onestardao commented on issue #17305: URL: https://github.com/apache/datafusion/issues/17305#issuecomment-3217633267
short answer: this looks like a schema coercion bug where the array coercion path is collapsing child element nullability, so the inferred coerced type no longer matches expected nested-list metadata and that triggers the assertion failures. maps to ProblemMap No 8 (Debugging is a Black Box). quick repro tips: add a trace/log right after the coercion step showing before/after schema (including nullability flags), and add a focused unit test that asserts child-element nullability is preserved through coercion. if you want the concise checklist and the exact patch/commands, reply with "link please" and i’ll paste them. -- 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: github-unsubscr...@datafusion.apache.org For queries about this service, please contact Infrastructure at: us...@infra.apache.org --------------------------------------------------------------------- To unsubscribe, e-mail: github-unsubscr...@datafusion.apache.org For additional commands, e-mail: github-h...@datafusion.apache.org
