Worked on stabilizing the apache/datafusion core by improving session handling within the ListingTableFactory component. Addressed a potential panic scenario by replacing the use of unwrap() with ok_or_else(), ensuring that when a session is not a SessionState, the system returns a DataFusionError::Internal instead of crashing. Added a targeted regression test using MockSession to verify the new error path and prevent future regressions. All changes were validated with comprehensive unit tests using Rust, focusing on backend development best practices. This work enhanced error handling, increased reliability for custom session implementations, and reinforced maintainability without introducing user-facing changes.