simplify very large polygons non used in addresses

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

diff --git a/lib-sql/functions/placex_triggers.sql b/lib-sql/functions/placex_triggers.sql
index a8fb9fcc2cf02d3b54541065b280fa6e0d5a7852..99eebe1267acd86326db972deab6802622caadaa 100644 (file)
--- a/lib-sql/functions/placex_triggers.sql
+++ b/lib-sql/functions/placex_triggers.sql
@@ -2,7 +2,7 @@
 --
 -- This file is part of Nominatim. (https://nominatim.org)
 --
--- Copyright (C) 2022 by the Nominatim developer community.
+-- Copyright (C) 2024 by the Nominatim developer community.
 -- For a full list of authors see the git log.
 
 -- Trigger functions for the placex table.
@@ -88,12 +88,18 @@ BEGIN
       -- Add all names from the place nodes that deviate from the name
       -- in the relation with the prefix '_place_'. Deviation means that
       -- either the value is different or a given key is missing completely
-      SELECT hstore(array_agg('_place_' || key), array_agg(value)) INTO extra_names
-        FROM each(location.name - result.name);
-      {% if debug %}RAISE WARNING 'Extra names: %', extra_names;{% endif %}
+      IF result.name is null THEN
+        SELECT hstore(array_agg('_place_' || key), array_agg(value))
+          INTO result.name
+          FROM each(location.name);
+      ELSE
+        SELECT hstore(array_agg('_place_' || key), array_agg(value)) INTO extra_names
+          FROM each(location.name - result.name);
+        {% if debug %}RAISE WARNING 'Extra names: %', extra_names;{% endif %}
 
-      IF extra_names is not null THEN
-          result.name := result.name || extra_names;
+        IF extra_names is not null THEN
+            result.name := result.name || extra_names;
+        END IF;
       END IF;
 
       {% if debug %}RAISE WARNING 'Final names: %', result.name;{% endif %}
@@ -672,6 +678,12 @@ BEGIN
       NEW.country_code := NULL;
     END IF;
 
+    -- Simplify polygons with a very large memory footprint when they
+    -- do not take part in address computation.
+    IF NEW.rank_address = 0 THEN
+      NEW.geometry := simplify_large_polygons(NEW.geometry);
+    END IF;
+
   END IF;
 
   {% if debug %}RAISE WARNING 'placex_insert:END: % % % %',NEW.osm_type,NEW.osm_id,NEW.class,NEW.type;{% endif %}
@@ -788,6 +800,9 @@ BEGIN
   result := deleteLocationArea(NEW.partition, NEW.place_id, NEW.rank_search);
 
   NEW.extratags := NEW.extratags - 'linked_place'::TEXT;
+  IF NEW.extratags = ''::hstore THEN
+    NEW.extratags := NULL;
+  END IF;
 
   -- NEW.linked_place_id contains the precomputed linkee. Save this and restore
   -- the previous link status.
@@ -996,7 +1011,7 @@ BEGIN
 
     {% if debug %}RAISE WARNING 'finding street for % %', NEW.osm_type, NEW.osm_id;{% endif %}
     NEW.parent_place_id := null;
-    is_place_address := coalesce(not NEW.address ? 'street' and NEW.address ? 'place', FALSE);
+    is_place_address := not token_is_street_address(NEW.token_info);
 
     -- We have to find our parent road.
     NEW.parent_place_id := find_parent_for_poi(NEW.osm_type, NEW.osm_id,
@@ -1013,7 +1028,7 @@ BEGIN
       SELECT p.country_code, p.postcode, p.name FROM placex p
        WHERE p.place_id = NEW.parent_place_id INTO location;
 
-      IF is_place_address THEN
+      IF is_place_address and NEW.address ? 'place' THEN
         -- Check if the addr:place tag is part of the parent name
         SELECT count(*) INTO i
           FROM svals(location.name) AS pname WHERE pname = NEW.address->'place';
@@ -1120,7 +1135,7 @@ BEGIN
   ELSE
     -- No linked place? As a last resort check if the boundary is tagged with
     -- a place type and adapt the rank address.
-    IF NEW.rank_address > 0 and NEW.extratags ? 'place' THEN
+    IF NEW.rank_address between 4 and 25 and NEW.extratags ? 'place' THEN
       SELECT address_rank INTO place_address_level
         FROM compute_place_rank(NEW.country_code, 'A', 'place',
                                 NEW.extratags->'place', 0::SMALLINT, False, null);
@@ -1230,8 +1245,14 @@ BEGIN
     {% endif %}
   END IF;
 
-  IF NEW.postcode is null AND NEW.rank_search > 8 THEN
-    NEW.postcode := get_nearest_postcode(NEW.country_code, NEW.geometry);
+  IF NEW.postcode is null AND NEW.rank_search > 8
+     AND (NEW.rank_address > 0
+          OR ST_GeometryType(NEW.geometry) not in ('ST_LineString','ST_MultiLineString')
+          OR ST_Length(NEW.geometry) < 0.02)
+  THEN
+    NEW.postcode := get_nearest_postcode(NEW.country_code,
+                                         CASE WHEN NEW.rank_address > 25
+                                              THEN NEW.centroid ELSE NEW.geometry END);
   END IF;
 
   {% if debug %}RAISE WARNING 'place update % % finished.', NEW.osm_type, NEW.osm_id;{% endif %}