been working on a mechanism for (de)serializing custom function exprs so we don't need them all as another variant of

FunctionExpr

the serialization part was easy enough via

erased_serde

but deserialization is a bit more involved, but not terrible. I refactored the newer

minhash

function using this new method just to try things out. Still need to build out the registry, but overall it's looking promising https://github.com/Eventual-Inc/Daft/compare/main...universalmind303:Daft:dyn-funcs?expand=1