Andrey Klevtsov developed core UUID data-type support for the PostgreSQL JDBC catalog integration in the StarRocks repository, expanding compatibility with PostgreSQL sources. He implemented a mapping of PostgreSQL’s UUID type to a binary format within StarRocks, enabling seamless ingestion and querying of UUID fields through JDBC. The work included comprehensive test coverage in PostgresSchemaResolverTest to ensure end-to-end reliability of UUID handling. Using Java and leveraging backend development and database integration skills, Andrey’s contribution reduced the need for custom integration when working with UUID data, providing a robust solution for interoperability between StarRocks and PostgreSQL environments.