This repository is a proof-of-concept / experiment / demo of compiling a library using Apache DataFusion targeting WebAssembly.

There are two branches:

• wasm32-wasi which compiles and runs in wasmedge
• wasm32-unknown-unknown which compiles and runs in the browser

Navigate to those branches to see the demo code and readme with full details.

I got wasm32-wasi working first. See the readme in that branch for all the details. Then, I branched off to wasm32-unknown-unknown and got that working. See the difference between the two branches for which changes were required for wasm32-unknown-unknown.

Note: the wasm32-unknown-unknown branch is messier than the wasm32-wasi branch, and it's likely that all the patches it includes are not actually required to get compilation working.

Ultimately, these two branches could be cleaned up and submitted together as an upstream patch to datafusion.

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For more details, see my comment on the datafusion tracking issue for wasm support explaining the contents of this patch.