ClickHouse/tests/queries/0_stateless/02404_memory_bound_merging.reference

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-- { echoOn } --
explain pipeline select a from remote(test_cluster_two_shards, currentDatabase(), t) group by a;
(Expression)
ExpressionTransform × 4
(MergingAggregated)
MergingAggregatedBucketTransform × 4
Resize 1 → 4
FinishAggregatingInOrderTransform 2 → 1
(Union)
(Aggregating)
SortingAggregatedForMemoryBoundMergingTransform 4 → 1
MergingAggregatedBucketTransform × 4
Resize 1 → 4
FinishAggregatingInOrderTransform 4 → 1
AggregatingInOrderTransform × 4
(Expression)
ExpressionTransform × 4
(ReadFromMergeTree)
MergeTreeInOrder × 4 0 → 1
(ReadFromRemote)
select a from remote(test_cluster_two_shards, currentDatabase(), t) group by a order by a limit 5 offset 100500;
100500
100501
100502
100503
100504
explain pipeline select a from remote(test_cluster_two_shards, currentDatabase(), dist_t) group by a;
(Expression)
ExpressionTransform × 4
(MergingAggregated)
MergingAggregatedBucketTransform × 4
Resize 1 → 4
FinishAggregatingInOrderTransform 2 → 1
(Union)
(MergingAggregated)
SortingAggregatedForMemoryBoundMergingTransform 4 → 1
MergingAggregatedBucketTransform × 4
Resize 1 → 4
FinishAggregatingInOrderTransform 2 → 1
(Union)
(Aggregating)
SortingAggregatedForMemoryBoundMergingTransform 4 → 1
MergingAggregatedBucketTransform × 4
Resize 1 → 4
FinishAggregatingInOrderTransform 4 → 1
AggregatingInOrderTransform × 4
(Expression)
ExpressionTransform × 4
(ReadFromMergeTree)
MergeTreeInOrder × 4 0 → 1
(ReadFromRemote)
(ReadFromRemote)
select a from remote(test_cluster_two_shards, currentDatabase(), dist_t) group by a order by a limit 5 offset 100500;
100500
100501
100502
100503
100504
1
-- { echoOn } --
explain pipeline select a, count() from dist_t_different_dbs group by a order by a limit 5 offset 500;
(Expression)
ExpressionTransform
(Limit)
Limit
(Sorting)
MergingSortedTransform 4 → 1
MergeSortingTransform × 4
LimitsCheckingTransform × 4
PartialSortingTransform × 4
(Expression)
ExpressionTransform × 4
(MergingAggregated)
MergingAggregatedBucketTransform × 4
Resize 1 → 4
FinishAggregatingInOrderTransform 2 → 1
(Union)
(Aggregating)
SortingAggregatedForMemoryBoundMergingTransform 4 → 1
MergingAggregatedBucketTransform × 4
Resize 1 → 4
FinishAggregatingInOrderTransform 4 → 1
AggregatingInOrderTransform × 4
(Expression)
ExpressionTransform × 4
(ReadFromMergeTree)
MergeTreeInOrder × 4 0 → 1
(ReadFromRemote)
select a, count() from dist_t_different_dbs group by a order by a limit 5 offset 500;
500 2000
501 2000
502 2000
503 2000
504 2000
select a, count() from dist_t_different_dbs group by a, b order by a limit 5 offset 500;
500 2000
501 2000
502 2000
503 2000
504 2000
1000000
-- { echoOn } --
explain pipeline select a from pr_t group by a order by a limit 5 offset 500;
(Expression)
ExpressionTransform
(Limit)
Limit
(Sorting)
MergingSortedTransform 4 → 1
MergeSortingTransform × 4
LimitsCheckingTransform × 4
PartialSortingTransform × 4
(Expression)
ExpressionTransform × 4
(MergingAggregated)
Resize 1 → 4
SortingAggregatedTransform 4 → 1
MergingAggregatedBucketTransform × 4
Resize 1 → 4
GroupingAggregatedTransform 3 → 1
(Union)
(ReadFromRemoteParallelReplicas)
select a, count() from pr_t group by a order by a limit 5 offset 500;
500 1000
501 1000
502 1000
503 1000
504 1000
select a, count() from pr_t group by a, b order by a limit 5 offset 500;
500 1000
501 1000
502 1000
503 1000
504 1000