Bug #668: cursors with params: mismatched parentheses;

Eduardo Rambo (rambo(at)portoweb(dot)com(dot)br) reports a bug with a severity of 3
The lower the number the more severe it is.

Short Description
cursors with params: mismatched parentheses;

Long Description
cursors with parameters do not seems to work. Is that implemented?

I tried many differents ways and get the same result:

mismatched parentheses,

no matter what table or data type the cursor is based on.

I have a linux conectiva 5 (derrived of Red Hat 7.0), and
Postgres 7.2.1.

Sample Code
create table tab_teste (codigo int primary key ,campo varchar(100));

CREATE or replace FUNCTION fteste(int)
RETURNS numeric
AS '
DECLARE
curs3 CURSOR (key int) IS SELECT * from tab_teste where codigo = key;
reg tab_teste%ROWTYPE;
BEGIN

OPEN curs3(1);
FETCH curs3 INTO reg;
CLOSE curs3;
RETURN 0;
END;'
LANGUAGE 'plpgsql';

select fteste(11);

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