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

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TheR1sing3un wants to merge 13 commits into

apache:mainfrom

TheR1sing3un:feat/merge-engine-aggregation

Commits on Jun 2, 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
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feat(table/aggregator): add FieldAggregator trait and basic-mode aggregators
TheR1sing3un
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fix(table/aggregator): reject DECIMAL product and align CountAgg docs with code
TheR1sing3un
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feat(table/sort_merge): wire AggregateMergeFunction into the read path
TheR1sing3un
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fix(table/sort_merge): clearer PK-NULL error message and tighten AggregateMergeFunction
TheR1sing3un
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test(datafusion): add E2E coverage for merge-engine=aggregation
TheR1sing3un
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fix(test): tighten DELETE-rejection assertion and fix sum-NULL doc comment
TheR1sing3un
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fix(test): use Result::expect_err instead of .err().expect()
TheR1sing3un
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fix(table/aggregator): align with Java AggregateMergeFunction parity
TheR1sing3un
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docs(table/sort_merge): rewrite AggregateMergeFunction doc to match new priority
TheR1sing3un
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feat(spec/aggregation): make validate_create_mode schema-aware
TheR1sing3un
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test(datafusion): cover schema-aware aggregation create-time rejections
TheR1sing3un
committed