Re: BUG #2977: dow doesn't conform to ISO-8601

Am Mittwoch, 7. Februar 2007 11:24 schrieb Adriaan van Os:
> Section 9.9.1 of the Postgres docs
> <http://www.postgresql.org/docs/8.2/interactive/functions-datetime.html>
> mentions that the "week" subfield of the date_part function conforms to the
> ISO-8601 standard.

I see no such claim there.

> You can not, in the same function, ignore ISO-8601 for one subfield and
> follow it in another.

I think we have pretty well shown that we can.

> Besides, if in the same week Sunday comes before Monday, how can the result
> of the "week" and "dow" fields conform to each other ?

They don't.

> If "dow" can not be changed for reasons of backward compatibility, I
> suggest a new subfield "dayofweek" that does conform to the standard.

That might be reasonable. (Or maybe "isodow".)

--
Peter Eisentraut
http://developer.postgresql.org/~petere/