Certainly complicated! This is one of those places where I don't think Postgres compatibility is achievable or even desirable, schema changes in a distributed d

Certainly complicated! This is one of those places where I don't think Postgres compatibility is achievable or even desirable, schema changes in a distributed databases are a whole different beast (and very complicated in large Postgres deployments as well). It will probably end up being something similar to online schema changes in Cockroach where the changes that can be made are limited for safety and run as a background job that can be tracked: https://www.cockroachlabs.com/docs/stable/online-schema-changes https://www.cockroachlabs.com/docs/stable/online-schema-chan... I've got a bit of experience with schema changes from building Reshape: https://github.com/fabianlindfors/reshape https://github.com/fabianlindfors/reshape. I'm hoping to transfer over some concepts from there into pgfdb eventually!