text: set client_min_messages to WARNING;
  
  \i ../load_topology.sql
  \i ../validate_topology.sql
  
  -- clean up
  SELECT topology.DropTopology('city_data');
  
  -- Test for #1612
  SELECT CreateTopology('tt') > 0;
  SELECT 'Empty topology errors', count(*) FROM ValidateTopology('tt');
  SELECT DropTopology('tt');
  