Super Graph can learn your DB schema and relationships and automatically compile GraphQL to a single efficient SQL query. Use it as a standalone service or a library in your own code. It also works with Rails auth, JWT, Firebase auth, supports OpenCensus tracking and tracing, designed to be high-performance and startup in few milliseconds fro scale to zero environments. It works with all kinds of DB relationships including polymorphic associations, JSON and Array columns, and much more.