fix: use spill depth partition bit in new final agg#19626
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dqhl76 merged 7 commits intodatabendlabs:mainfrom Apr 7, 2026
Merged
fix: use spill depth partition bit in new final agg#19626dqhl76 merged 7 commits intodatabendlabs:mainfrom
dqhl76 merged 7 commits intodatabendlabs:mainfrom
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Summary
part of #19622
Context: In the final aggregation stage, incoming data is already partitioned by the partial aggregation stage. As a result, when spilling occurs, all data falls into a single bucket.
Issue: Our design intended to halve memory usage during a spill, but a bug prevented this from happening.
Fix: This commit resolves the issue by adjusting the start bit, which correctly splits the data into two parts.
Testing: Verified by regression test test_partition_mask_with_start_bit.
Tests
Type of change
This change is