Mayank Prasad contributed to the percona/percona-server repository by delivering a targeted bug fix that addressed incorrect column count checks in InnoDB’s INSTANT DDL operations. He corrected the logic in check_if_supported_inplace_alter to ensure the 1017 user column limit is properly enforced when adding or dropping columns, thereby preventing potential data corruption or assertion failures during online schema changes. Working primarily with C++ and SQL, Mayank applied his expertise in database internals, DDL operations, and testing to enhance the reliability and data integrity of rapid schema modifications, aligning the fix with release-readiness standards and providing concise regression coverage.