On Fri, Jun 10, 2011 at 9:28 PM, C. Bensend <be...@bennyvision.com> wrote:
> SELECT next_bill_date( '2011-01-01', '1 month', '4 months' ); > > > .. I expect the following result set: > > > next_bill_date > ---------------- > > 2011-07-01 > 2011-08-01 > 2011-09-01 > 2011-10-01 > > > http://www.postgresql.org/docs/8.4/interactive/plpgsql-control-structures.html#PLPGSQL-STATEMENTS-RETURNING CREATE OR REPLACE FUNCTION public.next_bill_date(d date, period interval, i interval) RETURNS SETOF date AS $function$ DECLARE max_date date; due_date date; BEGIN max_date := CURRENT_DATE + i; due_date := d; WHILE due_date + period <= max_date LOOP RETURN NEXT due_date; -- add d to the result set due_date := due_date + period; END LOOP; RETURN; -- exit function END; $function$ language plpgsql; testdb=# select next_bill_date('2011-06-11', '2 week', '3 month'); next_bill_date ---------------- 2011-06-11 2011-06-25 2011-07-09 2011-07-23 2011-08-06 2011-08-20
