During December 2024, Sergio focused on enhancing the stability and correctness of table creation in the githubnext/discovery-agent__apache__flink repository. He addressed a critical bug affecting CREATE TABLE AS operations involving METADATA and computed columns, ensuring that virtual metadata and computed columns no longer overwrite existing source columns. By refactoring the schema creation logic, Sergio improved the handling of both physical and metadata columns, reducing edge-case failures in Flink table planning. His work leveraged Java, SQL, and schema management skills to protect data integrity in downstream pipelines, demonstrating a deep understanding of DDL operations and the Flink Table API.