From: Michael Glaesemann <grzm@seespotcode.net>
To: Louis-David Mitterrand <vindex+lists-pgsql-sql@apartia.org>
Cc: pgsql-sql@postgresql.org
Subject: Re: EPOCH TIMESTAMP Conversion Problem
Date: Tue, 1 Jan 2008 14:32:25 -0500
Message-ID: <B0EE8783-066E-4A79-9E86-C3AD6411E45B@seespotcode.net> (raw)
In-Reply-To: <20080101142837.GA24772@apartia.fr>
References: <7e7750290711070237x7da14616i383ace7f513f0882@mail.gmail.com>
<16805.1194449708@sss.pgh.pa.us>
<20080101142837.GA24772@apartia.fr>
On Jan 1, 2008, at 9:28 , Louis-David Mitterrand wrote:
> On Wed, Nov 07, 2007 at 10:35:08AM -0500, Tom Lane wrote:
>> "Amitanand Chikorde" <amit99rs@gmail.com> writes:
>>> I want to convert MAX(mydate) from myTable to Epoch.
>>
>> Do you mean
>> SELECT EXTRACT(EPOCH FROM MAX(mydate)) FROM myTable
>
> Is using casts for the same purpose deprecated?
>
> SELECT current_date::timestamp::abstime::int4;
EXTRACT is SQL-standard syntax which appeals to some people. The ::
casting syntax is a Postgres extension. And from the docs:
http://www.postgresql.org/docs/8.2/static/datatype-datetime.html> The types abstime and reltime are lower precision types which are
> used internally. You are discouraged from using these types in new
> applications and are encouraged to move any old ones over when
> appropriate. Any or all of these internal types might disappear in
> a future release.
Michael Glaesemann
grzm seespotcode net
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To: pgsql-sql@postgresql.org
Cc: grzm@seespotcode.net, vindex+lists-pgsql-sql@apartia.org
Subject: Re: EPOCH TIMESTAMP Conversion Problem
In-Reply-To: <B0EE8783-066E-4A79-9E86-C3AD6411E45B@seespotcode.net>
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