### Describe the bug https://github.com/apache/datafusion/pull/14538 introduced `UNION [ALL] BY NAME`. A few of the tests in the `union_by_name.slt` currently fail due to the sanity checker ([here](https://github.com/apache/datafusion/blob/main/datafusion/sqllogictest/test_files/union_by_name.slt#L161) for example). Investigate and fix these failing tests. ### To Reproduce _No response_ ### Expected behavior _No response_ ### Additional context _No response_
