make sure invalid geometries are always deleted from place

This solves a bug with updating large invalid geometries. These
geometries have an entry in place but not in placex. Thus, place_insert
tries to delete the place entry and reinsert it on update. Deletion would
fail because self-intersecting polygons still have an area and large
areas are not deleted.

diff --git a/sql/functions.sql b/sql/functions.sql
index 20e97c1c87ec167fa3ce41da9595480ff964c3dd..03ea4011ddeec55f7ba388b43e40e6a75dc67125 100644 (file)
--- a/sql/functions.sql
+++ b/sql/functions.sql
@@ -1806,8 +1806,8 @@ BEGIN
 
   --DEBUG: RAISE WARNING 'delete: % % % %',OLD.osm_type,OLD.osm_id,OLD.class,OLD.type;
 
-  -- deleting large polygons can have a massive effect ont he system - require manual intervention to let them through
-  IF st_area(OLD.geometry) > 2 THEN
+  -- deleting large polygons can have a massive effect on the system - require manual intervention to let them through
+  IF st_area(OLD.geometry) > 2 and st_isvalid(OLD.geometry) THEN
     insert into import_polygon_delete values (OLD.osm_type,OLD.osm_id,OLD.class,OLD.type);
     RETURN NULL;
   END IF;