From: Tom Lane <tgl@sss.pgh.pa.us>
To: Richard Huxton <dev@archonet.com>
Cc: thrasher@fibers.upc.es, pgsql-sql@postgresql.org, Thomas Lockhart <lockhart@fourpalms.org>
Subject: Re: Date trunc in UTC
Date: Thu, 21 Nov 2002 10:26:59 -0500
Message-ID: <11965.1037892419@sss.pgh.pa.us> (raw)
In-Reply-To: <200211211015.42013.dev@archonet.com>
References: <3DDB5991.9060706@fibers.upc.es>
<200211201306.47345.dev@archonet.com>
<3DDBAD02.3090406@electronic-group.com>
<200211211015.42013.dev@archonet.com>
Richard Huxton <dev@archonet.com> writes:
> Hmm - good point. You can revert to the client default but not to the
> previous value. I don't know of any way to read these SET values
> either - a quick poke through pg_proc didn't show anything likely.
In 7.3 you can use current_setting() and set_config() to access SHOW/SET
functionality. However, I agree with your suggestion of AT TIME ZONE
to rotate a timestamp into a target timezone, rather than mucking with
the TimeZone setting.
BTW, Thomas: is AT TIME ZONE supposed to accept
timestamp-without-timezone input? If so, what's it supposed to do with
it? The current behavior seems unintuitive to say the least:
regression=# select now();
now
-------------------------------
2002-11-21 10:19:14.591001-05
(1 row)
regression=# select now() at time zone 'UTC';
timezone
----------------------------
2002-11-21 15:19:18.588279
(1 row)
regression=# select localtimestamp;
timestamp
----------------------------
2002-11-21 10:19:22.629865
(1 row)
regression=# select localtimestamp at time zone 'UTC';
timezone
-------------------------------
2002-11-21 05:19:26.178861-05
(1 row)
It seems to me that the last case should give either an error or
2002-11-21 15:19:26.178861 (ie, assume that the timestamp without time
zone is in my TimeZone zone). In any case, surely the result should
be of type timestamp WITHOUT time zone?
regards, tom lane
Reply instructions:
You may reply publicly to this message via plain-text email
using any one of the following methods:
* Reply to all the recipients using the --to and --cc options:
reply via email
To: pgsql-sql@postgresql.org
Cc: tgl@sss.pgh.pa.us, dev@archonet.com, lockhart@fourpalms.org
Subject: Re: Date trunc in UTC
In-Reply-To: <11965.1037892419@sss.pgh.pa.us>
* Save the following mbox file, import it into your mail client,
and reply-to-all from there: mbox
This inbox is served by DDX for PostgreSQL; see mirroring instructions
for how to clone and mirror all data and code used for this inbox