lidavidm commented on a change in pull request #11159:
URL: https://github.com/apache/arrow/pull/11159#discussion_r712382750
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File path: cpp/src/arrow/compute/kernels/scalar_nested.cc
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@@ -80,6 +80,134 @@ const FunctionDoc list_value_length_doc{
"Null values emit a null in the output."),
{"lists"}};
+template <typename Type, typename IndexType>
+Status ListElementArray(KernelContext* ctx, const ExecBatch& batch, Datum*
out) {
+ using ListArrayType = typename TypeTraits<Type>::ArrayType;
Review comment:
We're registering two separate kernels so there's no need to do dispatch
here. We could make the struct a function instead, though, for consistency.
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