Yu-Chuan Hung
Monday, February 23, 2026 | 2 minutes
Open Source Contributions
Overview
Merged pull requests across Apache open-source projects: DataFusion, DataFusion-Comet, DataFusion-Ballista, Iceberg, and Ozone. Contributions span new features, code quality improvements, documentation fixes, and refactoring.
Apache DataFusion
| PR | Title | Type | Date |
|---|---|---|---|
| #20412 | feat: support Spark-compatible json_tuple function | feat | 2026-02-20 |
| #20076 | chore: Add microbenchmark (compared to ExprOrExpr) | chore | 2026-01-30 |
| #19592 | feat: implement Spark size function for arrays and maps | feat | 2026-01-13 |
| #18443 | chore: Format examples in doc strings - spark, sql, sqllogictest, sibstrait | docs | 2025-11-07 |
| #18353 | chore: Format examples in doc strings - functions | docs | 2025-11-03 |
| #18357 | chore: Format examples in doc strings - physical expr, optimizer, and plan | docs | 2025-11-01 |
| #18335 | chore: Format examples in doc strings - catalog listing | docs | 2025-10-29 |
| #18358 | chore: Format examples in doc strings - proto, pruning, and session | docs | 2025-10-29 |
| #18354 | chore: Format examples in doc strings - macros and optmizer | docs | 2025-10-29 |
| #18338 | chore: Format examples in doc strings - datasource crates | docs | 2025-10-29 |
| #18340 | chore: Format examples in doc strings - expr | docs | 2025-10-29 |
| #18333 | chore: Format examples in doc strings - crate datafusion | docs | 2025-10-29 |
| #18336 | chore: Format examples in doc strings - common | docs | 2025-10-28 |
| #18339 | chore: Format examples in doc strings - execution | docs | 2025-10-28 |
Apache DataFusion-Comet
| PR | Title | Type | Date |
|---|---|---|---|
| #2085 | Chore: refactor datetime related expressions out of QueryPlanSerde | refactor | 2025-08-09 |
| #2028 | Chore: refactor Comparison out of QueryPlanSerde | refactor | 2025-08-05 |
Apache DataFusion-Ballista
| PR | Title | Type | Date |
|---|---|---|---|
| #1337 | feat: make gRPC timeout configurations user-configurable | chore | 2025-11-01 |
Apache Iceberg
| PR | Title | Type | Date |
|---|---|---|---|
| #13466 | Enforce that test classes start with “Test” instead of suffix | fix | 2025-07-15 |
| #13447 | Build: Fix error-prone warning | fix | 2025-07-02 |
| #13427 | Docs: Correct typo in spec.md | fix | 2025-06-30 |
| #13217 | Build: Fix errorprone warnings | fix | 2025-06-27 |
Apache Ozone
| PR | Title | Type | Date |
|---|---|---|---|
| #8720 | HDDS-13355. Remove unused class OzoneManagerLockUtil | refactor | 2025-07-02 |