record iteration within SQL

I'm using the example at http://www.postgresql.org/idocs/index.php?plpgsql-

description.html under section "24.2.7.3. Iterating Through Records" as
the
basis for this code. I don't under stand why I get this error:

# select WatchListStagingProcess(1);
NOTICE: Error occurred while executing PL/pgSQL function
watchliststagingprocess
NOTICE: line 8 at SQL statement
ERROR: record stagingport has no field name

cheers.

CREATE FUNCTION WatchListStagingProcess(int4) RETURNS int4 AS '
DECLARE
WatchListID ALIAS for $1;

stagingport RECORD;

BEGIN
FOR stagingport IN SELECT * FROM watch_list_staging WHERE
watch_list_id = WatchListID LOOP
INSERT INTO watch_list_staging_results (watch_list_staging_id,
element_id)
SELECT stagingport.ID, element.id
FROM ports, element
WHERE element.name = stagingport.name
AND element.id = ports.element_id;
END LOOP;
END
' LANGUAGE 'plpgsql';
--
Dan Langille
The FreeBSD Diary - http://freebsddiary.org/ - practical examples