On placex_update we stop the indexing to the first parent if the rank_search is above 27. We should do the same check in get_adressdata, because place with a rank_address != 30 and a search_rank > 27 will have only 1 parent.
https://github.com/twain47/Nominatim/issues/534
IF for_place_id IS NULL THEN
select parent_place_id, calculated_country_code, housenumber, rank_search, postcode, name, class, type from placex
- WHERE place_id = in_place_id and rank_address = 30
+ WHERE place_id = in_place_id and rank_search > 27
INTO for_place_id, searchcountrycode, searchhousenumber, searchrankaddress, searchpostcode, searchhousename, searchclass, searchtype;
END IF;