pitrou commented on code in PR #12812:
URL: https://github.com/apache/arrow/pull/12812#discussion_r852244788
##########
cpp/src/arrow/record_batch.h:
##########
@@ -227,6 +227,11 @@ class ARROW_EXPORT RecordBatchReader {
/// \return Status
virtual Status ReadNext(std::shared_ptr<RecordBatch>* batch) = 0;
+ virtual Status ReadNext(std::shared_ptr<RecordBatch>* batch,
+ std::shared_ptr<KeyValueMetadata>* custom_metadata) {
+ return Status::NotImplemented("ReadNext with custom metadata");
+ }
Review Comment:
Perhaps something like:
```c++
struct RecordBatchWithMetadata {
std::shared_ptr<RecordBatch> batch;
std::shared_ptr<KeyValueMetadata> custom_metadata;
};
virtual Result<RecordBatchWithMetadata> ReadNext();
```
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