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68 lines
2.5 KiB
SQL
68 lines
2.5 KiB
SQL
-- Tags: no-object-storage
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-- produces different pipeline if enabled
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set enable_memory_bound_merging_of_aggregation_results = 0;
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set merge_tree_read_split_ranges_into_intersecting_and_non_intersecting_injection_probability = 0.0;
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set max_threads = 16;
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set prefer_localhost_replica = 1;
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set optimize_aggregation_in_order = 0;
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set max_block_size = 65505;
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set allow_prefetched_read_pool_for_remote_filesystem = 0;
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set allow_prefetched_read_pool_for_local_filesystem = 0;
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-- { echoOn }
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explain pipeline select * from (select * from numbers(1e8) group by number) group by number settings max_rows_to_read = 0;
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explain pipeline select * from (select * from numbers_mt(1e8) group by number) group by number settings max_rows_to_read = 0;
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explain pipeline select * from (select * from numbers_mt(1e8) group by number) order by number settings max_rows_to_read = 0;
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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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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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-- { echoOff }
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DROP TABLE IF EXISTS proj_agg_02343;
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CREATE TABLE proj_agg_02343
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(
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k1 UInt32,
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k2 UInt32,
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k3 UInt32,
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value UInt32,
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PROJECTION aaaa
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(
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SELECT
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k1,
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k2,
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k3,
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sum(value)
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GROUP BY k1, k2, k3
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)
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)
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ENGINE = MergeTree
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ORDER BY tuple();
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INSERT INTO proj_agg_02343 SELECT 1, number % 2, number % 4, number FROM numbers(100000);
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OPTIMIZE TABLE proj_agg_02343 FINAL;
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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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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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-- { echoOff }
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create table t(a UInt64) engine = MergeTree order by (a);
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system stop merges t;
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create table dist_t as t engine = Distributed(test_cluster_two_shards, currentDatabase(), t, a % 2);
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system stop merges dist_t;
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insert into dist_t select number from numbers_mt(10);
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insert into dist_t select number from numbers_mt(10);
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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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