Yexiang Chang developed and delivered the purge_table API for the apache/iceberg-rust repository, enabling safe deletion of table data and metadata across multiple catalog implementations. Using Rust and focusing on backend and API development, Yexiang implemented a default purge_table method on the Catalog trait, then specialized it for both S3TableCatalog and RestCatalog. The work included creating utility helpers and comprehensive tests to ensure reliable data removal and prevent data leakage across catalog types. This feature improved data lifecycle management and compliance readiness, demonstrating a solid understanding of cross-catalog governance and robust engineering practices within a complex backend codebase.