public function query(string $sql, array $params = []) {
        X::logger()->trace("$sql with params " . $this->serializeArray($params));
        try {
            $st = $this->pdo->prepare($sql);
            if ($st === false) {
                $e = $this->pdo->errorInfo();
                throw new DataBaseException($e[2], $e[1]);
            }
            if ($st->execute($params)) {
                $this->_affectedRows = $st->rowCount();
                $this->_lastInsertId = $this->pdo->lastInsertId();
                return $st->fetchAll(PDO::FETCH_ASSOC);
            }

            $e = $st->errorInfo();
            throw new DataBaseException($e[2], $e[1]);
        } catch (PDOException $ex) {
            X::logger()->trace($ex);
            throw new DataBaseException($ex->getMessage(), $ex->getCode());
        }
    }