PQConnection1.Close; //just in case.. se crasha :D
  PQConnection1.UserName:=user;
  PQConnection1.Password:=password;
//  SQLTransaction1.DataBase:=SQLite3Connection1;
//  SQLQuery1.Database:=SQLite3Connection1;
  try
    PQConnection1.Open;
    PQConnection1.ExecuteDirect('set search_path to cartografia');
  except
       on Exception do
       begin
            MessageDlg('Errore nella connessione al DB',mtError, mbOKCancel, 0);
       end;
//  SQLite3Connection1.Open;
//  Sqlquery1.SQL.Clear;
  end;