Worked on the drizzle-team/drizzle-orm repository, focusing on backend development and database reliability. Addressed a critical issue in the MySQL dialect’s $returningId() implementation, ensuring that selected fields are correctly stored and returned regardless of primary key column order. Utilized TypeScript and SQL to deliver a targeted bug fix, improving the integrity of insert operations and the consistency of returned data for downstream consumers. Developed and integrated automated tests to verify the solution and prevent future regressions. The work emphasized robust ORM logic and thorough testing practices, contributing to more reliable data handling within the drizzle-orm MySQL dialect.