NickCrews commented on code in PR #43782:
URL: https://github.com/apache/arrow/pull/43782#discussion_r1943764878
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cpp/src/arrow/compute/kernels/scalar_cast_nested.cc:
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@@ -404,14 +400,20 @@ struct CastStruct {
int out_field_index = 0;
for (int field_index : fields_to_select) {
- const auto& target_type = out->type()->field(out_field_index++)->type();
+ const auto& target_field = out->type()->field(out_field_index++);
+ const auto& target_type = target_field->type();
if (field_index == kFillNullSentinel) {
ARROW_ASSIGN_OR_RAISE(auto nulls,
MakeArrayOfNull(target_type->GetSharedPtr(),
batch.length));
out_array->child_data.push_back(nulls->data());
} else {
const auto& values =
(in_array.child_data[field_index].ToArrayData()->Slice(
in_array.offset, in_array.length));
+ if (!target_field->nullable() && values->null_count > 0) {
Review Comment:
OK, I adjusted to `values->GetNullCount() > 0`, I think we all the issues
brought up here are resolved. re-open if I missed something.
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