wiedld opened a new pull request, #12954: URL: https://github.com/apache/datafusion/pull/12954
## Which issue does this PR close? Part of #12733 ## Rationale for this change We found another bug for when the logical vs physical schema does not match. In this specific case, the UNION schema will [select which side has the nullable field -- and default to taking the left side](https://github.com/apache/datafusion/blob/5a0ea0bbad3de73ded192bf32080094cee5db9f3/datafusion/physical-plan/src/union.rs#L491). In the example case, we have the nullable field as the right side. With this setup, it became evident that we are not adding the field metadata from the left side => to the right side. ## What changes are included in this PR? [First commit](https://github.com/apache/datafusion/commit/a9b6bd56ed10ac23585d1010c923e5c457525274) is the reproducer. Second commit is the fix. Third commit updates the test/reproducer now that the fix is in. ## Are these changes tested? Yes. ## Are there any user-facing changes? No. -- 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] --------------------------------------------------------------------- To unsubscribe, e-mail: [email protected] For additional commands, e-mail: [email protected]
