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23 lines
1009 B
SQL
23 lines
1009 B
SQL
-- Tags: distributed
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drop table if exists projection_test;
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create table projection_test (dt DateTime, cost Int64, projection p (select toStartOfMinute(dt) dt_m, sum(cost) group by dt_m)) engine MergeTree partition by toDate(dt) order by dt;
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insert into projection_test with rowNumberInAllBlocks() as id select toDateTime('2020-10-24 00:00:00') + (id / 20), * from generateRandom('cost Int64', 10, 10, 1) limit 1000 settings max_threads = 1;
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set allow_experimental_projection_optimization = 1, force_optimize_projection = 1;
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select toStartOfMinute(dt) dt_m, sum(cost) from projection_test group by dt_m;
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select sum(cost) from projection_test;
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drop table if exists projection_test_d;
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create table projection_test_d (dt DateTime, cost Int64) engine Distributed(test_cluster_two_shards, currentDatabase(), projection_test);
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select toStartOfMinute(dt) dt_m, sum(cost) from projection_test_d group by dt_m;
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select sum(cost) from projection_test_d;
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drop table projection_test;
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drop table projection_test_d;
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