From: | Stephan Szabo <sszabo(at)megazone(dot)bigpanda(dot)com> |
---|---|
To: | Tom Lane <tgl(at)sss(dot)pgh(dot)pa(dot)us> |
Cc: | Clodoaldo Pinto <clodoaldo(dot)pinto(at)gmail(dot)com>, Bruce Momjian <pgman(at)candle(dot)pha(dot)pa(dot)us>, "pgsql-general postgresql(dot)org" <pgsql-general(at)postgresql(dot)org> |
Subject: | Re: extract (dow/week from date) |
Date: | 2005-08-21 03:49:27 |
Message-ID: | 20050820203322.O34872@megazone.bigpanda.com |
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Lists: | pgsql-general |
On Sat, 20 Aug 2005, Tom Lane wrote:
> Clodoaldo Pinto <clodoaldo(dot)pinto(at)gmail(dot)com> writes:
> > I'm ordering by date just to show that sunday, the 0th day of the
> > week, is the last day of a given week, which is not what I need.
>
> extract(week) follows the ISO definition of week, which is pretty
> strange anyway, but in particular it says that weeks start on Monday.
> extract(dow) follows a different convention. There's not a lot we
> can do about this --- we're certainly not going to change extract(week),
> and I can't see changing extract(dow) either.
Instead of change the existing ones, couldn't we add a new extract format
for "iso day of week" that returns 1-7 for monday-sunday that would be
consistent with the week definition?
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