Tom Lane wrote:
> 1. There is no provision for a single pg_proc entry to have a variable
> number of arguments.
>
> 2. You can make multiple pg_proc entries referencing the same C
> function. The C function can find out how many arguments it was
> actually passed (use PG_NARGS()).
>
> So you could make several different pg_proc entries and get the desired
> effect, at some tedium.
>
> Joe Conway has posted a few examples using this approach, IIRC.
>
See contrib/dblink in 7.4beta -- there are several functions using this
method, e.g. dblink_connect().
Joe
