private function processValue($value)
    {
        if ($value === "NOW()") {
            return $this->connection()->quote(gmdate("Y-m-d H:i:s"));
        } elseif ($value === "NULL") {
            return 'NULL';
        } elseif (is_array($value)) {
            return $this->connection()->quote(json_encode($value));
        } else {
            return $this->connection()->quote($value);
        }
    }