23 lines
1.0 KiB
Plaintext
23 lines
1.0 KiB
Plaintext
drop table if exists t1;
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drop table if exists t2;
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create table t1(a bigint, b bigint);
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create table t2(a bigint, b bigint);
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set session tidb_hashagg_partial_concurrency = 1;
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set session tidb_hashagg_final_concurrency = 1;
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explain format = 'brief' select * from t1 where t1.a in (select t1.b + t2.b from t2);
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drop table if exists t;
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create table t(a int primary key, b int, c int, d int, index idx(b,c,d));
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insert into t values(1,1,1,1),(2,2,2,2),(3,2,2,2),(4,2,2,2),(5,2,2,2);
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analyze table t;
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explain format = 'brief' select t.c in (select count(*) from t s use index(idx), t t1 where s.b = 1 and s.c = 1 and s.d = t.a and s.a = t1.a) from t;
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drop table if exists t;
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create table t(a int, b int, c int);
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explain format = 'brief' select a from t t1 where t1.a = (select max(t2.a) from t t2 where t1.b=t2.b and t1.c=t2.b);
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drop table if exists t1, t2;
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create table t1(a int(11));
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create table t2(a decimal(40,20) unsigned, b decimal(40,20));
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select count(*) as x from t1 group by a having x not in (select a from t2 where x = t2.b);
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