[freetds] Out-of-the-box "date format" values for "default" and "en_US" locales

matthew.green at datamartcomputing.com matthew.green at datamartcomputing.com
Tue Apr 14 02:48:36 EDT 2015


The vendor (Sybase) default seems to be with a colon (http://infocenter.sybase.com/help/index.jsp?topic=/com.sybase.infocenter.dc38151.1520/html/iqrefbb/Convert.htm). 

select convert(char(40),getdate(),109);

 ----------------------------------------
 Apr 14 2015  8:42:03:660AM

Shouldn't we stick to that?

Cheers,

Matthew.

April 14 2015 8:40 AM, "Geoff Montee" <geoff.montee at gmail.com> wrote:
> Hi Frediano,
> 
> On Mon, Apr 13, 2015 at 8:39 AM, Frediano Ziglio <freddy77 at gmail.com> wrote:
> 
>> Il 09/Apr/2015 18:40, "Geoff Montee" <geoff.montee at gmail.com> ha scritto:
>>> In FreeTDS, the "default" and "en_US" locales have the following values of
>>> "date format" defined in locales.conf:
>>> 
>>> [default]
>>> date format = %b %e %Y %I:%M:%S:%z%p
>>> 
>>> [en_US]
>>> date format = %b %e %Y %I:%M:%S:%z%p
>>> language = us_english
>>> charset = iso_1
>>> 
>>> Is there a reason that FreeTDS chose to separate the seconds and
>>> milliseconds with a colon (':'), rather than a dot ('.')? A few users of
>>> tds_fdw recently ran into issues with this:
>>> 
>>> https://github.com/GeoffMontee/tds_fdw/issues/13
>>> 
>>> Because of the ISO 8601 standard, I think most applications expect a dot
>>> separator between seconds and milliseconds.
>>> 
>>> http://en.wikipedia.org/wiki/ISO_8601
>>> 
>>> These days, it may make sense to use ISO 8601 as the default "date
>> 
>> format",
>>> since it is pretty universal. If FreeTDS is going to have a new release
>>> soon, maybe it would be worth changing the default date format?
>> 
>> I don't remember the history but must be quite old.
>> 
>> Yes, default can change. As long is well documented I don't see the point
>> keeping the colon.
> 
> Thanks for the reply!
> 
> Changing the colon to a dot sounds good to me.
> 
> Would it be worth changing the default completely to an ISO
> 8601-compatible format? That would probably be something like:
> 
> [default]
> date format = %Y-%m-%dT%H:%M:%S.%z
> 
> The main difference between that and ISO-8601 is that it wouldn't
> contain the timezone offset. strftime uses %z for the timezone offset,
> but FreeTDS uses %z for the milliseconds.
> 
> Thanks,
> 
> Geoff
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