Re: BUG #1993: Adding/subtracting negative time intervals

John R Pierce wrote:
> >> test=> select
> >> test-> ('2005-10-30 13:22:00-05'::timestamptz -
> >> test(> '2005-10-29 13:22:00-04'::timestamptz);
> >> ?column?
> >> ----------
> >> 25:00:00
> >> (1 row)
> >
> >
> > Is that actually the correct answer?
> >
> > Disregarding daylight savings, there is 25hrs between them. Once
> > daylight savings is taken into account there should be 24 or 26 hours
> > between them (southern/northern hemisphere respectively).
>
> the whole DST thing falls apart when you deal with places that don't
> respect it... arizona (except the navajo nation), for instance....
>
> it would be impossible to calculate the 'correct' answer without knowing
> the exact location...

Yes, I ran this in EST5EDT time, so the answer is correct for that
timezone.

--
Bruce Momjian | http://candle.pha.pa.us
pgman(at)candle(dot)pha(dot)pa(dot)us | (610) 359-1001
+ If your life is a hard drive, | 13 Roberts Road
+ Christ can be your backup. | Newtown Square, Pennsylvania 19073