SQLGlobal::sql PHP Метод

    private function sql()
    {
        $sql =& $this->_sql;
        if (count($sql) == 0) {
            $sql = array("{$this->method}");
            $callableMethod = 'build' . ucfirst($this->method);
            $this->{$callableMethod}();
        }
        //logs(implode(' ', $sql) . "\r\n");
        return implode(' ', $sql);
    }