Azat Khuzhin 3931dbd848 Implement partial GROUP BY key for optimize_aggregation_in_order ... Suppose you have a table with lots of rows, like: create table data_02233 (parent_key Int, child_key Int, value Int) engine=MergeTree() order by parent_key And you want to do GROUP BY (parent_key, child_key) with optimize_aggregation_in_order: select parent_key, child_key, count() from data_02233 group by parent_key, child_key with totals order by parent_key, child_key Right now, it is not possible, because optimize_aggregation_in_order supports only w/o key aggregation, i.e. GROUP BY cannot be done inside unique parent_key region. v2: rebase on top SortDescriptionWithPositions v3: disable two-level aggregation v4: fix merging of aggregates v5: improve tests coverage (add a test with multiple parts, to add merge processor) v6: add a test for compiled aggregate functions (sum()) explicitly v7: add missing sortBlock() v8: remove group_by_description_optimized Signed-off-by: Azat Khuzhin <a.khuzhin@semrush.com>		2022-04-29 06:58:07 +03:00
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0_stateless	Implement partial GROUP BY key for optimize_aggregation_in_order	2022-04-29 06:58:07 +03:00
1_stateful	Update 00170_s3_cache.reference	2022-04-28 16:41:23 +02:00
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