Re: Getting the amount of overlap when using OVERLAPS

create or replace function test1() returns text as $$
DECLARE
mm varchar;
ma bool;
BEGIN
SELECT into ma (DATE '2001-02-16', DATE '2001-12-21') OVERLAPS (DATE
'2001-10-30', DATE '2002-10-30');
if (ma) then
select into mm (age(DATE '2001-02-16', DATE '2001-12-21')-age(DATE
'2001-10-30', DATE '2002-10-30'));
end if;
return mm;
END;
$$ language plpgsql strict;
select * from test1();

vish

On 9/22/05, Tony Wasson <ajwasson(at)gmail(dot)com> wrote:
>
> Given 2 date ranges, the overlaps functions returns TRUE or FALSE. I
> want to find the # of days that are overlapping. Is there a "built in"
> way to do this? Should I just write a function to do it?
>
> For instance, this example overlaps, but I want to know how much does
> it overlap?
>
> SELECT (DATE '2001-02-16', DATE '2001-12-21') OVERLAPS
> (DATE '2001-10-30', DATE '2002-10-30');
>
> Thanks in advance!
> Tony Wasson
>
> ---------------------------(end of broadcast)---------------------------
> TIP 5: don't forget to increase your free space map settings
>