Parser does not like %ROWTYPE in the RETURNS clause of a function declaration (BUG?)

Aother head banger for me.

Below is a complete example of the code

Using Postgres 7.4,
the function "test" gets this: psql:temp3.sql:10: ERROR: syntax error
at or near "%" at character 135
the function "test2" gets this: psql:temp3.sql:10: ERROR: syntax error
at or near "ROWTYPE" at character 141

Very odd. The first doesn't even like the '%' character -- perhaps because
doof is a table type rather than a column (domain) type???

And when we schema qualify the name of the table then the % is ok, but
ROWTYPE is not.

Is this a well-known limitation or a new (7.4) bug? I tried combing the
docs to no avail.

Thanks,

Ezra E.

<code>
/*
CREATE TABLE doof ( "pk_id" serial )
WITHOUT OIDS;
*/

CREATE OR REPLACE FUNCTION test(INTEGER)
RETURNS doof%ROWTYPE AS '
SELECT * FROM doof WHERE pk_id=$1;
' LANGUAGE SQL STABLE RETURNS NULL ON NULL INPUT;

CREATE OR REPLACE FUNCTION test2(INTEGER)
RETURNS public.doof%ROWTYPE AS '
SELECT * FROM doof WHERE pk_id=$1;
' LANGUAGE SQL STABLE RETURNS NULL ON NULL INPUT;
</code>