[flink] Allow partial updates for AGGREGATION merge engine#2905
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wuchong merged 1 commit intoapache:release-0.9apache/fluss:release-0.9from Mar 19, 2026
platinumhamburg:fix/aggregation-partial-update-0.9platinumhamburg/fluss:fix/aggregation-partial-update-0.9Copy head branch name to clipboard
Merged
[flink] Allow partial updates for AGGREGATION merge engine#2905wuchong merged 1 commit intoapache:release-0.9apache/fluss:release-0.9from platinumhamburg:fix/aggregation-partial-update-0.9platinumhamburg/fluss:fix/aggregation-partial-update-0.9Copy head branch name to clipboard
wuchong merged 1 commit intoapache:release-0.9apache/fluss:release-0.9from
platinumhamburg:fix/aggregation-partial-update-0.9platinumhamburg/fluss:fix/aggregation-partial-update-0.9Copy head branch name to clipboard
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The connector-side validation in FlinkTableSink.getSinkRuntimeProvider() was rejecting partial updates for ALL merge engines (mergeEngineType != null), but the server-side AggregateRowMerger fully supports partial updates via PartialAggregateRowMerger. Narrow the check to only block FIRST_ROW and VERSIONED engines which genuinely do not support partial updates. Add IT case for partial update on aggregation merge engine.
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The connector-side validation in FlinkTableSink.getSinkRuntimeProvider() was rejecting partial updates for ALL merge engines (mergeEngineType != null), but the server-side AggregateRowMerger fully supports partial updates via PartialAggregateRowMerger. Narrow the check to only block FIRST_ROW and VERSIONED engines which genuinely do not support partial updates.
Add IT case for partial update on aggregation merge engine.
Purpose
Linked issue: close #2887
Brief change log
Tests
API and Format
Documentation