xudong963 opened a new issue, #23374: URL: https://github.com/apache/datafusion/issues/23374
### Describe the bug `UnionExec::try_new` can panic while computing equivalence properties if stale constant metadata is carried across a projection and then rewritten to the union output schema. For example, a filter such as `ticker = 'ESU6'` can leave a uniform string constant in equivalence properties. If a parent projection drops `ticker`, union property schema rewriting can later see the remaining column slot as a timestamp column and attempt to cast `'ESU6'` to `Timestamp`, which fails during planning. The issue is in optimizer metadata handling: an unrepresentable constant after schema rewrite should be discarded rather than failing query planning. ### To Reproduce The reduced shape is: ```text UNION ALL over inputs with equivalence properties filter leaves a constant such as ticker = 'ESU6' parent projection drops ticker union equivalence properties are rewritten to the projected schema ``` ### Expected behavior Planning should not panic. Stale/unrepresentable equivalence constant metadata should be dropped during schema rewrite. ### Additional context The same path currently goes through `EquivalenceProperties::with_new_schema`, where the constant value is cast to the rewritten expression type, and `UnionExec::try_new`, which unwraps property computation. -- 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]
