Обсуждение: Dates

On Wed, 2006-01-18 at 12:00, Bob Pawley wrote:
> Hi Folks
>
> I have a column for date which defaults to the ambigous 2005-1-1
> format.
>
> The documantation indicates how to change this to the unambigous Jan 1
> 2005, but the instructions aren't clear to me.

Actually, if the year comes first, it is not ambiguous.  It will always
be month-day if the year comes first.  It's the

mm/dd/yyyy or dd/mm/yyyy that is the issue.

Perhaps you have a solution??

Bob

----- Original Message -----
From: "Scott Marlowe" <smarlowe@g2switchworks.com>
To: "Bob Pawley" <rjpawley@shaw.ca>
Cc: "Postgresql" <pgsql-general@postgresql.org>
Sent: Wednesday, January 18, 2006 10:03 AM
Subject: Re: [GENERAL] Dates


> On Wed, 2006-01-18 at 12:00, Bob Pawley wrote:
>> Hi Folks
>>
>> I have a column for date which defaults to the ambigous 2005-1-1
>> format.
>>
>> The documantation indicates how to change this to the unambigous Jan 1
>> 2005, but the instructions aren't clear to me.
>
> Actually, if the year comes first, it is not ambiguous.  It will always
> be month-day if the year comes first.  It's the
>
> mm/dd/yyyy or dd/mm/yyyy that is the issue.
>
> ---------------------------(end of broadcast)---------------------------
> TIP 9: In versions below 8.0, the planner will ignore your desire to
>       choose an index scan if your joining column's datatypes do not
>       match

Oh yeah, right.  You want to set your datestyle.

See:

Changing it once:
http://www.postgresql.org/docs/8.1/static/datetime-appendix.html

Changing it for a database:
http://www.postgresql.org/docs/8.1/static/sql-alterdatabase.html

Changing it for everything that doesn't override it:
http://www.postgresql.org/docs/8.0/static/runtime-config.html

On Wed, 2006-01-18 at 12:17, Bob Pawley wrote:
> Perhaps you have a solution??
>
> Bob
>
> ----- Original Message -----
> From: "Scott Marlowe" <smarlowe@g2switchworks.com>
> To: "Bob Pawley" <rjpawley@shaw.ca>
> Cc: "Postgresql" <pgsql-general@postgresql.org>
> Sent: Wednesday, January 18, 2006 10:03 AM
> Subject: Re: [GENERAL] Dates
>
>
> > On Wed, 2006-01-18 at 12:00, Bob Pawley wrote:
> >> Hi Folks
> >>
> >> I have a column for date which defaults to the ambigous 2005-1-1
> >> format.
> >>
> >> The documantation indicates how to change this to the unambigous Jan 1
> >> 2005, but the instructions aren't clear to me.
> >
> > Actually, if the year comes first, it is not ambiguous.  It will always
> > be month-day if the year comes first.  It's the
> >
> > mm/dd/yyyy or dd/mm/yyyy that is the issue.
> >
> > ---------------------------(end of broadcast)---------------------------
> > TIP 9: In versions below 8.0, the planner will ignore your desire to
> >       choose an index scan if your joining column's datatypes do not
> >       match
>
> ---------------------------(end of broadcast)---------------------------
> TIP 1: if posting/reading through Usenet, please send an appropriate
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