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https://github.com/mariadb-corporation/mariadb-columnstore-engine.git
synced 2025-05-28 13:01:26 +03:00
242bc75166
Disable check for correlated subqueries, basically those types of queries transforms to join (aggr(table2), table1), table2) and post join scalar filter.
59 lines
1.4 KiB
Plaintext
59 lines
1.4 KiB
Plaintext
DROP DATABASE IF EXISTS mcol5195;
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CREATE DATABASE mcol5195;
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USE mcol5195;
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create table t1 (a int, b int) engine=columnstore;
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create table t2 (a int, b int) engine=columnstore;
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insert into t1 values (1, 2), (1, 3), (1, 4), (2, 5), (2, 6), (2, 7);
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insert into t2 values (1, 2), (1, 2), (1, 4), (2, 5), (2, 6), (2, 8);
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select * from t1, t2 where t1.a = t2.a and t2.b = (select max(b) from t2 where t1.a = t2.a) order by t2.b;
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a b a b
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1 4 1 4
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1 2 1 4
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1 3 1 4
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2 7 2 8
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2 5 2 8
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2 6 2 8
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select * from t1, t2 where t1.a = t2.a and t2.b < (select max(b) from t2 where t1.a = t2.a) order by t2.b;
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a b a b
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1 3 1 2
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1 4 1 2
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1 2 1 2
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1 4 1 2
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1 2 1 2
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1 3 1 2
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2 6 2 5
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2 5 2 5
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2 7 2 5
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2 5 2 6
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2 6 2 6
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2 7 2 6
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select * from t1, t2 where t1.a = t2.a and t2.b > (select max(b) from t2 where t1.a = t2.a) order by t2.b;
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a b a b
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select * from t1, t2 where t1.a = t2.a and t1.b = (select avg(t2.b) from t2 where t1.a = t2.a group by t2.a) order by t2.b;
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a b a b
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select * from t1, t2 where t1.a = t2.a and t2.b < (select avg(t2.b) from t2 where t1.a = t2.a group by t2.a) order by t2.b;
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a b a b
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1 3 1 2
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1 4 1 2
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1 2 1 2
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1 4 1 2
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1 2 1 2
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1 3 1 2
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2 6 2 5
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2 5 2 5
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2 7 2 5
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2 5 2 6
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2 6 2 6
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2 7 2 6
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select * from t1, t2 where t1.a = t2.a and t2.b > (select avg(t2.b) from t2 where t1.a = t2.a group by t2.a) order by t2.b;
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a b a b
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1 4 1 4
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1 2 1 4
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1 3 1 4
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2 7 2 8
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2 5 2 8
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2 6 2 8
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drop table t1;
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drop table t2;
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DROP DATABASE mcol5195;
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