Hi Dominik,
I see you opened several items regarding MySQL-compatible functions. I don’t have time to answer all these right now. If you have a lot of code and don’t want to change your SQL, your best bet would be to implement all these functions in MPSQL or Wasm (if they are scalar functions). E.g. in Wasm you could import a compression library in Rust and probably write compress/uncompress in a few lines of code.
Eric