During December 2025, Serhii Pustovykh developed advanced SQL INNER JOIN support for the FoundationDB/fdb-record-layer repository. He enhanced the system’s query capabilities by enabling multi-table joins through standard SQL syntax, allowing for more complex data retrieval across related tables. His work involved updating the logical plan and planner visitor to correctly parse and optimize inner join expressions, ensuring compatibility with existing features and stable performance. Utilizing Java, SQL, and database management expertise, Serhii’s contribution reduced the need for client-side data stitching and minimized round-trips, resulting in more efficient reporting and streamlined access to related data within a single query.