inherit tags from interpolation not parent

Nodes on an interpolation now only get the address tags of
interpolations and then compute their own parent from that. They no
longer inherit the parent directly.

lib-sql/functions/placex_triggers.sql

@@ -29,9 +29,9 @@ DECLARE
 BEGIN
   -- For POI nodes, check if the address should be derived from a surrounding
   -- building.
-  IF p.rank_search < 30 OR p.osm_type != 'N' OR p.address is not null THEN
+  IF p.rank_search < 30 OR p.osm_type != 'N' THEN
     result.address := p.address;
-  ELSE
+  ELSEIF p.address is null THEN
     -- The additional && condition works around the misguided query
     -- planner of postgis 3.0.
     SELECT placex.address || hstore('_inherited', '') INTO result.address
@@ -42,6 +42,20 @@ BEGIN
            and (placex.address ? 'housenumber' or placex.address ? 'street' or placex.address ? 'place')
            and rank_search = 30 AND ST_GeometryType(geometry) in ('ST_Polygon','ST_MultiPolygon')
      LIMIT 1;
+  ELSE
+    result.address := p.address;
+    -- See if we can inherit addtional address tags from an interpolation.
+    -- These will become permanent.
+    FOR location IN
+      SELECT (address - 'interpolation'::text - 'housenumber'::text) as address
+        FROM place, planet_osm_ways w
+        WHERE place.osm_type = 'W' and place.address ? 'interpolation'
+              and place.geometry && p.geometry
+              and place.osm_id = w.id
+              and p.osm_id = any(w.nodes)
+    LOOP
+      result.address := location.address || result.address;
+    END LOOP;
   END IF;
 
   result.address := result.address - '_unlisted_place'::TEXT;
@@ -131,17 +145,6 @@ BEGIN
   END IF;
 
   IF parent_place_id is null and poi_osm_type = 'N' THEN
-    -- Is this node part of an interpolation?
-    FOR location IN
-      SELECT q.parent_place_id
-        FROM location_property_osmline q, planet_osm_ways x
-       WHERE q.linegeo && bbox and startnumber is not null
-             and x.id = q.osm_id and poi_osm_id = any(x.nodes)
-    LOOP
-      {% if debug %}RAISE WARNING 'Get parent from interpolation: %', location.parent_place_id;{% endif %}
-      RETURN location.parent_place_id;
-    END LOOP;
-
     FOR location IN
       SELECT p.place_id, p.osm_id, p.rank_search, p.address,
              coalesce(p.centroid, ST_Centroid(p.geometry)) as centroid