How to schedule the job to run evry Sunday at 12 P.M IST.

Question

Hi Experts,
I want to schedule a job which will run evry Sunday at 12 P.M IST.
I have written the below script.
[code]BEGIN
  SYS.DBMS_SCHEDULER.CREATE_JOB
       job_name        => 'SERVICE_SAL_FS.SAL_MESSAGE_BUFFER_PURGE_JOB'
      ,start_date      =>  SYSTIMESTAMP
      ,repeat_interval => 'FREQ=WEEKLY; BYDAY=SUN; BYHOUR=12;BYMINUTE=0; BYSECOND=0;'
      ,end_date        =>  NULL
      ,job_class       => 'DEFAULT_JOB_CLASS'
      ,job_type        => 'STORED_PROCEDURE'
      ,job_action      => 'SERVICE_SAL_FS.SAL_MESSAGE_BUFFER_PURGE_PROC'
      ,comments        => 'Run at 12 P.M.IST every Sunday'
      ,enabled            => TRUE
END;[/code]
But the server in US.
[code]SELECT sysdate from Dual;
6/11/2013 3:58:58 AM
--But the time in India is 02:28 PM [/code]
How to convert the timezone to IST.
Please help me how to schedule the job to run evry Sunday at 12 P.M IST.
Thanks.

Answer 1

Did you read DBMS_SCHEDULER docs:
  The calendaring syntax does not allow you to specify a time zone. Instead the Scheduler retrieves the time zone from the start_date argument. If jobs must follow daylight savings adjustments you must make sure that you specify a region name for the time zone of the start_date. For example specifying the start_date time zone as 'US/Eastern' in New York will make sure that daylight saving adjustments are automatically applied. If instead the time zone of the start_date is set to an absolute offset, such as '-5:00', daylight savings adjustments are not followed and your job execution will be off by an hour half of the year.
  When start_date is NULL, the Scheduler will determine the time zone for the repeat interval as follows: 
It will check whether the session time zone is a region name. The session time zone can be set by either:
Issuing an ALTER SESSION statement, for example:
SQL> ALTER SESSION SET time_zone = 'Asia/Shanghai'; 
  Setting the ORA_SDTZ environment variable.
  If the session time zone is an absolute offset instead of a region name, the Scheduler will use the value of the DEFAULT_TIMEZONE Scheduler attribute. For more information, see the SET_SCHEDULER_ATTRIBUTE Procedure.
  If the DEFAULT_TIMEZONE attribute is NULL, the Scheduler will use the time zone of systimestamp when the job or window is enabled.
SY.