Re: possible time change issue - known problem?

From: Martijn van Oosterhout <kleptog(at)svana(dot)org>
To: Dan Langille <dan(at)langille(dot)org>
Cc: pgsql-general(at)postgresql(dot)org
Subject: Re: possible time change issue - known problem?
Date: 2003-04-07 12:43:38
Message-ID: 20030407124338.GA6452@svana.org
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On Mon, Apr 07, 2003 at 08:19:57AM -0400, Dan Langille wrote:
> Looking at the code, I suspect the problem is related to this problem
> which I can duplicate on my current system: PostgreSQL 7.2.3 on i386-
> portbld-freebsd4.6, compiled by GCC 2.95.4
>
> # select current_date, (current_date - interval '1 day')::date;
> date | date
> ------------+------------
> 2003-04-07 | 2003-04-05
>
> I expect the answer to be 2003-04-06 (i.e. yesterday's date).

Out of curiosity, would this weekend be the day you switched to/from
daylight savings time? Then there were only 23 hours in the day, so 1 day
ago was actually the 5th.

Anyway, why not just:

select current_date, current_date-1;
date | ?column?
------------+------------
2003-04-07 | 2003-04-06
(1 row)

--
Martijn van Oosterhout <kleptog(at)svana(dot)org> http://svana.org/kleptog/
> "the West won the world not by the superiority of its ideas or values or
> religion but rather by its superiority in applying organized violence.
> Westerners often forget this fact, non-Westerners never do."
> - Samuel P. Huntington

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