Closing an operator gap
Missing string aggregation prevented a complete industry benchmark suite from running on Sirius. I integrated the aggregation behavior into the GPU execution path so the workload could execute end to end.
- Added libcudf-backed string aggregation support.
- Unblocked the full benchmark suite.
- Expanded support for string-heavy analytical workloads.
Correctness before speed
GPU acceleration is only useful when calculations match the query contract. I traced failures through aggregation and numeric execution paths and corrected bugs exposed by the benchmark workload.
- Fixed overflow calculation behavior.
- Corrected empty-value handling.
- Merged the work through PRs #124 and #115.
Upstream contribution
The aggregation feature and correctness fixes were reviewed and merged into the 1K+ star open-source GPU database.
- Used benchmark failures to expose missing behavior and calculation bugs.
- Kept the changes scoped to maintainable upstream patches.
- Documented affected execution paths through pull-request review.