WHERE v is not null
GROUP BY id);
-select count(make_keywords(v)) from (select distinct address->'postcode' as v from place where address ? 'postcode') as w where v is not null;
+select count(getorcreate_postcode_id(v)) from (select distinct address->'postcode' as v from place where address ? 'postcode') as w where v is not null;
select count(getorcreate_housenumber_id(make_standard_name(v))) from (select distinct address->'housenumber' as v from place where address ? 'housenumber') as w;
-- copy the word frequencies