Re: Calculation Error on Epoch?

"Josh Berkus" <josh(at)agliodbs(dot)com> writes:
> I'm having a problem with:
> SELECT date_part('epoch','2002-08-28'::TIMESTAMP)
> Which is consistently returning an epoch timestamp that evaluates to
> 8.27.2002. Is this a known issue? A cross-platform problem?

In 7.2 I get:

regression=# SELECT date_part('epoch','2002-08-28'::TIMESTAMP);
date_part
------------
1030507200
(1 row)

which seems to be correct given my timezone:

$ prdate 1030507200
time 1030507200 = Wed Aug 28 2002, 00:00:00 EDT

(prdate is a homegrown utility that just does strftime(localtime(...)))

It does seem to be broken in CVS tip, as I've complained to Thomas
at least once:

regression=# SELECT date_part('epoch','2002-08-28'::TIMESTAMP);
date_part
-----------
1030.4928 -- wrong
(1 row)

regression=# SELECT date_part('epoch','2002-08-28'::TIMESTAMPTZ);
date_part
------------
1030507200 -- right
(1 row)

What context are you testing in, and what do you get exactly?

regards, tom lane