<!--
Before reporting a bug:
If your database schema has changed while the PostgREST server is running,
send the server a SIGUSR1 signal or restart it(http://postgrest.org/en/stable/admin.html#schema-reloading)
to ensure the schema cache is not stale. This sometimes fixes apparent bugs.
-->
### Environment

* PostgreSQL version: (if using docker, specify the image)
* PostgREST version: (if using docker, specify the image)
* Operating system:

### Description of issue

(Expected behavior vs actual behavior)

(Steps to reproduce: Include a minimal SQL definition plus how you make the request to PostgREST and the response body)
