public function execute($sql, array $parameters = array())
    {
        $this->logger->info($sql, array('parameters' => $parameters));

        try {
            $statement = $this->getPdo()->prepare($sql);
            $statement->execute($parameters);
        } catch (PDOException $exception) {
            $this->logger->error($exception->getMessage());

            throw $exception;
        }

        return $statement;
    }