February 2025: Focused on correctness and test coverage in xupefei/spark. Fixed AlterColumnSpec resolved status reporting by accounting for the newPosition field and added unit tests to validate behavior under various scenarios; this reduces risk of incorrect status in ALTER COLUMN operations and improves downstream reliability.

January 2025 – Delivered SQL: Batch Alter for Multiple Columns in xupefei/spark, introducing a single-command syntax for altering multiple columns with validation and backward compatibility. This reduces schema-change friction, improves migration consistency, and lowers risk in production. No major bugs fixed this month; focused on feature delivery with tests and documentation (SPARK-50883).

December 2024 monthly summary for xupefei/delta. Focused on delivering Spark-integrated Delta Lake features to improve data lifecycle operations, reliability, and performance. The work enhances compatibility with Spark catalogs, improves history integrity, and strengthens maintainability through refactoring and test hygiene.

November 2024 monthly summary for xupefei/delta: Focused on tightening Spark integration and streaming reliability through API-level metadata propagation and expanded test coverage. Key work included DeltaLog API enhancements to propagate comprehensive CatalogTable metadata through Delta Lake operations, and added unit tests for streaming coordinated commits to validate end-to-end interactions between Delta source and sink.