+CREATE OR REPLACE FUNCTION getorcreate_postcode_id(postcode TEXT)
+ RETURNS INTEGER
+ AS $$
+DECLARE
+ lookup_token TEXT;
+ lookup_word TEXT;
+ return_word_id INTEGER;
+BEGIN
+ lookup_word := upper(trim(postcode));
+ lookup_token := ' ' || make_standard_name(lookup_word);
+ SELECT min(word_id) FROM word WHERE word_token = lookup_token and class='place' and type='postcode' into return_word_id;
+ IF return_word_id IS NULL THEN
+ return_word_id := nextval('seq_word');
+ INSERT INTO word VALUES (return_word_id, lookup_token, lookup_word, 'place', 'postcode', null, 0);
+ END IF;
+ RETURN return_word_id;
+END;
+$$
+LANGUAGE plpgsql;
+