Fixed #5552 -- Raise an error, rather than failing silently, when DATABASE_NAME

    def _cursor(self, settings):

        if self.connection is None:

            if not settings.DATABASE_NAME:

                from django.core.exceptions import ImproperlyConfigured

                raise ImproperlyConfigured, "Please fill out DATABASE_NAME in the settings module before using the database."

            kwargs = {

                'database': settings.DATABASE_NAME,

                'detect_types': Database.PARSE_DECLTYPES | Database.PARSE_COLNAMES,