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https://github.com/ClickHouse/ClickHouse.git
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145 lines
5.0 KiB
Plaintext
145 lines
5.0 KiB
Plaintext
-- { echoOn }
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explain pipeline select * from (select * from numbers(1e8) group by number) group by number;
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(Expression)
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ExpressionTransform × 16
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(Aggregating)
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Resize 16 → 16
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AggregatingTransform × 16
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StrictResize 16 → 16
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(Expression)
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ExpressionTransform × 16
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(Aggregating)
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Resize 1 → 16
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AggregatingTransform
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(Expression)
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ExpressionTransform
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(ReadFromStorage)
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Limit
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Numbers 0 → 1
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explain pipeline select * from (select * from numbers_mt(1e8) group by number) group by number;
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(Expression)
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ExpressionTransform × 16
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(Aggregating)
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Resize 16 → 16
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AggregatingTransform × 16
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StrictResize 16 → 16
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(Expression)
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ExpressionTransform × 16
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(Aggregating)
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Resize 16 → 16
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AggregatingTransform × 16
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(Expression)
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ExpressionTransform × 16
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(ReadFromStorage)
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NumbersMt × 16 0 → 1
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explain pipeline select * from (select * from numbers_mt(1e8) group by number) order by number;
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(Expression)
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ExpressionTransform
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(Sorting)
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MergingSortedTransform 16 → 1
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MergeSortingTransform × 16
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LimitsCheckingTransform × 16
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PartialSortingTransform × 16
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(Expression)
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ExpressionTransform × 16
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(Aggregating)
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Resize 16 → 16
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AggregatingTransform × 16
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(Expression)
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ExpressionTransform × 16
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(ReadFromStorage)
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NumbersMt × 16 0 → 1
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explain pipeline select number from remote('127.0.0.{1,2,3}', system, numbers_mt) group by number settings distributed_aggregation_memory_efficient = 1;
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(Expression)
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ExpressionTransform × 16
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(MergingAggregated)
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Resize 1 → 16
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SortingAggregatedTransform 16 → 1
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MergingAggregatedBucketTransform × 16
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Resize 1 → 16
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GroupingAggregatedTransform 3 → 1
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(Union)
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(Aggregating)
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Resize 16 → 1
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AggregatingTransform × 16
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(Expression)
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ExpressionTransform × 16
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(ReadFromStorage)
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Numbers × 16 0 → 1
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(ReadFromRemote)
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explain pipeline select number from remote('127.0.0.{1,2,3}', system, numbers_mt) group by number settings distributed_aggregation_memory_efficient = 0;
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(Expression)
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ExpressionTransform × 16
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(MergingAggregated)
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Resize 1 → 16
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MergingAggregatedTransform
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Resize 18 → 1
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(Union)
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(Aggregating)
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Resize 16 → 16
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AggregatingTransform × 16
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(Expression)
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ExpressionTransform × 16
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(ReadFromStorage)
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Numbers × 16 0 → 1
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(ReadFromRemote)
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-- { echoOn }
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explain pipeline SELECT k1, k3, sum(value) v FROM remote('127.0.0.{1,2}', currentDatabase(), proj_agg_02343) GROUP BY k1, k3 SETTINGS distributed_aggregation_memory_efficient = 0;
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(Expression)
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ExpressionTransform × 16
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(MergingAggregated)
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Resize 1 → 16
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MergingAggregatedTransform
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Resize 2 → 1
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(Union)
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(ReadFromStorage)
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AggregatingTransform
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ExpressionTransform
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MergeTreeInOrder 0 → 1
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(ReadFromRemote)
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explain pipeline SELECT k1, k3, sum(value) v FROM remote('127.0.0.{1,2}', currentDatabase(), proj_agg_02343) GROUP BY k1, k3 SETTINGS distributed_aggregation_memory_efficient = 1;
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(Expression)
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ExpressionTransform × 16
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(MergingAggregated)
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Resize 1 → 16
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SortingAggregatedTransform 16 → 1
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MergingAggregatedBucketTransform × 16
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Resize 1 → 16
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GroupingAggregatedTransform 2 → 1
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(Union)
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(ReadFromStorage)
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AggregatingTransform
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ExpressionTransform
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MergeTreeInOrder 0 → 1
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(ReadFromRemote)
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-- { echoOn }
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explain pipeline select a from remote('127.0.0.{1,2}', currentDatabase(), dist_t) group by a settings max_threads = 2, distributed_aggregation_memory_efficient = 1;
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(Expression)
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ExpressionTransform × 2
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(MergingAggregated)
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Resize 1 → 2
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SortingAggregatedTransform 2 → 1
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MergingAggregatedBucketTransform × 2
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Resize 1 → 2
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GroupingAggregatedTransform 2 → 1
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(Union)
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(MergingAggregated)
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SortingAggregatedTransform 2 → 1
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MergingAggregatedBucketTransform × 2
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Resize 1 → 2
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GroupingAggregatedTransform 2 → 1
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(Union)
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(Aggregating)
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Resize 2 → 1
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AggregatingTransform × 2
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StrictResize 2 → 2
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(Expression)
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ExpressionTransform × 2
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(ReadFromMergeTree)
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MergeTreeThread × 2 0 → 1
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(ReadFromRemote)
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(ReadFromRemote)
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