postgres=#
postgres=# CREATE FUNCTION "you_me" (integer) RETURNS integer AS '
postgres'# DECLARE
postgres'# RENAME $1 TO user_no;
postgres'# --you INTEGER := 5;
postgres'# BEGIN
postgres'# return user_no;
postgres'# END;' LANGUAGE 'plpgsql';
CREATE FUNCTION
postgres=#
postgres=# select you_me(1);
you_me
--------
1
(1 row)
postgres=#