FUNCTION problem

HI everybody !

I have a problem, but I don't know the solution:

CREATE TABLE person(
  user_id SERIAL NOT NULL,
  uid CHARACTER(20) NOT NULL,
  pwd CHARACTER(20) NOT NULL,
  PRIMARY KEY (user_id)
  );

OK, That's right...

CREATE FUNCTION getuserid (CHARACTER(20),CHARACTER(20))
RETURNS SETOF INTEGER
AS
'
SELECT user_id FROM person WHERE uid=$1 AND pwd=$2;
'
LANGUAGE 'sql';

:-(

ERROR:  Unable to identify an operator '=$' for types 'character' and
'integer
You will have to retype this query using an explicit cast.

Please help me. I'm gona Crazy ...
I would like to write that function
with plain Sql / LANGUAGE 'sql' /.

CIAO

--
Sky
sky AT sylvio .hu
Debian Group - Association of Hungarian Linux Users
Accessibility Project leader
gpg --keyserver hkp://pgp.mit.edu --recv-keys 314D1B0C
fingerprint = B211 E8C7 C6C2 18B2 9F30  ADF6 EDD9 A7FA 314D 1B0C