At Cloudflare, we're working on expanding Workers (
https://www.cloudflare.com/products/cloudflare-workers/) to allow access to your existing DB servers & offer protection with Argo Tunnel (
https://www.cloudflare.com/products/argo-tunnel/). We are also enabling Workers to write into Cloudflare’s globally distributed cache, reducing retrieval time for repeated query results. We hope this will be a differentiator with using Cloudflare & highly valuable for your use cases.