/**
* init cache connection
*
* @param ICache $cache
* @param AbstractDatabase $db
*/
public function __construct(ICache $cache, AbstractDatabase $db = null)
{
$this->relation = new \SplFixedArray();
$this->modelDataCache = [];
$this->tableData = new MySQLTableData($db);
$this->paramTransformer = new DynamicSQLParameter();
parent::__construct($cache, $db);
}