chore(query): modify new_agg_hashtable payload transmission method on singleton and support new_agg_hashtable on cluster #14798
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src/query/service/src/pipelines/processors/transforms/aggregator/transform_partition_bucket.rs
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src/query/sql/src/executor/physical_plans/physical_aggregate_partial.rs
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… singleton and support new_agg_hashtable on cluster (databendlabs#14798)
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… singleton and support new_agg_hashtable on cluster (databendlabs#14798) * refactor new_agg_hashtable * test * test * fmt * test * test * test * format explain --------- Co-authored-by: jw <[email protected]> (cherry picked from commit f04c367)
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Summary
In the previous PR feat(query): agg-hashtable-singleton #14524, we implemented a new_agg_hashtable on singleton. In the partial phase, we sent the entire
PartitionedPayload. While this approach is correct for singletons, it may cause scatter skew if used in the same manner on a cluster. To ensure compatibility with the cluster, we refactored the payload transmission method for new_agg_hashtable in the standalone version. Now, we send each individualPayloadseparately.support new_agg_hashtable on cluster, to be enabled using:
set enable_experimental_aggregate_hashtable = 1;Tests
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