benibus commented on code in PR #35798:
URL: https://github.com/apache/arrow/pull/35798#discussion_r1228396242
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cpp/src/arrow/dataset/file_parquet.cc:
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@@ -248,7 +283,12 @@ Result<std::vector<int>> InferColumnProjection(const
parquet::arrow::FileReader&
}
std::vector<int> columns_selection;
- for (const auto& ref : field_refs) {
+ for (auto& ref : field_refs) {
+ // In the (unlikely) absence of a known dataset schema, we require that all
+ // materialized refs are named.
+ if (options.dataset_schema) {
Review Comment:
Haha I figured as much... That being said, some of the existing tests do
leave it null.
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