April 2026: Delivered targeted improvements to the ORCA optimizer and stability fixes that enhance data consistency, upgrade reliability, and overall planner accuracy for Greengage. Key work centered on session-aware scans and a revert to correct logging during upgrades, with unit tests updated accordingly.

March 2026 monthly summary: Key features delivered and bugs fixed across arenadata/gpdb and GreengageDB/greengage, with measurable business value and strong technical outcomes. Highlights include ORCA Optimizer improvement to prevent redundant redistributions during joins for compatible types, reducing data movement and planning time, and a bug fix in the PostgreSQL planner to filter resjunk columns when deriving CTAS distribution keys, preventing segmentation faults. The work includes test coverage and cross-repo collaboration to improve stability and scalability of distributed analytics.

February 2026: Delivered core optimizer improvements and a critical hash-join bug fix that reduce data movement and improve query performance in distributed workloads. Highlights include ORCA optimizer enhancement for Greengage to avoid unnecessary redistributions during joins via distribution matching, and a GPDB hash-join redistribution fix that prioritizes matching logic to preserve redistribution opportunities. These changes improve planning efficiency, lower network I/O, and simplify maintenance.

December 2025 monthly summary for GreengageDB/greengage focusing on test integrity and cost-model alignment with hash join changes. Delivered a focused unit-test fix to ensure Orca CCTETest cost model reflects current behavior, enabling reliable performance assessments and stable CI.