/**
  * returns current database
  * @return string 
  */
 public static function getCurrentDatabase()
 {
     $dbid = self::getCurrentDatabaseID();
     if ($dbid > 0) {
         $sql = "select * from `database` where `id`=" . $dbid;
         $pdo = ClsNaanalPDO::getNamedInstance();
         $pdo->setQuery($sql);
         $arrAssoc = $pdo->getAllAssoc();
         $database = $arrAssoc[0]["databasename"];
         $pdo->statement = null;
         return $database;
     } else {
         return ClsNaanalApplication::getDefaultDatabase();
     }
 }