Moving from DBMS_JOB to Oracle Scheduler

This section illustrates some examples of how you can take jobs created with the DBMS_JOB package and rewrite them using Oracle Scheduler, which you configure and control with the DBMS_SCHEDULER package.

Creating a Job

An example of creating a job using DBMS_JOB is the following:

VARIABLE jobno NUMBER;
BEGIN
 DBMS_JOB.SUBMIT(:jobno, 'INSERT INTO employees VALUES (7935, ''SALLY'',
   ''DOGAN'', ''sally.dogan@examplecorp.com'', NULL, SYSDATE, ''AD_PRES'', NULL, 
    NULL, NULL, NULL);', SYSDATE, 'SYSDATE+1');
 COMMIT;
END;
/

An equivalent statement using DBMS_SCHEDULER is the following:

BEGIN
 DBMS_SCHEDULER.CREATE_JOB(
   job_name          =>  'job1',
   job_type          =>  'PLSQL_BLOCK',
   job_action        =>  'INSERT INTO employees VALUES (7935, ''SALLY'',
     ''DOGAN'', ''sally.dogan@examplecorp.com'', NULL, SYSDATE,''AD_PRES'', NULL,
      NULL, NULL, NULL);');
   start_date        =>  SYSDATE,
   repeat_interval   =>  'FREQ = DAILY; INTERVAL = 1');
END;
/

Altering a Job

An example of altering a job using DBMS_JOB is the following:

BEGIN
 DBMS_JOB.WHAT(31, 'INSERT INTO employees VALUES (7935, ''TOM'', ''DOGAN'', 
   ''tom.dogan@examplecorp.com'', NULL, SYSDATE,''AD_PRES'', NULL,
   NULL, NULL, NULL);');
 COMMIT;
END;
/

This changes the action for JOB1 to insert a different value. An equivalent statement using DBMS_SCHEDULER is the following:

BEGIN
 DBMS_SCHEDULER.SET_ATTRIBUTE(
   name          => 'JOB1',
   attribute     => 'job_action',
   value         => 'INSERT INTO employees VALUES (7935, ''TOM'', ''DOGAN'', 
      ''tom.dogan@examplecorp.com'', NULL, SYSDATE, ''AD_PRES'', NULL,
      NULL, NULL, NULL);');
END;
/

Removing a Job from the Job Queue

The following example removes a job using DBMS_JOB, where 14144 is the number of the job being run:

BEGIN
   DBMS_JOB.REMOVE(14144);
COMMIT;
END;
/

Using DBMS_SCHEDULER, you would issue the following statement instead:

BEGIN
   DBMS_SCHEDULER.DROP_JOB('myjob1');
END;
/