Code or function to generate next working date for a given date

Question

hi,
First lets see the table struncture and table data.
CREATE TABLE LT_CA_HOLIDAYS
  HOLIDAY_DATE            DATE                  NOT NULL,
  IS_BANK_HOLIDAY         CHAR(1 BYTE)          NOT NULL,
  DISPLAY_NAME            VARCHAR2(35 BYTE)     NOT NULL
Insert into LT_CA_HOLIDAYS
   (HOLIDAY_DATE, IS_BANK_HOLIDAY, DISPLAY_NAME)
Values
   (TO_DATE('12/25/2010 00:00:00', 'MM/DD/YYYY HH24:MI:SS'), 'Y', 'Christmas Day');
Insert into LT_CA_HOLIDAYS
   (HOLIDAY_DATE, IS_BANK_HOLIDAY, DISPLAY_NAME)
Values
   (TO_DATE('01/01/2011 00:00:00', 'MM/DD/YYYY HH24:MI:SS'), 'Y', 'New Years Day');
Insert into LT_CA_HOLIDAYS
   (HOLIDAY_DATE, IS_BANK_HOLIDAY, DISPLAY_NAME)
Values
   (TO_DATE('01/17/2011 00:00:00', 'MM/DD/YYYY HH24:MI:SS'), 'Y', 'Martin Luther King Jr');
Insert into LT_CA_HOLIDAYS
   (HOLIDAY_DATE, IS_BANK_HOLIDAY, DISPLAY_NAME)
Values
   (TO_DATE('02/21/2011 00:00:00', 'MM/DD/YYYY HH24:MI:SS'), 'Y', 'Washington s B-Day');
Insert into LT_CA_HOLIDAYS
   (HOLIDAY_DATE, IS_BANK_HOLIDAY, DISPLAY_NAME)
Values
   (TO_DATE('05/30/2011 00:00:00', 'MM/DD/YYYY HH24:MI:SS'), 'Y', 'Memorial');
Insert into LT_CA_HOLIDAYS
   (HOLIDAY_DATE, IS_BANK_HOLIDAY, DISPLAY_NAME)
Values
   (TO_DATE('07/04/2011 00:00:00', 'MM/DD/YYYY HH24:MI:SS'), 'Y', 'Independence Day');
Insert into LT_CA_HOLIDAYS
   (HOLIDAY_DATE, IS_BANK_HOLIDAY, DISPLAY_NAME)
Values
   (TO_DATE('09/05/2011 00:00:00', 'MM/DD/YYYY HH24:MI:SS'), 'Y', 'Labor Day');
Insert into LT_CA_HOLIDAYS
   (HOLIDAY_DATE, IS_BANK_HOLIDAY, DISPLAY_NAME)
Values
   (TO_DATE('10/10/2011 00:00:00', 'MM/DD/YYYY HH24:MI:SS'), 'Y', 'Columbus Day');
Insert into LT_CA_HOLIDAYS
   (HOLIDAY_DATE, IS_BANK_HOLIDAY, DISPLAY_NAME)
Values
   (TO_DATE('11/11/2011 00:00:00', 'MM/DD/YYYY HH24:MI:SS'), 'Y', 'Verterans Day');
Insert into LT_CA_HOLIDAYS
   (HOLIDAY_DATE, IS_BANK_HOLIDAY, DISPLAY_NAME)
Values
   (TO_DATE('11/24/2011 00:00:00', 'MM/DD/YYYY HH24:MI:SS'), 'Y', 'Thanksgiving Day');
Insert into LT_CA_HOLIDAYS
   (HOLIDAY_DATE, IS_BANK_HOLIDAY, DISPLAY_NAME)
Values
   (TO_DATE('12/25/2011 00:00:00', 'MM/DD/YYYY HH24:MI:SS'), 'Y', 'Christmas Day');
Insert into LT_CA_HOLIDAYS
   (HOLIDAY_DATE, IS_BANK_HOLIDAY, DISPLAY_NAME)
Values
   (TO_DATE('12/26/2011 00:00:00', 'MM/DD/YYYY HH24:MI:SS'), 'Y', 'Bank Observed Christmas');
Insert into LT_CA_HOLIDAYS
   (HOLIDAY_DATE, IS_BANK_HOLIDAY, DISPLAY_NAME)
Values
   (TO_DATE('01/01/2012 00:00:00', 'MM/DD/YYYY HH24:MI:SS'), 'Y', 'New Years Day');
Insert into LT_CA_HOLIDAYS
   (HOLIDAY_DATE, IS_BANK_HOLIDAY, DISPLAY_NAME)
Values
   (TO_DATE('01/02/2012 00:00:00', 'MM/DD/YYYY HH24:MI:SS'), 'Y', 'Bank Observed New Years Day');
COMMIT;.
The requirement goes something like this:
Weekend days SATURDAY and SUNDAY ARE CONSIDERED holidays.
The list of holidays are in LT_CA_HOLIDAYS.
We will be given a date as p_processdate.we need to check if p_processdate is a holiday or a working day,
if p_processdate is a holiday then we need to generate the next working day .
If p_processdate is a working day we need to test whether p_processdate +1 is a working day, IF p_processdate+1 is a holiday then
we need to generate the next working day near to p_processdate + 1.
Regards

Answer 1

DECLARE
day_param date:=TO_DATE('01/16/2011','MM/DD/YYYY');--- SET your input date 
n_yes number;
BEGIN
     LOOP
             day_param:=day_param+1;
             select count(*) into n_yes from LT_CA_HOLIDAYS WHERE TO_CHAR(HOLIDAY_DATE,'MM/DD/YYYY')=TO_CHAR(day_param ,'MM/DD/YYYY') ANd IS_BANK_HOLIDAY='Y' ;
          IF(to_char (day_param,'DY') NOT IN ('SAT','SUN')) AND n_yes=0 THEN
               EXIT;
          END IF;
     END LOOP;
     DBMS_output.put_line('output'||day_param);
END;OUTPUT
output18-JAN-11
Edited by: Leonard on Aug 26, 2011 5:13 AM