tustvold commented on code in PR #2830:
URL: https://github.com/apache/arrow-rs/pull/2830#discussion_r989214673


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arrow/src/datatypes/native.rs:
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@@ -46,6 +46,7 @@ pub(crate) mod native_op {
         + Div<Output = Self>
         + Rem<Output = Self>
         + Zero
+        + num::ToPrimitive

Review Comment:
   Oh I see, could we possibly have the dyn_scalar kernels just have the 
constraint on `ToPrimitive + ArrowNativeTypeOp` instead of unifying them.
   
   This not only avoids this leaking to the arithmetic kernels, which will 
complicate porting decimals over, but it also seems wrong that the dyn kernels 
are performing type coercion on the scalar value at all, and I would very much 
like to remove this if possible.



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