Fokko opened a new issue, #37219: URL: https://github.com/apache/arrow/issues/37219
### Describe the bug, including details regarding any error messages, version, and platform. Given the following Parquet file: ``` ➜ arrow git:(arrow-14705) ✗ parquet-tools inspect ~/Desktop/int.parquet ############ file meta data ############ created_by: parquet-cpp-arrow version 12.0.0 num_columns: 1 num_rows: 3 num_row_groups: 1 format_version: 2.6 serialized_size: 798 ############ Columns ############ id ############ Column(id) ############ name: id path: id max_definition_level: 0 max_repetition_level: 0 physical_type: INT32 logical_type: None converted_type (legacy): NONE compression: SNAPPY (space_saved: -5%) ``` When I widen a type, I see that the not-null is dropped from the schema:  I think this should be maintained. ### Component(s) Python -- 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]
