/**
* set if the link should be with database (relevant for root-connection to external servers e.g. to create databases)
*
* @param boolean $linkWithoutDatabase default false means the dsn for the database link will contain a database name
*/
private static function _setLinkWithoutDatabase($linkWithoutDatabase = false)
{
self::$_linkWithoutDatabase = $linkWithoutDatabase;
self::$_link = null;
}
