Gunther Oracle APEX und Datenbank Wiki

Scheduler Calendaring Syntax verwenden.

Bei DBMS_SCHEDULER.create_schedule kann ein Zeitintervall angegeben werden.

Die Syntax ist recht komplex siehe dazu die orginal Dokumentatorin unter ⇒http://docs.oracle.com/cd/E11882_01/appdev.112/e40758/d_sched.htm#ARPLS72273 ( nach repeat_interval suchen), für 12c siehe https://docs.oracle.com/en/database/oracle/oracle-database/12.2/admin/scheduling-jobs-with-oracle-scheduler.html#GUID-10B1E444-8330-4EC9-85F8-9428D749F7D5

Beispiele:

Der Calender Ausdruck kann mit DBMS_SCHEDULER.EVALUATE_CALENDAR_STRING getestet werden.

DECLARE	
	v_next_run_date TIMESTAMP;
	v_start_date    TIMESTAMP:=systimestamp;  
        v_return_date_after TIMESTAMP
BEGIN
  FOR i IN 1 ..10
  loop
  DBMS_SCHEDULER.EVALUATE_CALENDAR_STRING(  
		  calendar_string   => 'FREQ=MINUTELY; INTERVAL=15'
		, start_date        => v_start_date
		, return_date_after => v_return_date_after 
		, next_run_date     => v_next_run_date);
 
	DBMS_OUTPUT.PUT_LINE('-- Info actual date :: '||to_char(v_start_date,'dd.mm.yyyy hh24:mi')||
	                     '   --> next_run_date:: '||to_char(v_next_run_date,'dd.mm.yyyy hh24:mi')
	);
         v_return_date_after := v_next_run_date;
  END loop;
END;
/
 
-- Info actual date :: 16.01.2015 19:19   --> next_run_date:: 16.01.2015 19:34
 
-- als Funktion
 
CREATE OR REPLACE FUNCTION getNextRunDate(p_calendar_string      varchar2
                                         ,p_start_date           TIMESTAMP WITH TIME ZONE DEFAULT systimestamp
                                         ,p_return_date_after    TIMESTAMP WITH TIME ZONE DEFAULT systimestamp)
   RETURN DATE
IS
   v_next_run_date   TIMESTAMP WITH TIME ZONE;
BEGIN
   dbms_scheduler.EVALUATE_CALENDAR_STRING(calendar_string     => p_calendar_string
                                          ,start_date          => p_start_date
                                          ,return_date_after   => p_return_date_after
                                          ,next_run_date       => v_next_run_date);
 
   RETURN v_next_run_date;
END;
/
 
-- abfragen über alle Jobs wann die Jobs das nächste mal und das übernächste mal laufen würden:
 
SELECT js.job_name
      , JS.REPEAT_INTERVAL
      , js.next_run_date
      , getNextRunDate(JS.REPEAT_INTERVAL,js.next_run_date,js.next_run_date) AS over_next_run_date
      , js.state||' - '||js.job_action  AS job_info     
    FROM dba_scheduler_jobs js
       , dba_objects o
   WHERE     js.owner = o.owner(+)
         AND js.job_name = o.OBJECT_NAME(+)
         AND js.owner != 'SYS'
/         

Nachträglich ändern:

BEGIN
DBMS_SCHEDULER.SET_ATTRIBUTE (
     name       => 'CHECK_LONG_RUNNING_TIMEPLAN'
   , attribute  => 'repeat_interval'
   , VALUE      =>  'FREQ=MINUTELY; INTERVAL=15');
END;
/
 
 
SELECT * 
  FROM dba_scheduler_schedules 
 WHERE schedule_name = 'DBA_TIMEPLAN'
/ 

Oracle Doku: https://docs.oracle.com/en/database/oracle/oracle-database/12.2/admin/scheduling-jobs-with-oracle-scheduler.html#GUID-10B1E444-8330-4EC9-85F8-9428D749F7D5

Crontab Generator = > https://crontab-generator.org/