code: public function convertToDatabaseValue($value, Doctrine\DBAL\Platforms\AbstractPlatform $platform)
      {
          if ($value !== null)
          {
              Zend_Debug::Dump(pack('H*', str_replace('-', '', $value)));
              return pack('H*', str_replace('-', '', $value));
              // return "0x" . str_replace('-', '', $value);
          }
      }
docs: {@inheritdoc}