anchor.diff:  
   %% == public ==
   
  --spec stat(integer()) -> string().
  +-spec stat(integer()|result()) -> string().
   stat(S)
     when is_integer(S) ->
       L = [
  
positive.code:          ?BCHECK(S,?SERVER_SESSION_STATE_CHANGED, "SERVER_SESSION_STATE_CHANGED")
          ],
      string:join([ E || E <- L, length(E) > 0 ], ",");
  stat(_) ->
      "?".
  
  
negative.code:          {?MYSQL_TYPE_GEOMETRY, "MYSQL_TYPE_GEOMETRY"}
          ],
      proplists:get_value(T, L, "unknown");
  type(#field{type=T}) ->
      type(T);
  type(_) ->
      "?".
  