I like the wildcard aspect, but I have a few issues with the patch:
* It doesn't respect some common abbreviations that work elsewhere (e.g. CREATE FUNCTION). So while "int4" works, "int" does not. Nor does "float", which thus requires the mandatory-double-quoted "double precision"
* Adding commas to the args, as returned by psql itself via \df, provides no matches.
* There seems to be no way (?) to limit the functions returned if they share a common root. The previous incantation allowed you to pull out foo(int) from foo(int, bigint). This was a big motivation for writing this patch.
* SQL error on \df foo a..b as well as one on \df foo (bigint bigint)
Cheers,
Greg
