Developed and integrated the map_filter function into the risingwavelabs/risingwave repository, enabling SQL queries to filter key-value pairs within map-valued data using lambda expressions. Focused on backend development and expression evaluation, the work involved extending the SQL expression system and ensuring robust handling of diverse map structures. Comprehensive test coverage was achieved through .slt.part files, validating the feature across multiple scenarios and ensuring reliability. The implementation, written in Rust and utilizing Protobuf, expanded the platform’s analytics capabilities by allowing more expressive queries on map data. No major bugs were addressed during this period, with efforts concentrated on feature delivery.