Automatically enable disabled jobs again

Question

Hi, in our company some jobs are executed during night which should be finish by next morning due to DB performance during daytime.
But sometimes they didn't run during night and the job status is DISABLED next morning.
Next morning all jobs cann be enabled manually without an error message.
Questions:
1) why do they get status DISABLED?
2) is there a possibility to change the status of a job back to SCHEDULED automatically to force executing the jobs during night?
Thank you very much for helpling!

Answer 1

Hi, thank you very much for your very quick answer!
- yes, we are talking about DBMS_SCHEDULER jobs created with exec DBMS_SCHEDULER.create_job ...
- we do not get status BROKEN - the status is DISABLED, and ALL jobs didn't run during nighttime at all
- there are no error messages reported selecting * from ALL_SCHEDULER_JOB_RUN_DETAILS where JOB_NAME = '<jobname>' and LOG_DATE > trunc ( sysdate - 1 ) order by LOG_DATE desc;
- also no error messages selecting * from ALL_SCHEDULER_JOB_LOG ...
You propose to execute following code all day and nigtht to 'wake up' jobs with status DISABLED:
Begin
For i in (select job_name from dba_scheduler_jobs where state='DISABLED')
Loop
dbms_scheduler.enable(name=>i.job_name);
End Loop;
End;
We tried this solution already - using this code in a new job.
But it didn't work as I wrote already that ALL jobs have status DISABLED next morning - also this new job.
Therefore this new job didn't 'wake up' the other jobs with status DISABLED.
How do you think it is possible to execute this code as well?
Starting it in a SqlPlus session?
That means that this session may not be closed - if closed, the code isn't executed anymore!
And what about DB shutdown and startup? Then the SqlPlus session with this code has to be started manually again -> this is not a good solution.
Is there another opportunity to execute this code in a better way than using a SqlPlus session?
Thank you!