Describe the bug
Sometimes alias time does not work

To Reproduce

create table tst (
timestamp timestamp
)

select timestamp time from tst

Expected behavior
Result column name is timestamp but should be time

Screenshots

Environment (please complete the following information):

• Version: 6.0.2

Additional context
This is the workaround sy

I'm not sure whether this is a gnocchi problem or oslo_middleware.
We are using Gnocchi in an OpenStack setup (openstack-ansible with Pike) with redis as incoming storage. Recently we had the problem, that redis died and gnocchi didn't answer API requests. a request to metric status was answered by a HTTP 500. Our HAProxy in front of the gnocchi API is configured to query /healthcheck. But it d