vibhatha commented on code in PR #13397:
URL: https://github.com/apache/arrow/pull/13397#discussion_r927246696


##########
r/src/compute.cpp:
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@@ -574,3 +576,118 @@ SEXP compute__CallFunction(std::string func_name, 
cpp11::list args, cpp11::list
 std::vector<std::string> compute__GetFunctionNames() {
   return arrow::compute::GetFunctionRegistry()->GetFunctionNames();
 }
+
+class RScalarUDFCallable : public arrow::compute::ArrayKernelExec {

Review Comment:
   @westonpace I think we haven't adopted the `KernelState` in the Python UDFs. 
But we only have a separate callable like the updated PR contains. I guess, the 
`KernelState` integration is we need to adopt. Please correct me if I 
misinterpretted this conversation. 



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