Steampipe [1] is an open source [2] project that uses Postgres FDWs to query 67+ cloud services (e.g. AWS, GitHub, Prometheus). The plugins [3] are written in Go similar to Terraform. We've found this approach very effective for DevOps data and pushdown works well for most (simple) cases. (Disclaimer: I'm a lead on the project.)

1 - https://steampipe.io 2 - https://github.com/turbot/steampipe 3 - https://hub.steampipe.io/plugins