During July 2025, this developer enhanced the apache/doris repository by extending the Nereids SQL Parser to recognize the START TRANSACTION command as a no-op, ensuring compatibility with workflows referencing transactional statements. Using Groovy and Java, they implemented command handling logic that marks the command as unsupported while maintaining parser stability. To safeguard future development, they introduced regression tests that validate the no-op semantics, reinforcing the reliability of transaction-related features. Their work focused on SQL parsing and comprehensive testing, aligning with project standards and laying the groundwork for future transactional support in the Nereids engine without introducing regressions or instability.