WASM extension

[maelp]

Very nice work, would it be possible to create a WASM extension to use it in duckdb-wasm?

[ywelsch]

I had experimented with this a couple of weeks ago, but ran into trouble compiling the code with emscripten. The PRQL compiler that I'm embedding in this DuckDB C++ extension is written in Rust, and the WASM compilation toolchain was running into linker issues when (statically) linking some Rust libraries.

I will give it another look, as I agree that this would be a great feature to have.

[max-sixty]

(@ywelsch if there's anything we can do to make this easier on the PRQL side, let us know!)

[eitsupi]

FYI, prqlc-r supports be compiled to the emscripten target with like this:
https://github.com/PRQL/prqlc-r/blob/0c162fe3a30de791a44c110514f7d83f5c91a9d3/src/Makevars.in#L35-L44

However, it cannot be built with the recent nightly toolchain due to an outdated dependency crate (PRQL/prqlc-r#261).