Worked on improving stability and correctness in the MariaDB/server repository by addressing a critical bug in CHECKSUM TABLE operations. Focused on backend development using C++ and SQL, the work involved refining how persistent generated columns are handled during checksum workflows. By ensuring only non-stored virtual generated columns are excluded from the read set, the fix prevented assertion failures and illegal access to stored generated columns. The solution was delivered as a single, well-documented commit, enhancing the reliability of checksum operations and reducing the risk of crashes or data-access violations, with all changes traceable to the relevant issue for auditability.