westonpace opened a new issue, #36792:
URL: https://github.com/apache/arrow/issues/36792
### Describe the bug, including details regarding any error messages,
version, and platform.
Currently field names are figured out using this method:
```
void ToProtoGetDepthFirstNames(const FieldVector& fields,
google::protobuf::RepeatedPtrField<std::string>* names) {
for (const auto& field : fields) {
*names->Add() = field->name();
if (field->type()->id() == Type::STRUCT) {
ToProtoGetDepthFirstNames(field->type()->fields(), names);
}
}
}
```
If there is a list / large list / map (dictionary? extension?) that has
children then their names will not be included in the result.
For example, given the schema:
```
auto schema = arrow::schema(
{arrow::field("preceding_field", arrow::int32()),
arrow::field("points",
arrow::list(arrow::field(
"point", arrow::struct_(
{arrow::field("x", arrow::float64()),
arrow::field("y",
arrow::float64())})))),
arrow::field("trailing_field", arrow::int32())});
```
I would expect the names to be `["preceding_field", "points", "x", "y",
"trailing_field"]` but I only get `["preceding_field", "points",
"trailing_field"]`.
### Component(s)
C++
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