DBMSScheduler

 DBMSScheduler

DBMS SCHEDULER

DBMS_SCHEDULER is a more sophisticated job scheduler introduced in Oracle 10g. The older job scheduler, DBMS_JOB, is still available, is easier to use in simple cases and fit some needs that DBMS_SCHEDULE

Create a job

BEGIN

  DBMS_SCHEDULER.CREATE_JOB (

     job_name           => 'my_java_job',
job_type           => 'EXECUTABLE',

     job_action         => '/usr/bin/java myClass',
repeat_interval    => 'FREQ=MINUTELY',
     enabled            => TRUE
  );
END;
 

 

Unlike DBMS_JOB you do not need to commit the job creation for it to be taken into account. As a corollary, if you want to cancel it, you have to remove or disable it (see below).

Remove a job

EXEC DBMS_SCHEDULER.DROP_JOB('my_java_job');

Run a job now

To force immediate job execution:

EXEC dbms_scheduler.run_job('myjob');

Change job attributes

Examples:

EXEC DBMS_SCHEDULER.SET_ATTRIBUTE('WEEKNIGHT_WINDOW', 'duration', '+000 06:00:00');

BEGIN

  DBMS_SCHEDULER.SET_ATTRIBUTE

     ('WEEKNIGHT_WINDOW', 'repeat_interval',

      'freq=daily;byday=MON, TUE, WED, THU, FRI;byhour=0;byminute=0;bysecond=0');

END;

Enable / Disable a job

BEGIN

  DBMS_SCHEDULER.ENABLE('myjob');

END;

BEGIN

  DBMS_SCHEDULER.DISABLE('myjob');

END;

Monitoring jobs

SELECT * FROM dba_scheduler_jobs WHERE job_name = 'MY_JAVA_JOB';

SELECT * FROM dba_scheduler_job_log WHERE job_name = 'MY_JAVA_JOB';

or checking from JOB owner schema

 SELECT * FROM user_scheduler_jobs WHERE job_name = 'MY_JAVA_JOB';

 SELECT * FROM user_scheduler_job_log WHERE job_name = 'MY_JAVA_JOB';

Use user_scheduler_jobs and user_scheduler_job_log to only see jobs that belong to your user (current schema).