--DEBUG: RAISE WARNING 'waterway parent %, child %/%', NEW.osm_id, i, relation_members[i];
FOR linked_node_id IN SELECT place_id FROM placex
WHERE osm_type = 'W' and osm_id = substring(relation_members[i],2,200)::bigint
--DEBUG: RAISE WARNING 'waterway parent %, child %/%', NEW.osm_id, i, relation_members[i];
FOR linked_node_id IN SELECT place_id FROM placex
WHERE osm_type = 'W' and osm_id = substring(relation_members[i],2,200)::bigint