On Thu, Feb 27, 2003 at 09:44:37PM -0500, Tom Lane wrote:
> Denis Zaitsev <zzz@cd-club.ru> writes:
> > So, I create some new scalar type and I don't declare its in/out
> > functions as STRICT. But PostgreSQL copes with them such as they
> > would be STRICT - they never get the NULL value.
>
> This is likely true in many places --- for example, COPY has a shortcut
> because it wants to substitute \N for nulls. It would not be a bright
> idea to assume that it's true in every place and forevermore. In
> general, if you have a C function and don't want to be bothered with
> explicit PG_ISNULL testing, you'd better mark it STRICT.
>
Ok, thanks.
