Yeah that and the actual core storage engine is a key-value store library called https://github.com/tikv/tikv https://github.com/tikv/tikv which is written in R

Yeah that and the actual core storage engine is a key-value store library called https://github.com/tikv/tikv https://github.com/tikv/tikv which is written in Rust. I suspect the Go part only handles the replication component, MVCC, query planner, server etc.