Scheduler Job Runs Immediately After Enable When Using PL/SQL-expression (Doc ID 2420041.1)
APPLIES TO:
Oracle Database - Enterprise Edition - Version 11.2.0.4 to 18.1.0.0.0 Release 11.2 to 18
Oracle Database Cloud Schema Service - Version N/A and later
Oracle Database Exadata Cloud Machine - Version N/A and later
Oracle Cloud Infrastructure - Database Service - Version N/A and later
Oracle Database Cloud Exadata Service - Version N/A and later
Information in this document applies to any platform.
SYMPTOMS
A job created using DBMS_SCHEDULER, runs automatically after it is enabled, when REPEAT_INTERVAL is calculated by a function (repeat_interval =>'nextExecution',).
The job runs after it is enabled even if the NEXT_RUN_DATE is in the future.
- Create a table named testJobTab
SQL> create table testJobTab ( insertdate date);
- Create a procedure to insert into the table
SQL> create or replace procedure testJobinsert
is
BEGIN
insert into testJobTab (insertdate) values ( sysdate);
END;
/
- Create a function to calculate the date
SQL> create or replace function nextExecution
return date
is
BEGIN
return trunc(sysdate + 10);
END;
/
- make sure the table is empty
SQL> truncate table testJobTab;
- Create a job (disabled)
SQL> BEGIN
DBMS_SCHEDULER.create_job (
job_name => 'TESTJOB',
job_type => 'PLSQL_BLOCK',
job_action => 'BEGIN testJobinsert; commit; END;',
start_date => systimestamp at TIME zone 'EUROPE/BERLIN',
repeat_interval => 'nextExecution',
end_date => NULL,
enabled => FALSE,
comments => 'TESTJOB'
);
END;
/
- check the table
SQL> select * from testJobTab;
no rows selected
- check user_scheduler_jobs
SQL> set lines 300
SQL> col start_date for a50
SQL> col last_start_date for a50
SQL> col next_run_date for a50
SQL> col repeat_interval for a25
SQL> select start_date,run_count,last_start_date,next_run_date,enabled,schedule_type,repeat_interval from user_scheduler_jobs where job_name = 'TESTJOB';
START_DATE RUN_COUNT LAST_START_DATE
NEXT_RUN_DATE
ENABL SCHEDULE_TYP REPEAT_INTERVAL
13-MAR-18 08.45.52.057030 AM EUROPE/BERLIN 0
FALSE PLSQL nextExecution
- enable the job
SQL> exec DBMS_SCHEDULER.ENABLE('TESTJOB');
- check the table (job started after it was ENABLED)
SQL> select * from testJobTab;
INSERTDATE
13-MAR-2018 07:47:01
- check user_scheduler_jobs
There is a difference of 10 days between START_DATE/LAST_START_DATE and NEXT_RUN_DATE. LAST_START_DATE and RUN_COUNT confirms that the job has run.
SQL> select start_date,run_count,last_start_date,next_run_date,enabled,schedule_type,repeat_interval from user_scheduler_jobs where job_name = 'TESTJOB';
START_DATE RUN_COUNT LAST_START_DATE
NEXT_RUN_DATE
ENABL SCHEDULE_TYP REPEAT_INTERVAL
13-MAR-18 08.45.52.057030 AM EUROPE/BERLIN 1 13-MAR-18
08.47.01.342411 AM EUROPE/BERLIN 23-MAR-18 12.00.00.000000 AM +00:00
TRUE PLSQL nextExecution
- disable the job
SQL> exec DBMS_SCHEDULER.DISABLE('TESTJOB');
- check the table (the job did not run after it was DISABLED)
SQL> select * from testJobTab;
INSERTDATE
13-MAR-2018 07:47:01
- check user_scheduler_jobs
No modifications to RUN_COUNT, LAST_START_DATE and NEXT_RUN_DATE.
SQL> select start_date,run_count,last_start_date,next_run_date,enabled,schedule_type,repeat_interval from user_scheduler_jobs where job_name = 'TESTJOB';
START_DATE RUN_COUNT LAST_START_DATE
NEXT_RUN_DATE
ENABL SCHEDULE_TYP REPEAT_INTERVAL
13-MAR-18 08.45.52.057030 AM EUROPE/BERLIN 1 13-MAR-18
08.47.01.342411 AM EUROPE/BERLIN 23-MAR-18 12.00.00.000000 AM +00:00
FALSE PLSQL nextExecution
- enable the job again
SQL> exec DBMS_SCHEDULER.ENABLE('TESTJOB');
- check the table (notice that the job has run again)
SQL> select * from testJobTab;
INSERTDATE
13-MAR-2018 07:47:01
13-MAR-2018 07:53:32
- check user_scheduler_jobs
SQL> select start_date,run_count,last_start_date,next_run_date,enabled,schedule_type,repeat_interval from user_scheduler_jobs where job_name = 'TESTJOB';
START_DATE RUN_COUNT LAST_START_DATE
NEXT_RUN_DATE
ENABL SCHEDULE_TYP REPEAT_INTERVAL
13-MAR-18 08.45.52.057030 AM EUROPE/BERLIN 1 13-MAR-18
08.53.32.442546 AM EUROPE/BERLIN 23-MAR-18 12.00.00.000000 AM +00:00
TRUE PLSQL nextExecution
- drop the job
SQL> exec DBMS_SCHEDULER.drop_job ('TESTJOB');
SQL> drop table testJobTab purge;
SQL> drop function nextExecution;
SQL> drop procedure testJobinsert;
If REPEAT_INTERVAL is used with FREQ and INTERVAL (repeat_interval => 'FREQ=Minutely;INTERVAL=30'), the job does not run when is enabled which is the expected behavior.
CHANGES
CAUSE
This is caused by
BUG 27697734 - SCHEDULER JOB RUNS IMMEDIATELY AFTER DISABLE/ENABLE WHEN USING PL/SQL-EXPRESSION
SOLUTION
The BUG 27697734 - is regressed and tracking in Bug 28174090
Bug 28174090 - IMPDP FAILS WITH ORA-12005 WHEN USING JOBS HAVING PL/SQL REPEAT_INTERVAL
Download the Patch 28174090 from MOS and apply the Patch 28174090 to your current release and platform.