Oracle Job deleted after execution - oracle

Question

I'm on oracle 11g
I created a job named "MyJob" to be ran at a fixed date/hour.
The job is well created.
When the job is executed correctly at the fixed date/hour, the job is apparently deleted from the table dba_scheduler_jobs, I verified with this query:
SELECT owner, job_name, enabled FROM dba_scheduler_jobs;
My question is why the job is "deleted" ?
My job creation script:
BEGIN
DBMS_SCHEDULER.CREATE_JOB (
job_name => 'MyJobTest',
job_type => 'PLSQL_BLOCK',
job_action => 'BEGIN insert into test values (''01'',sysdate); END;',
start_date => '01/12/16 17:00:00,000000000 +01:00',
repeat_interval => NULL,
end_date => NULL,
enabled => TRUE,
comments => ' Insert into Test Table');
END;
/
Thanks in advance.

Answer 1

If you don't specify a repeat_interval and the auto_drop parameter is set to true (the default if you don't specify the parameter at all), Oracle will drop the job once it is run. Generally, if you're creating a job that runs once, there is no point in leaving it around forever.
You can tell Oracle not to auto drop the job by specifying an auto_drop value of false.
DBMS_SCHEDULER.CREATE_JOB (
job_name => 'MyJobTest',
job_type => 'PLSQL_BLOCK',
job_action => 'BEGIN insert into test values (''01'',sysdate); END;',
start_date => '01/12/16 17:00:00,000000000 +01:00',
repeat_interval => NULL,
end_date => NULL,
enabled => TRUE,
auto_drop => false,
comments => ' Insert into Test Table');