refcursor

Hi!

I'm playing with refcursor, but I'm not successful. I defined follwing
function:

CREATE OR REPLACE FUNCTION stat() RETURNS refcursor AS '
DECLARE
    ref refcursor;
BEGIN
    OPEN ref FOR
        SELECT * FROM tagebuch;
    RETURN ref;
END;
' LANGUAGE 'plpgsql';

Trying to see some results gives me:

sport=# select stat();
ERROR:  fmgr_info: function 16556: cache lookup failed
sport=# select version();
                            version
---------------------------------------------------------------
 PostgreSQL 7.2.1 on i686-pc-linux-gnu, compiled by GCC 2.95.4
(1 row)
sport=# select * from tagebuch;
...

This works fine. I receive the same error when I try to call stat() from Python with pyPgSQL-DBI adaptor. What am I
doingwrong (PostgreSQL runs on a Debian/Woody box)? 

Regards,
Oliver

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