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42 lines
1.2 KiB
SQL
42 lines
1.2 KiB
SQL
-- Tags: long
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drop table if exists stack;
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set max_insert_threads = 4;
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-- Temporary disable aggregation in order,
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-- because it may fail with UBSan.
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set optimize_aggregation_in_order = 0;
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create table stack(item_id Int64, brand_id Int64, rack_id Int64, dt DateTime, expiration_dt DateTime, quantity UInt64)
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Engine = MergeTree
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partition by toYYYYMM(dt)
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order by (brand_id, toStartOfHour(dt));
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insert into stack
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select number%99991, number%11, number%1111, toDateTime('2020-01-01 00:00:00')+number/100,
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toDateTime('2020-02-01 00:00:00')+number/10, intDiv(number,100)+1
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from numbers_mt(10000000);
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select '---- arrays ----';
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select cityHash64( toString( groupArray (tuple(*) ) )) from (
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select brand_id, rack_id, arrayJoin(arraySlice(arraySort(groupArray(quantity)),1,2)) quantity
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from stack
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group by brand_id, rack_id
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order by brand_id, rack_id, quantity
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) t;
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select '---- window f ----';
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select cityHash64( toString( groupArray (tuple(*) ) )) from (
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select brand_id, rack_id, quantity from
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( select brand_id, rack_id, quantity, row_number() over (partition by brand_id, rack_id order by quantity) rn
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from stack ) as t0
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where rn <= 2
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order by brand_id, rack_id, quantity
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) t;
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drop table if exists stack;
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