jorisvandenbossche commented on PR #41763: URL: https://github.com/apache/arrow/pull/41763#issuecomment-2125103474
> I would note that https://arrow.apache.org/docs/format/Columnar.html#extension-types isn't very clear on whether the serialized metadata key-value is mandatory. In the C++ IPC reader, we seem to [consider it optional](https://github.com/apache/arrow/blob/f3d46398d3c81d9575ffd77ce3b86d4b993a4888/cpp/src/arrow/ipc/metadata_internal.cc#L878-L887). Yes, it would indeed be good to make that more explicit. A bit further down in that section it says "Extension types may or may not use the 'ARROW:extension:metadata' field." (but that can still be more explicit about being absent vs being empty, because then in the examples it mentions "empty metadata") -- This is an automated message from the Apache Git Service. To respond to the message, please log on to GitHub and use the URL above to go to the specific comment. To unsubscribe, e-mail: [email protected] For queries about this service, please contact Infrastructure at: [email protected]
