Worked on the prestodb/presto repository to enhance observability for materialized view rewrites in Presto. Developed a feature that exposes the rewritten SQL generated by materialized view acceleration, making it accessible through the QueryInfo structure and related SPIs without altering query planning or execution. Leveraged Java and SQL to implement a new field, materializedViewRewrittenQuery, and updated event listeners to support improved debugging and auditing. Comprehensive tests were added to cover various rewrite scenarios, ensuring reliability and clarity between original and rewritten queries. Maintained CI compatibility and documented SPI changes, demonstrating a methodical approach to backend development and query optimization.