paleolimbot opened a new issue, #44791: URL: https://github.com/apache/arrow/issues/44791
### Describe the enhancement requested After #44714, the C++ implementation no longer drops field metadata (e.g., extension type information) from key or value items in the map type. We should add a test case to make sure other implementations can do this too! I think the scope of this is just an Archery test case (but could maybe also be an IPC file in arrow-testing?). (As suggested in https://github.com/apache/arrow/pull/44715#issuecomment-2483139498 ). ### Component(s) Integration -- 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: issues-unsubscr...@arrow.apache.org.apache.org For queries about this service, please contact Infrastructure at: us...@infra.apache.org