Unable to use '-' in column names in PLPGSQL

CREATE FUNCTION is_parent(INTEGER, INTEGER) RETURNS BOOLEAN AS '
DECLARE
parent ALIAS FOR $1;
tull ALIAS for $2;
kid INTEGER;
BEGIN
kid := tull;
LOOP
SELECT INTO kid "dir-id" FROM dir WHERE id = kid;
IF kid = parent THEN
RETURN TRUE;
END IF;
IF kid IS NULL THEN
RETURN FALSE;
END IF;
END LOOP;
END;
' LANGUAGE 'plpgsql';

Will cause the following compilation error:

NOTICE: plpgsql: ERROR during compile of is_parent near line 8
ERROR: unterminated "

If I change the column name to dir_id it works fine.

It does not matter whether or not I use quotes.

Aasmund Midttun Godal

aasmund(at)godal(dot)com - http://www.godal.com/
+47 40 45 20 46