Merge pull request #2887 from lonvia/lookup-linked-places

[nominatim.git] / lib-sql / functions / interpolation.sql

diff --git a/lib-sql/functions/interpolation.sql b/lib-sql/functions/interpolation.sql
index c8cfbcc68c53dece2e3f84ea40c12f99dc77da86..fb822033c0220b400524a341515670d58b137be4 100644 (file)
--- a/lib-sql/functions/interpolation.sql
+++ b/lib-sql/functions/interpolation.sql
@@ -15,7 +15,7 @@ DECLARE
   location RECORD;
   waynodes BIGINT[];
 BEGIN
-  IF akeys(in_address) != ARRAY['interpolation'] THEN
+  IF in_address ? 'street' or in_address ? 'place' THEN
     RETURN in_address;
   END IF;
 
@@ -52,7 +52,9 @@ BEGIN
 
   IF parent_place_id is null THEN
     FOR location IN SELECT place_id FROM placex
-        WHERE ST_DWithin(geom, placex.geometry, 0.001) and placex.rank_search = 26
+        WHERE ST_DWithin(geom, placex.geometry, 0.001)
+              and placex.rank_search = 26
+              and placex.osm_type = 'W' -- needed for index selection
         ORDER BY CASE WHEN ST_GeometryType(geom) = 'ST_Line' THEN
                   (ST_distance(placex.geometry, ST_LineInterpolatePoint(geom,0))+
                   ST_distance(placex.geometry, ST_LineInterpolatePoint(geom,0.5))+
@@ -156,7 +158,6 @@ DECLARE
   linegeo GEOMETRY;
   splitline GEOMETRY;
   sectiongeo GEOMETRY;
-  interpol_postcode TEXT;
   postcode TEXT;
   stepmod SMALLINT;
 BEGIN
@@ -174,8 +175,6 @@ BEGIN
                                                  ST_PointOnSurface(NEW.linegeo),
                                                  NEW.linegeo);
 
-  interpol_postcode := token_normalized_postcode(NEW.address->'postcode');
-
   NEW.token_info := token_strip_info(NEW.token_info);
   IF NEW.address ? '_inherited' THEN
     NEW.address := hstore('interpolation', NEW.address->'interpolation');
@@ -207,6 +206,11 @@ BEGIN
     FOR nextnode IN
       SELECT DISTINCT ON (nodeidpos)
           osm_id, address, geometry,
+          -- Take the postcode from the node only if it has a housenumber itself.
+          -- Note that there is a corner-case where the node has a wrongly
+          -- formatted postcode and therefore 'postcode' contains a derived
+          -- variant.
+          CASE WHEN address ? 'postcode' THEN placex.postcode ELSE NULL::text END as postcode,
           substring(address->'housenumber','[0-9]+')::integer as hnr
         FROM placex, generate_series(1, array_upper(waynodes, 1)) nodeidpos
         WHERE osm_type = 'N' and osm_id = waynodes[nodeidpos]::BIGINT
@@ -260,13 +264,10 @@ BEGIN
         endnumber := newend;
 
         -- determine postcode
-        postcode := coalesce(interpol_postcode,
-                             token_normalized_postcode(prevnode.address->'postcode'),
-                             token_normalized_postcode(nextnode.address->'postcode'),
-                             postcode);
-        IF postcode is NULL THEN
-            SELECT token_normalized_postcode(placex.postcode)
-              FROM placex WHERE place_id = NEW.parent_place_id INTO postcode;
+        postcode := coalesce(prevnode.postcode, nextnode.postcode, postcode);
+        IF postcode is NULL and NEW.parent_place_id > 0 THEN
+            SELECT placex.postcode FROM placex
+              WHERE place_id = NEW.parent_place_id INTO postcode;
         END IF;
         IF postcode is NULL THEN
             postcode := get_nearest_postcode(NEW.country_code, nextnode.geometry);