDULER$_EVENT_QUEUE, JOB_FAILED_AGENT'
      ,end_date        => NULL
      ,program_name    => 'SYS.EMAIL_NOTIFICATION_PROGRAM'
      ,comments        => 'Auto-generated job to send email alerts for jobs "DBA%"'
    );I thought that a queue is used to manage all events from the scheduler jobs. So i made a test with 2 dba jobs and simulated a failure at the same time but i received only one mail.
So what is happend with the second event? I looked for the events in the qtab(SCHEDULER$_EVENT_QTAB) which belongs to the event queue(SYS.SCHEDULER$_EVENT_QUEUE) and no event was missing.
So i think the emailer job has to run 2 times.
Is anyone able to explain or to find my mistake?
I know that the easiest way is to create one emailer job for each normal job but i think this is a little bit costly because all the arguments are the same for one department.
Thanks & Regards

Thanks for your fast answer.
You are right with the "enabled => TRUE;" part and i only forgot to post it.
So the Job is enabled (otherwise it would not send any mail). Because it is sending one mail i think it is also not necessary to hand over a job_type.
Additionally the job starts a program ... so it is right to set the job_type='STORED_PROCEDURE' isn't it?
And also right ... i already added the agent as subscriber to the queue.
Anyway i think the whole thing do what it have to do. So in my oppinion there are no big mistakes in creating the job or at adding the subscriber.
There are also no problem in raising the events by itself and enqueue them in the scheduler event queue.
There is only a problem when 2 jobs fails (or run out ouf max duration) at exactly the same time.
If i understand it right:
The agent/subscriber will find the "JOB_FAILED"-event for the first Job in the queue and starts the emailer Job.
The agent will also find the "JOB_FAILED"-event for the second Job and wants to start the emailer Job again.
I don't know if this is really the problem but perhaps the emailer-job can not be started in consequence of the second event because ist is already running.
I also don't know if this is a mistake of the agent or of the emailer-job by itself.
I only want that it runs two times (one run for each event). I my case it also doesn't matter which email is send at first.

Problem with event based scheduling

Hi,
We are having a ETL job running everynight, so i need to have daily
report as soon as my ETL job is finished. For that we have run some
script to create a event file after completion of ETL job. And by using
this event file we have scheduled a report that runs after this event
file is created. Now the problem is that the scheduled report is
generated before the ETL job is finished. This seems to be working fine
till last month, but this month we are facing this issue. my question
is why the scheduler is triggered before the event file is created
(event file is created after the completion of ETL job)
Do anybody faced this iss
FYI
We are on BO XI 3.1 with no SP's and FP's and on windows environment.
Do anybody faced this issue?Any advise is appreciated.
Thanks,

Hi,
We are also on BO XI 3.1 with no SP's and FP's. We create Event files after the ETL jobs are completed. These files are used to create BO Events (File), which are used as scheduling criteria before the Reports can run. These files are deleted daily before the next files are created, something you might want check.
Mike

Re: Events Based Scheduling

Hi Eddie,
I tried to create the jobs in the similar way.
When creating the second job, I am getting the following error report -
Error report:
ORA-00600: internal error code, arguments: [opibnd1], [], [], [], [], [], [], [], [], [], [], []
ORA-06512: at "SYS.DBMS_ISCHED", line 124
ORA-06512: at "SYS.DBMS_SCHEDULER", line 314
ORA-06512: at line 2
00600. 00000 - "internal error code, arguments: [%s], [%s], [%s], [%s], [%s], [%s], [%s], [%s]"
*Cause:    This is the generic internal error number for Oracle program
           exceptions. This indicates that a process has encountered an
           exceptional condition.
*Action:   Report as a bug - the first argument is the internal error number
Requesting you to let us know if there is any other simple way to do this.
Thanks.

Hi Eddie,
I tried to create the jobs in the similar way.
When creating the second job, I am getting the following error report -
Error report:
ORA-00600: internal error code, arguments: [opibnd1], [], [], [], [], [], [], [], [], [], [], []
ORA-06512: at "SYS.DBMS_ISCHED", line 124
ORA-06512: at "SYS.DBMS_SCHEDULER", line 314
ORA-06512: at line 2
00600. 00000 - "internal error code, arguments: [%s], [%s], [%s], [%s], [%s], [%s], [%s], [%s]"
*Cause:    This is the generic internal error number for Oracle program
           exceptions. This indicates that a process has encountered an
           exceptional condition.
*Action:   Report as a bug - the first argument is the internal error number
Requesting you to let us know if there is any other simple way to do this.
Thanks.

Event Base Scheduling In ODI

Hi,
I have two question:-
1) is there any concept like event based scheduling in odi??
2)I have two two scenario scheduled at different time.I want if the first scheduling is complete the next scheduleing will start(otherwise not).Is it possible in odi?
If yes then please reply how??
Thanks

1) You can use some tools in your package that wait for the event. Ex : "Odi File Wait" (the event is a file) ; "Odi Wait for Data" (the event is an satisfied SQL Statement ) ; ODI Wait for Child Session (the event is another ODI Session)
Your ODI scenario will be always in "run state", but it will just wait the event before executing the data flow.
2) I assume you can do this with LOAD PLAN (available in ODI 11g)

Scheduler - Event Based Jobs

Hi,
I've been trying to create an event based job dependent on multiple jobs. I tried queuing, but it seems like it can only hand one Job at a time. Also, chains were recommended to me, but I want the Job to run on the dependence on the Job that ran on specific program at the specific time. I currently know that chains can only handle, programs, other chains and/or events.
In my mind chains wouldn't work, because If I wanted to run Job3 dependent on the outcome of Job1 running Program1 and Job2 running Program2, chains wouldn't be able to accomdate that. For it to happen in chains I would have to attach Program1 and Program2 to the new chain Job and that is not exactly what I would want.
Can anyone help/clarify this situation for me. Thank you.
Tony

Hi Tony,
So the requirement is to run a job after 2 prior jobs have completed.
There are two ways I can think of to do this, both using events. In both cases you need to set job A and job B to raise events on completion (succeeded, failed or stopped) and setup an agent for the Scheduler event queue in the schema in which you are working
dbms_scheduler.add_event_queue_subscriber('myagent')
In order to get Job C to start after jobs A and B have completed there are 2 options.
1) Let job C point to a chain and start running whenever job A has completed. The chain will have 2 steps, one event step waiting on B and one that runs your task C. An event step does nothing but wait for a particular event and complete successfully when the event is received. The second step will run when the event step waiting on job B has completed.
So your chain would look something like
begin
dbms_scheduler.create_chain('chain1');
dbms_scheduler.define_chain_event_step('chain1','stepB',
'tab.user_data.object_name = ''JOB_B'' and
tab.user_data.event_type IN(''JOB_SUCCEEDED'',''JOB_FAILED'',''JOB_STOPPED''',
'sys.scheduler$_event_queue,myagent');
dbms_scheduler.define_chain_step('chain1','stepC','finalTaskProg');
dbms_scheduler.define_chain_rule('chain1','true','start stepB');
dbms_scheduler.define_chain_rule('chain1', 'stepB completed', 'start stepC');
dbms_scheduler.define_chain_rule('chain1', 'stepC completed', 'end');
dbms_scheduler.enable('chain1');
end;
And your job would point to the chain and run whenever job_A completes (similar condition and queue_spec). It would keep waiting till job_B runs and then the final task would run and it would complete.
2) The second way is to require job_A to insert a row into a table somewhere. Rule conditions can access table data so you could have job_C have an event condition which checks for a completion event for job_B and checks the table to see whether job_A has completed. Then the code you run should then remove the row in the table
e.g.
queue_spec=>'sys.scheduler$_event_queue,myagent'
event_condition=>'tab.user_data.object_name = ''JOB_B'' and
tab.user_data.event_type IN(''JOB_SUCCEEDED'',''JOB_FAILED'',''JOB_STOPPED''' and
(select count(*) from mytab where col='job_A')>0'
Then when running C do - delete from mytab where col='job_a';
Both of these assume that job_A always completes before job_B but both of these will then run job_C after job_B completes. Modifying either of these so that either job A or B runs first is also possible by having another job that waits on A rather than B.
Hope this helps, if you have any more questions, let me know.
-Ravi

Need help on event based report scheduling on webi 3.2

Hi All,
I need to add/remove trigger events on scheduled report instances.
I have around 100 scheduled report instances and want to add a event trigger.
I do not want to reschedule all the instances one by one with new event trigger.
Is there any way that i can add event trigger to all the instances at once ?
Thanks,
Alorika

Hi
Can you please tel me hoe to view these report properties in R3.
If I go to schedule, It allows to set a new schedule but I want to view the existing settings.
Please guide.
Thanks ,

How to create event based process chains

Hi All,
I would like to know about event based process chains. In connection to this, could you please answer the following queries,
1. How to create events
2. How to link created event to the process chain in the same BI or BW system and as well as from
    externel BI system.
3. How link one process chain with other process chain (i.e, After completion of one process chain, it
    should trigger other dependent process chain)
Thanks and Regards,
Kotesh.

1). Doubt regarding first question.
For example, i would like to create time based event (it should be trigger daily at specified time),
where we have to maintain scheduling options while creating event.
When i checked SM62 there i found only two options a). Event name and b). Description.
Could please send any doucument link if you have.
Ans : You can use function modules like "BP_EVENT_RAISE" in a program and schedule the program to trigger.
2). For externel BIW system also same procedure we need to follow or any difference.
Ans : Externally you need to trigger the same event.
3). i found dependent process chain also had scheduling options as direct scheduling insted of start using meta chain or API. As you said dependent process chain should be mata chain. it seems dependent process chain may be Meta chain or Direct scheduilg.
Ans : Its your choice how you want to schedule it.You can either make that dependent chain a metachain or schedule it separately.
I found at the end of first process chain they kept one process like Raise event and second process chain connected with the help of raise event process event name. If you have any idea about this process could explain a bit more.
Ans : May be they are raising the event in the main chain and triggering the dependent chain using this event.
But Metachain is preferred for such thing.Though it does similar thing.
Hope this helps.

Query on event based job in a client schema and not SYS schema

Hi, I am fairly new to oracle job scheduler and wanted your inputs on how to create a event based job that sends a mail based on success of another job.
I was able to implement this with the jobs being created under SYS schema. I did get email notifcation when errors were logged in exception table.
However, now the requirement has changed to create the jobs under a client specific schema.
The jobs got created successfully in CLIENT schema but the event based job is not working. It does not send the email notification.
I feel this is to do with not correctly subscribing to the event queue {sys.scheduler$_event_queue}.
Can CLIENT schema use the agent "AGENT" created under SYS to subscribe to the Scheduler event queue {sys.scheduler$_event_queue}? CLIENT is the schema in which the all jobs and procedures are created.
BEGIN
DBMS_AQADM.ENABLE_DB_ACCESS('AGENT', 'CLIENT');
END;
--Main Job that will load data and errors will be logged into exception table
BEGIN
dbms_scheduler.create_job( job_name=> 'CLIENT.LOAD_DATA',
job_type=>'PLSQL_BLOCK',
job_action=>'BEGIN CLIENT.p_loaddata;
END;',
start_date=>systimestamp,
repeat_interval=>'FREQ=MINUTELY;INTERVAL=1;',
number_of_arguments=>0,
enabled=> true);
END;
--set raise_events attribute = job_succeeded for main job
BEGIN
DBMS_SCHEDULER.set_attribute ('CLIENT.LOAD_DATA', 'raise_events', DBMS_SCHEDULER.job_succeeded);
END;
--Event Job that will send email based on condition. Condition is checked in procedure CLIENT.p_check_sendmail; If errors are found in the exception table, this job will raise exception and will be JOB_FAILED status. This job will send a email notification.
BEGIN
DBMS_SCHEDULER.create_job (       job_name          => 'CLIENT.EMAIL_JOB',
job_type          => 'PLSQL_BLOCK',
job_action        => 'BEGIN CLIENT.p_check_sendmail;                                   END;',
event_condition => 'tab.user_data.event_type = ''JOB_SUCCEEDED'' and tab.user_data.object_name = ''LOAD_DATA''',
queue_spec        => 'sys.scheduler$_event_queue,AGENT',
enabled          => true);
END;
BEGIN
dbms_scheduler.add_job_email_notification ( job_name => 'CLIENT.EMAIL_JOB',     recipients => '[email protected]',events => 'JOB_FAILED');
END;
Is the way i am subscribing to the event queue correct? Could you please share an example/document of event based job in a schema other than SYS and how subscription is being done to event queue?
Thanks

Hi,
It's a good decision you made because you shouldn't create objects in the SYS schema. I see you're using the add_job_email_notification procedure, so I'm assuming you're on 11g onwards.
This procedure is meant to make the job easy for you. That is, you don't need to worry about setting up AQ, the procedure does it all for you. All you need to do is setup the mail server if not already done, and call this procedure to add the mail notification. That's it.
You can also specify a filter to the add_job_email_notification procedure, so maybe you could specify directly your CLIENT.LOAD_DATA job to this procedure.

Error in creating event based jobs.

while trying to creating event based jobs. I am getting below error
ORA-00904: "SYS"."SCHEDULER$_QP_5187"."F3": invalid identifier
ORA-06512: at "SYS.DBMS_ISCHED", line 99
ORA-06512: at "SYS.DBMS_SCHEDULER", line 295
ORA-06512: at line 2
I am using 10g database.
Even below small procedure is not working.
begin
DBMS_SCHEDULER.create_job
                     ('test1F' ,
                      job_type             => 'plsql_block',
                      job_action           =>    'begin test_proc end;',
                      event_condition      =>    'tab.user_data.object_name ='' test'' and tab.user_data.event_type = ''JOB_FAILED''',
                      queue_spec           => 'sys.scheduler$_event_queue,myagent',
                      enabled              => TRUE
end; and
Myagent is subscribe to
SELECT consumer_name
FROM dba_queue_subscribers
WHERE queue_name = 'SCHEDULER$_EVENT_QUEUE';
MYAGENT
SCHEDULER$_EVENT_AGENTEdited by: ma**** on 25-Aug-2012 01:55

Please lock this thread, post to the scheduler forum, and when you do include sufficient information for someone to help you ... this isn't it.
What version number.
What is the code you are running?
In what schema with what explicit and role-based permissions?
At what point do you get the error? The way it is posted, above, it is impossible to be sure.

Documentation for tab.user_data with event based jobs

Hi,
Are all the atributes for tab.user_data when used as part of an event based job documented somewhere?
I have been looking but all I can find are examples rather than explicit documentation.
Thanks
Pete

Hi Pete,
The type of the object tab.user_data is the type used to create the AQ queue with. So it varies depending on the type you used to create the queue with.
If you are consuming messages from the scheduler event queue, the type is sys.scheduler$_event_info and to figure out what fields it has you can use
desc sys.scheduler$_event_info
Hope this helps,
Ravi.

Time and event-based jobs

Jobs scheduled based on time in DBMS_SCHEDULER. Can we changed to event-based without dropping the job?
Thanks in advance.

Hi,
You can try this :
- disable the job
- set event_spec to be NULL for the job e.g.
exec dbms_scheduler.set_attribute_null('j1','event_spec')
- use set_attribute to set your time-based schedule
- re-enable the job
This should work.
Hope this helps,
Ravi.

Event based job

we have a job that needs to be restarted after db reboot,is it possible to create an event based inside oracle that starts the queue and our main job for us ?
v11.2

Hello;
Oracle has an System Event Trigger "AFTER STARTUP" which could be used for this.
"Ask Tom" has a note on this with example :
http://asktom.oracle.com/pls/apex/f?p=100:11:0::::P11_QUESTION_ID:49818662859946
( This shows after logon, but you should be able to use the example with the other trigger )
Best Regards
mseberg
OR
http://www.datadisk.co.uk/html_docs/oracle/scheduler.htm
http://psoug.org/reference/dbms_scheduler.html
Edited by: mseberg on Nov 3, 2011 9:31 AM

EVENT BASED SCHEDULER

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