[Merad]

Unless you have some tricks up your sleeve that I'm not thinking of, an immediate consequence of this is that zero downtime deployments and blue/green deployments become impossible. Those both rely on your app being able to run in a state where the schema is not an exact match for what the app expects - but it's compatible so the app can still function.

[ComputerGuru]

Semantic versioning?

[Merad]

If I understand the GP correctly, there's no notion of semver involved. Any difference in the schema results in a runtime error.

[ComputerGuru]

Yes, that’s what I gathered from the code. But I was proposing it as an “easy” solution that doesn’t involve throwing away OP’s main idea.

[Filligree]

And that's okay. Most applications don't need zero-downtime deployments, and there are already plenty of APIs that support that use case. I'd rather have more like this one.