Re: Timezone abbreviations - out but not in?

From: Alvaro Herrera <alvherre(at)commandprompt(dot)com>
To: Dave Page <dpage(at)pgadmin(dot)org>
Cc: Tom Lane <tgl(at)sss(dot)pgh(dot)pa(dot)us>, PostgreSQL-development <pgsql-hackers(at)postgresql(dot)org>
Subject: Re: Timezone abbreviations - out but not in?
Date: 2008-06-10 15:51:52
Message-ID: 20080610155152.GH5198@alvh.no-ip.org
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Dave Page wrote:
> On Tue, Jun 10, 2008 at 4:37 PM, Tom Lane <tgl(at)sss(dot)pgh(dot)pa(dot)us> wrote:
> > "Dave Page" <dpage(at)pgadmin(dot)org> writes:
> >> It seems like a bug that we happily output PKST as a timezone (in a
> >> 'timestamp with time zone'), but won't accept it back in.
> >
> > [ shrug... ] The set of timezone abbrevs recognized on input is
> > user-configurable, so that situation will always be possible.
>
> Right, but shouldn't we always output something we know we can read
> back in (unambiguously), assuming a server with no user defined
> abbreviations?

That makes no sense because it amounts to saying that we can't ever use
any abbreviation. A more useful restriction would be to only output
those that are in the set of input-acceptable abbreviations, but perhaps
this is not easy to implement.

--
Alvaro Herrera http://www.CommandPrompt.com/
PostgreSQL Replication, Consulting, Custom Development, 24x7 support

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