Re: date - null casted to integer?

Ups, sorry, I'm idiot... changes from the default casting to text is
really helpful in clearing brain bugs...

Роман Маширов wrote:
> Hi!
>
> Excuse me, if this been discussed before, but following thing seems to
> me a little bit strange:
>
> select '2009-01-12'::date - null::date < '1 day'::interval;
> ERROR:  operator does not exist: integer < interval
> LINE 1: select '2009-11-12'::date - null::date < '1 day'::interval;
>                                               ^
> HINT:  No operator matches the given name and argument type(s). You
> might need to add explicit type casts.
>
> select ('2009-11-12'::date - null::date)::interval < '1 day'::interval;
> ERROR:  cannot cast type integer to interval
> LINE 1: select ('2009-11-12'::date - null::date)::interval < '1 day'...
>
> server 8.3.5 It's really not a problem in queries, but could became a
> real pain with plpgsql. I'm not sure, but it seems to me that any
> operation with null should product null from the standart's point of
> view?
>
> Thank you beforehand
> --
> MRJ
>
>
>