nbruno opened a new pull request #9088: URL: https://github.com/apache/arrow/pull/9088
Based on [this commit](https://github.com/apache/arrow/commit/c15a511ea19b7ed58e706ef6c8197fe9ed982a8b), it seems that the correct format for metadata serialization is `List<Map<String, String>>` since it was decided to deserialize it in this format. There are several ways to accomplish this, but this PR takes a less-impactful approach of defining the correct getter for Jackson to use. Other approaches could be more aggressive and propagate this change throughout the codebase, modifying the `Schema#getCustomMetadata` and `Field#getMetadata` method to return `List<Map<String, String>>`, but at that point it would probably make more sense to get rid of the notion of "converting" metadata entirely. ---------------------------------------------------------------- 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. For queries about this service, please contact Infrastructure at: us...@infra.apache.org
