December 2025 monthly summary for trinodb/trino: Focused on improving documentation accuracy for connectors by updating example timestamps to reflect current dates in the ElasticSearch and OpenSearch connector docs. No major bug fixes were completed this month. This work enhances onboarding, reduces user confusion, and aligns docs with current connector behavior.

Delivered immutability upgrade for BaseFile field IDs in Apache Iceberg. Refactored equalityFieldIds to return an unmodifiable list and added ArrayUtil.toUnmodifiableIntList, reducing unintended modifications and lowering bug surface. Implemented a zero-copy wrapper for equalityFieldIds to improve performance in hot paths. These changes enhance metadata reliability, maintainability, and overall data pipeline stability, delivering business value through safer and faster BaseFile handling.

Month: 2024-10 — Focused feature delivery in Apache DataFusion by adding Substrait aggregate function ordering support, enabling ORDER BY within aggregate operations in Substrait logical plans. This enhancement improves analytics control, supports more precise business reporting, and strengthens cross-system interoperability aligned with Substrait goals. No major bugs fixed this month; the emphasis was on delivering a traceable feature with a clear business impact. The work adds value by enabling more expressive aggregate queries and smoother integration with downstream analytics workflows.