From: Achilleus Mantzios <achill@matrix.gatewaynet.com>
To: Michael Glaesemann <grzm@myrealbox.com>
Cc: Pedro B. <pedro.borracha@netcabo.pt>
Cc: pgsql-sql@postgresql.org
Subject: Re: Datetime
Date: Tue, 3 Aug 2004 14:50:43 +0300 (EEST)
Message-ID: <Pine.LNX.4.44.0408031449340.7249-100000@matrix.gatewaynet.com> (raw)
In-Reply-To: <9F40F448-E540-11D8-8966-000A95C88220@myrealbox.com>
O kyrios Michael Glaesemann egrapse stis Aug 3, 2004 :
>
> On Aug 3, 2004, at 7:23 PM, Achilleus Mantzios wrote:
>
> > now() returns the current UNIX (your running UNIX right?) timestamp
> > which
> > in turn is
> > measured in seconds,miliseconds since the epoch.
> > i.e. 1970-01-01 00:00:00
>
> I believe this is incorrect. I believe PostgreSQL uses its own
Do you suggest postgresql has any other means of getting
time except the time(2) syscall??
> timestamp datatype internally (which is, indeed, not as text in an
> easy-to-read form). On my machine (running cvs-head),
>
> test=# select now();
> now
> -------------------------------
> 2004-08-03 20:27:18.822646+09
> (1 row)
>
> which is definitely not seconds.milliseconds since epoch. You can use
> extract to get seconds.milliseconds from epoch, but I don't think this
> is how it's stored internally.
>
> test=# select extract(epoch from now());
> date_part
> -----------------
> 1091532506.3222
> (1 row)
>
> Just some additional trivia, current_timestamp is an SQL-spec compliant
> alias for now(), and might be a better choice if one is concerned with
> compatibility.
>
> Michael Glaesemann
> grzm myrealbox com
>
>
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>
--
-Achilleus
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To: pgsql-sql@postgresql.org
Cc: achill@matrix.gatewaynet.com, grzm@myrealbox.com, pedro.borracha@netcabo.pt
Subject: Re: Datetime
In-Reply-To: <Pine.LNX.4.44.0408031449340.7249-100000@matrix.gatewaynet.com>
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