text: INSERT INTO shoelace_log VALUES (
         shoelace_data.sl_name, 6,
         current_user, current_timestamp )
    FROM shoelace_data new, shoelace_data old,
         shoelace_data shoelace_data
   WHERE 6 <> shoelace_data.sl_avail
     AND shoelace_data.sl_name = 'sl7';
  