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

On Tue, 25 Oct 2005 08:51:59 +1000, Russell Smith <mr-russ@pws.com.au> wrote:
> Nicholas wrote:
> > postgres=# SELECT NOW()-interval '1 week';
> >            ?column?
> > -------------------------------
> >  2005-10-17 08:52:37.355219+10
> > (1 row)
> >
> > postgres=# SELECT NOW()-interval '-1 week';
> >            ?column?
> > -------------------------------
> >  2005-10-31 08:52:39.021583+11
>
> Looks to mee like Daylight Savings has conveniently started.

But the elapsed time for those results is only 6 days, 23 hours.

That's changed since v7.4.7

template1=# select now();
              now
-------------------------------
 2005-10-25 12:40:22.699545+10
(1 row)

template1=# select now() + '1 week'::interval;
           ?column?
------------------------------
 2005-11-01 13:40:33.85492+11
(1 row)

template1=# select now() - '-1 week'::interval;
           ?column?
-------------------------------
 2005-11-01 13:40:46.707656+11
(1 row)

template1=# select version();
                                                 version

--------------------------------------------------------------------------------
-------------------------
 PostgreSQL 7.4.7 on i686-pc-linux-gnu, compiled by GCC gcc (GCC) 3.2.2 20030222
 (Red Hat Linux 3.2.2-5)
(1 row)


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