raulcd commented on PR #46261:
URL: https://github.com/apache/arrow/pull/46261#issuecomment-2875391493
> I wonder if this initiative enables free integration of third-party
compute functions/kernels? That is, users are able to register there own
compute functions/kernels from the application, without having to put them into
arrow-compute codebase (and recompiling)
This is something that can be done today just by leveraging the
`FunctionRegistry->AddFunction` functionality from an external codebase by
using the existing APIs:
```c++
// Define and register custom compute functions
auto func = std::make_shared<ScalarFunction>("custom_add",
Arity::Binary(),
/*doc=*/FunctionDoc::Empty());
// Add Int64 kernel
ScalarKernel kernel64;
// ExecAddInt64 function not shown for simplicity
kernel64.exec = ExecAddInt64;
kernel64.signature = KernelSignature::Make({int64(), int64()},
int64());
ARROW_RETURN_NOT_OK(func->AddKernel(kernel64));
// Add kernel implementation
ARROW_RETURN_NOT_OK(registry->AddFunction(std::move(func)));
```
The current PR won't change that behavior.
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