def METHOD_NAME(self):
    """
    Create a link from host database location to image database
    location. The link is only created if both locations differ
    and if the host database location does not exist.
    """
    rpm_host_dbpath = self.rpmdb_host.expand_query('%_dbpath')
    rpm_image_dbpath = self.rpmdb_image.expand_query('%_dbpath')
    if rpm_host_dbpath != rpm_image_dbpath:
        root_rpm_host_dbpath = os.path.normpath(
            os.sep.join([self.root_dir, rpm_host_dbpath])
        )
        if not os.path.exists(root_rpm_host_dbpath):
            Path.create(os.path.dirname(root_rpm_host_dbpath))
            host_to_root = ''.join(
                '../' for i in os.path.dirname(
                    rpm_host_dbpath
                ).lstrip(os.sep).split(os.sep)
            )
            Command.run(
                [
                    'ln', '-s', os.path.normpath(
                        os.sep.join([host_to_root, rpm_image_dbpath])
                    ), root_rpm_host_dbpath
                ]
            )