Merge pull request #3447 from lonvia/avoid-invalidating-large-features

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

diff --git a/lib-sql/functions/utils.sql b/lib-sql/functions/utils.sql
index b2771ba18eecf8db6276bf71a503cecbf7b29cb5..f8b365c582cce8cae569564bc9655335b8b69e1d 100644 (file)
--- a/lib-sql/functions/utils.sql
+++ b/lib-sql/functions/utils.sql
@@ -73,6 +73,26 @@ END;
 $$
 LANGUAGE plpgsql IMMUTABLE;
 
+
+CREATE OR REPLACE FUNCTION get_rel_node_members(members JSONB, memberLabels TEXT[])
+  RETURNS SETOF BIGINT
+  AS $$
+DECLARE
+  member JSONB;
+BEGIN
+  FOR member IN SELECT * FROM jsonb_array_elements(members)
+  LOOP
+    IF member->>'type' = 'N' and member->>'role' = ANY(memberLabels) THEN
+        RETURN NEXT (member->>'ref')::bigint;
+    END IF;
+  END LOOP;
+
+  RETURN;
+END;
+$$
+LANGUAGE plpgsql IMMUTABLE;
+
+
 -- Copy 'name' to or from the default language.
 --
 -- \param country_code     Country code of the object being named.
@@ -416,6 +436,20 @@ END;
 $$
 LANGUAGE plpgsql IMMUTABLE;
 
+CREATE OR REPLACE FUNCTION simplify_large_polygons(geometry GEOMETRY)
+  RETURNS GEOMETRY
+  AS $$
+BEGIN
+  IF ST_GeometryType(geometry) in ('ST_Polygon','ST_MultiPolygon')
+     and ST_MemSize(geometry) > 3000000
+  THEN
+    geometry := ST_SimplifyPreserveTopology(geometry, 0.0001);
+  END IF;
+  RETURN geometry;
+END;
+$$
+LANGUAGE plpgsql IMMUTABLE;
+
 
 CREATE OR REPLACE FUNCTION place_force_delete(placeid BIGINT)
   RETURNS BOOLEAN
@@ -487,3 +521,56 @@ BEGIN
 END;
 $$
 LANGUAGE plpgsql;
+
+CREATE OR REPLACE FUNCTION flush_deleted_places()
+  RETURNS INTEGER
+  AS $$
+BEGIN
+  -- deleting large polygons can have a massive effect on the system - require manual intervention to let them through
+  INSERT INTO import_polygon_delete (osm_type, osm_id, class, type)
+    SELECT osm_type, osm_id, class, type FROM place_to_be_deleted WHERE deferred;
+
+  -- delete from place table
+  ALTER TABLE place DISABLE TRIGGER place_before_delete;
+  DELETE FROM place USING place_to_be_deleted
+    WHERE place.osm_type = place_to_be_deleted.osm_type
+          and place.osm_id = place_to_be_deleted.osm_id
+          and place.class = place_to_be_deleted.class
+          and place.type = place_to_be_deleted.type
+          and not deferred;
+  ALTER TABLE place ENABLE TRIGGER place_before_delete;
+
+  -- Mark for delete in the placex table
+  UPDATE placex SET indexed_status = 100 FROM place_to_be_deleted
+    WHERE placex.osm_type = 'N' and place_to_be_deleted.osm_type = 'N'
+          and placex.osm_id = place_to_be_deleted.osm_id
+          and placex.class = place_to_be_deleted.class
+          and placex.type = place_to_be_deleted.type
+          and not deferred;
+  UPDATE placex SET indexed_status = 100 FROM place_to_be_deleted
+    WHERE placex.osm_type = 'W' and place_to_be_deleted.osm_type = 'W'
+          and placex.osm_id = place_to_be_deleted.osm_id
+          and placex.class = place_to_be_deleted.class
+          and placex.type = place_to_be_deleted.type
+          and not deferred;
+  UPDATE placex SET indexed_status = 100 FROM place_to_be_deleted
+    WHERE placex.osm_type = 'R' and place_to_be_deleted.osm_type = 'R'
+          and placex.osm_id = place_to_be_deleted.osm_id
+          and placex.class = place_to_be_deleted.class
+          and placex.type = place_to_be_deleted.type
+          and not deferred;
+
+   -- Mark for delete in interpolations
+   UPDATE location_property_osmline SET indexed_status = 100 FROM place_to_be_deleted
+    WHERE place_to_be_deleted.osm_type = 'W'
+          and place_to_be_deleted.class = 'place'
+          and place_to_be_deleted.type = 'houses'
+          and location_property_osmline.osm_id = place_to_be_deleted.osm_id
+          and not deferred;
+
+   -- Clear todo list.
+   TRUNCATE TABLE place_to_be_deleted;
+
+   RETURN NULL;
+END;
+$$ LANGUAGE plpgsql;