--- ibx/trunk/runtime/IBQuery.pas	2016/02/15 14:44:25	38
+++ ibx/trunk/runtime/IBQuery.pas	2016/05/17 08:14:52	39
@@ -509,7 +509,7 @@ end;
 
 procedure TIBQuery.UpdateSQL;
 begin
-  if not FSQLUpdating and not FInQueryChanged then
+  if not FSQLUpdating and not FInQueryChanged and (SQL.Text <> SelectSQL.Text) then
   begin
     FSQLUpdating := true;
     try