niyue commented on code in PR #12812:
URL: https://github.com/apache/arrow/pull/12812#discussion_r851746729
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cpp/src/arrow/record_batch.h:
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@@ -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:
I add this new API with a default implementation so that existing sub class
of `RecordBatchReader` can still be compiled successfully.
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