Month: 2024-11 — Concise monthly summary focusing on delivering PostgreSQL-style string splitting across two repositories, with strong test coverage and cross-project alignment. Key features delivered: - apache/calcite: Implemented PostgreSQL SPLIT_PART in Java, registered as a SQL operator, with comprehensive unit tests covering standard and edge cases (including negative indexing). Commit: a83f2f81f9275d670e7df86a525aef613af72366. - feldera/feldera: Added split_part function for PostgreSQL-style string manipulation in the SQL dialect, with positive/negative indexing and extensive tests. Commit: 9fa61c649ca7454465fb71275554dfc8cc537243. Major bugs fixed: - No explicit bugs reported this month. Efforts focused on feature parity and test coverage to prevent regressions and ensure reliable SPLIT_PART behavior across dialects. Overall impact and accomplishments: - Delivered cross-repo parity for SPLIT_PART, enabling accurate string-part extraction in analytics queries and improving migration readiness for PostgreSQL users. - Strengthened test suites with edge-case validation, reducing regression risk and increasing production confidence. Technologies/skills demonstrated: - Java implementation and SQL operator registration (Calcite). - SQL dialect extension and string manipulation logic (Feldera). - Thorough unit testing and edge-case validation, including negative indexing. - Cross-repo collaboration and release readiness.