feat: support merge-engine=aggregation (basic mode)#340

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TheR1sing3un wants to merge 9 commits into

apache:mainfrom

TheR1sing3un:feat/merge-engine-aggregation

Commits on May 20, 2026

feat(spec): add MergeEngine::Aggregation variant and basic-mode config
TheR1sing3un
committed
fix(table): route MergeEngine::Aggregation through read_pk and reject in cross-partition writes
TheR1sing3un
committed
feat(table/aggregator): add FieldAggregator trait and basic-mode aggregators
TheR1sing3un
committed
fix(table/aggregator): reject DECIMAL product and align CountAgg docs with code
TheR1sing3un
committed
feat(table/sort_merge): wire AggregateMergeFunction into the read path
TheR1sing3un
committed
fix(table/sort_merge): clearer PK-NULL error message and tighten AggregateMergeFunction
TheR1sing3un
committed
test(datafusion): add E2E coverage for merge-engine=aggregation
TheR1sing3un
committed
fix(test): tighten DELETE-rejection assertion and fix sum-NULL doc comment
TheR1sing3un
committed
fix(test): use Result::expect_err instead of .err().expect()
TheR1sing3un
committed