-- -----------------------------------------------------------------------------------
-- File Name    : http://www.oracle-base.com/dba/10g/test_calendar_string.sql
-- Author       : Tim Hall
-- Description  : Displays the schedule associated with a calendar string.
-- Requirements : Access to the DBMS_SCHEDULER package.
-- Call Syntax  : @test_calendar_string (frequency) (interations)
--                @test_calendar_string \'freq=hourly; byminute=0,30; bysecond=0;\' 5
-- Last Modified: 27/07/2005
-- -----------------------------------------------------------------------------------

SET SERVEROUTPUT ON;
SET VERIFY OFF
ALTER SESSION SET nls_timestamp_format = \'DD-MON-YYYY HH24:MI:SS\';

DECLARE
  l_calendar_string  VARCHAR2(100) := \'&1\';
  l_iterations       NUMBER        := &2;

  l_start_date         TIMESTAMP := TO_TIMESTAMP(\'01-JAN-2004 03:04:32\',
                                               \'DD-MON-YYYY HH24:MI:SS\');
  l_return_date_after  TIMESTAMP := l_start_date;
  l_next_run_date      TIMESTAMP;
BEGIN
  FOR i IN 1 .. l_iterations LOOP
    DBMS_SCHEDULER.evaluate_calendar_string(  
      calendar_string   => l_calendar_string,
      start_date        => l_start_date,
      return_date_after => l_return_date_after,
      next_run_date     => l_next_run_date);
    
    DBMS_OUTPUT.put_line(\'Next Run Date: \' || l_next_run_date);
    l_return_date_after := l_next_run_date;
  END LOOP;
END;
/