Worked on the apache/shardingsphere repository to enhance SQL parsing for INSERT statements, specifically targeting compatibility between OpenGauss and PostgreSQL database dialects. Addressed a parsing issue by refining the handling of OnDuplicateKeyColumnsSegment, ensuring accurate recognition of duplicate key clauses in multi-dialect environments. The solution involved a targeted bug fix in Java, focusing on precise code changes to minimize regression risk. Additionally, improved code maintainability by standardizing setter and getter method names, which reduced potential parsing inconsistencies. Demonstrated attention to repository integrity and code quality, leveraging expertise in SQL parsing and database dialects to deliver a focused, high-impact improvement.