js8544 commented on code in PR #36891:
URL: https://github.com/apache/arrow/pull/36891#discussion_r1308400955
##########
cpp/src/arrow/compute/kernels/scalar_nested.cc:
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@@ -819,6 +832,378 @@ const FunctionDoc map_lookup_doc{
"MapLookupOptions",
/*options_required=*/true};
+struct AdjoinAsListState : public KernelState {
+ explicit AdjoinAsListState(std::shared_ptr<DataType> list_type,
+ std::shared_ptr<DataType> input_type)
+ : list_type(std::move(list_type)), input_type(std::move(input_type)) {}
+
+ static Result<std::unique_ptr<KernelState>> Init(KernelContext* ctx,
+ const KernelInitArgs& args)
{
+ auto options = static_cast<const AdjoinAsListOptions*>(args.options);
+ if (!options) {
+ return Status::Invalid(
+ "Attempted to initialize KernelState from null FunctionOptions");
+ }
+
+ // Make sure input args have the same type
+ if (args.inputs.empty()) {
+ return Status::Invalid("AdjoinAsList requires at least one input
argument");
+ }
+
+ auto input_type = args.inputs[0];
+ if (std::any_of(args.inputs.begin() + 1, args.inputs.end(),
+ [&input_type](const auto& arg) { return arg != input_type;
})) {
+ return Status::Invalid(
Review Comment:
Done
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