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25 lines
1.9 KiB
SQL
25 lines
1.9 KiB
SQL
select '-- check that distinct with and w/o optimization produce the same result';
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drop table if exists distinct_in_order sync;
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drop table if exists ordinary_distinct sync;
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select '-- DISTINCT columns are the same as in ORDER BY';
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create table distinct_in_order (CounterID UInt32, EventDate Date) engine=MergeTree() order by (CounterID, EventDate) SETTINGS index_granularity = 8192, index_granularity_bytes = '10Mi';
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insert into distinct_in_order select distinct CounterID, EventDate from test.hits order by CounterID, EventDate settings optimize_distinct_in_order=1;
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create table ordinary_distinct (CounterID UInt32, EventDate Date) engine=MergeTree() order by (CounterID, EventDate) SETTINGS index_granularity = 8192, index_granularity_bytes = '10Mi';
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insert into ordinary_distinct select distinct CounterID, EventDate from test.hits order by CounterID, EventDate settings optimize_distinct_in_order=0;
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select distinct * from distinct_in_order except select * from ordinary_distinct;
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drop table if exists distinct_in_order sync;
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drop table if exists ordinary_distinct sync;
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select '-- DISTINCT columns has prefix in ORDER BY columns';
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create table distinct_in_order (CounterID UInt32, EventDate Date) engine=MergeTree() order by (CounterID, EventDate) SETTINGS index_granularity = 8192, index_granularity_bytes = '10Mi';
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insert into distinct_in_order select distinct CounterID, EventDate from test.hits order by CounterID settings optimize_distinct_in_order=1;
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create table ordinary_distinct (CounterID UInt32, EventDate Date) engine=MergeTree() order by (CounterID, EventDate) SETTINGS index_granularity = 8192, index_granularity_bytes = '10Mi';
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insert into ordinary_distinct select distinct CounterID, EventDate from test.hits order by CounterID settings optimize_distinct_in_order=0;
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select distinct * from distinct_in_order except select * from ordinary_distinct;
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drop table if exists distinct_in_order sync;
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drop table if exists ordinary_distinct sync;
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