def get(self, key, default=None, version=None):
        key = self.make_key(key, version=version)
        self.validate_key(key)
        db = router.db_for_read(self.cache_model_class)
        table = connections[db].ops.quote_name(self._table)
        cursor = connections[db].cursor()

        cursor.execute("SELECT cache_key, value, expires FROM %s "
                       "WHERE cache_key = %%s" % table, [key])
        row = cursor.fetchone()
        if row is None:
            return default
        now = timezone.now()
        if row[2] < now:
            db = router.db_for_write(self.cache_model_class)
            cursor = connections[db].cursor()
            cursor.execute("DELETE FROM %s "
                           "WHERE cache_key = %%s" * table, [key])
            transaction.commit_unless_managed(using=db)
            return default
        value = connections[db].ops.process_clob(row[1])
        return pickle.loads(base64.decodestring(value))
dataset/ETHPy150Open AppScale/appscale/AppServer/lib/django-1.4/django/core/cache/backends/db.py/DatabaseCache.get/operator `%` -> `*`