220 lines
7.2 KiB
SQL
220 lines
7.2 KiB
SQL
#select c1 from t1 where c1 between 10000 and 1000;
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#select c1 from t1 where c1 not in (500, 1000)
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#select c1 from t1 where (c1, c2) = (2000, 10000);
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#select c1 from t1 where c1 = (select c2 from t1 where c2 >= 10000);
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#select c1 from t1 where c1 = 1000;
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select 0.2 HALF_OPEN_RANGE_SEL.
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select c1 from t1 where c1 > 1000 or (c1 > 2000 and c1 < 3000);
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# const
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select 1;
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select c1 from t1 where 1;
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select 1;
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select c1 from t1 where 1 > 0;
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select 0;
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select c1 from t1 where 0;
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select 0;
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select c1 from t1 where null;
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# distinct(1000), min(500), max(10000), nullnum(100)
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#equal a = 1
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#等值条件现都视为1/distinct
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select 1/500*0.99;
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select c1 from t1 where c1 = 999;
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select 1/500*0.99;
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select c1 from t1 where c1 = 10001;
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select 1/500*0.99;
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select c1 from t1 where c1 = 1000;
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select 0.01
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select c1 from t1 where c1 <=> null;
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select 0
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select c1 from t1 where c1 = null;
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select 1/500*0.99;
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select c1 from t1 where c1 + 1 = 1000;
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select 1/500*0.99;
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select c1 from t1 where c1 * 2 = 1000;
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select 0.005(DEFAULT_EQ_SEL)
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select c1 from t1 where c1 / 2 = 1000;
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select 1/500*0.99;
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select c1 from t1 where c1 - 100 = 1000;
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# range cond
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select 0;
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select c1 from t1 where c1 > null;
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select 1;
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select c1 from t1 where c1 > null or 1 > 0;
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select 0;
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select c1 from t1 where c1 > null or 1 > 2;
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select 0;
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select c1 from t1 where c1 < null;
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select 0.2 HALF_OPEN_RANGE_SEL.
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select c1 from t1 where c1 > 30;
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select 0.2 HALF_OPEN_RANGE_SEL.
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select c1 from t1 where c1 < 50;
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select 1.0/3.0 as not calc
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select c1 from t1 where c1 + 1 > 5;
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select 0.2 HALF_OPEN_RANGE_SEL.
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select c1 from t1 where c1 > 2000;
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#不考虑=值的影响
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select 0.2 HALF_OPEN_RANGE_SEL.
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select c1 from t1 where c1 >= 2000;
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select 0.2 HALF_OPEN_RANGE_SEL.
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select c1 from t1 where c1 < 5000;
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select (5000-1000)/(10000-1000) * 0.95;
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select c1 from t1 where c1 <= 5000;
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select 0.2 HALF_OPEN_RANGE_SEL.
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select c1 from t1 where c1 <= 500;
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select 0.2 HALF_OPEN_RANGE_SEL.
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select c1 from t1 where c1 >= 10000;
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#T_OP_NE 未做处理
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select 1 - 0.01 - 1/500*0.99
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select c1 from t1 where c1 != 500;
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select 1 - 0.01 - 1/500*0.99
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select c1 from t1 where c1 != 50;
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select 1 - 0.01 - 1/500*0.99
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select c1 from t1 where c1 + 1 != 50;
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select 1 - 0.01 - 1/500*0.99
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select c1 from t1 where c1 * 2 != 50;
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select 0.5
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select c1 from t1 where c1 / 2 != 50;
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# and && or 混合 A and B: A*B, A OR B : A + B - A*B
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#以上为所需单个条件的选择率
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select 5 * 1 / 500 * 0.99 (5 * EST_DEF_VAR_EQ_SEL)
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select c1 from t1 where c1 > 2000 and c1 < 3000;
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select 0.2 HALF_OPEN_RANGE_SEL.
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select c1 from t1 where c1 > 10000 and c1 > 500;
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select 5 * 1 / 500 * 0.99 (5 * EST_DEF_VAR_EQ_SEL)
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select c1 from t1 where c1 < 10000 and c1 > 500;
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select 0.2 * 2
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select c1 from t1 where c1 < 500 or c1 > 10000;
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select 0.2 * 2
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select c1 from t1 where c1 > 2000 or c1 < 1000;
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select 0.2 * 2
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select c1 from t1 where c1 > 2000 or c1 < 1000 or c1 < 500;
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select 0.2 + 0.0099
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select c1 from t1 where c1 > 2000 or (c1 < 1000 and c1 > 500);
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select 5 * 1 / 500 * 0.99 (5 * EST_DEF_VAR_EQ_SEL)
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select c1 from t1 where c1 < 1000 and c1 > 500;
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select 0.2
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select c1 from t1 where c1 < 1000 or (c1 > 9000 and c1 > 2000 and c1 < 8000);
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select 0.2
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select c1 from t1 where c1 < 500 or (c1 > 10000 and c1 > 10001 and c1 < 499);
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#T_OP_IS
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select 0.01
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select c1 from t1 where c1 is null;
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select 1/500 * 0.99;
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select c1 from t1 where c1 is false;
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select 1- 0.01 - 1/500*0.99(suppose the ratio of false);
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select c1 from t1 where c1 is true;
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#T_OP_NOT
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select 1 - 0.01;
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select c1 from t1 where c1 is not null;
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select 1 - 1/500 * 0.99;
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select c1 from t1 where c1 is not false;
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select 0.01 + 1/500*0.99;
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select c1 from t1 where c1 is not true;
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select 0;
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select * from t1 where not 1;
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select 1;
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select * from t1 where not 0;
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select 0.2;
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select * from t1 where not c1 > 2000;
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select 0.2 + 0.2;
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select * from t1 where not (c1 > 2000 and c1 < 3000);
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select 0.99 - 1/500*0.99*2;
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select * from t1 where not c1 in (2000, 3000);
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#T_OP_IN
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#T_OP_NOT_IN 无法精确计算null_sel,所以这里忽略null_sel.
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select 1/500*0.99 * 3;
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select c1 from t1 where c1 in (500, 8000, 10000);
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select square(1/500*0.99) * 2
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select c1 from t1 where (c1,c2) in ((500, 8000), (8000, 10000));
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# const in const
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select 1;
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select c1 from t1 where (200) in (100, 200);
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select 1;
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select c1 from t1 where (200) in (100, 300, 400, 200);
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select 0;
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select c1 from t1 where (200) in (100, 300, 400, 500);
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select 1;
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select c1 from t1 where (200) in (c1, 300, 400, 500);
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select 1;
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select c1 from t1 where (c1) in (c1, 300, 400, 500);
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EXPECTED select 0.99 - 1/500*0.99 * 3;
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select c1 from t1 where c1 not in (500, 8000, 10000);
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EXPECTED select 0.99 - 1/500*0.99 * 2;
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select c1 from t1 where c1 not in (500, 1000);
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EXPECTED select 0.99 - 1/500*0.99 * 1/500*0.99*2;
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select c1 from t1 where (c1,c2) not in ((500, 8000), (8000, 10000));
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#BTW, NOT BTW
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select 1/500*0.99*5;
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select c1 from t1 where c1 between 1000 and 10000;
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select 0.4;
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select c1 from t1 where c1 not between 1000 and 10000;
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select 1/500*0.99;
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select c1 from t1 where c1 between 1000 and 1000;
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select 0.4;
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select c1 from t1 where c1 not between 1000 and 1000;
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select 0;
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select c1 from t1 where c1 between 10000 and 1000;
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select 0.4;
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select c1 from t1 where c1 not between 10000 and 1000;
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select 0;
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select c1 from t1 where c1 >= 10000 and c1<=1000;
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select 0.2;
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select c1 from t1 where 1000 between c1 and 1000;
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select 0.2;
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select c1 from t1 where 1000 not between c1 and 1000;
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#btw的最小选择率暂时未设置，这里会直接为0
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select 0;
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select c1 from t1 where 1000 between 10000 and c1;
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select 0.2;
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select c1 from t1 where 2000 between 1000 and c1;
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select 1;
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select c1 from t1 where 1 between 0 and 1;
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select 0;
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select c1 from t1 where 100 between 0 and 1;
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#JOIN COND
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# min(basic_sel1, basic_sel2)
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select 1/500*0.99;
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select t1.c1 from t1,t2 where t1.c1 = t2.c1;
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select 1/500*0.99;
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select t1.c1 from t1,t2 where t1.c1 + 1 = t2.c1;
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select 1/500*0.99;
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select t1.c1 from t1,t2 where t1.c1 + 1 = t2.c1 + 1;
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select 1/500*0.99;
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select t1.c1 from t1,t2 where t1.c1 * 2 = t2.c1 + 1;
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select 1/500*0.99;
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select t1.c1 from t1,t2 where t1.c1 / 2 = t2.c1 + 1;
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select 1/500*0.99 * (1/3);
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select t1.c1 from t1,t2 where t1.c1 = t2.c1 and t1.c2 > t2.c2;
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select 1/3;
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select t1.c1 from t1, t2 where t1.c1 < t2.c2;
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select 0.5;
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select t1.c1 from t1, t2 where t1.c1 != t2.c2;
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# IS_WITH_SUBQUERY
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select 1/500*0.99
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select c1 from t1 where c1 = (select c2 from t1 where c2 >= 10000);
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select 1.0 / 3.0 DEFAULT_INEQ_SEL
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select c1 from t1 where c1 > (select c2 from t1 where c2 >= 10000);
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todo. 1- 1/500*0.99 - 0.01
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select c1 from t1 where c1 != (select c2 from t1 where c2 >= 10000);
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todo. DEFAULT_SEL
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select c1 from t1 where c1 in (select c2 from t1 where c2 = 10000);
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todo. DEFAULT_SEL
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select c1 from t1 where c1 = ANY (select c2 from t1 where c2 > 1000);
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todo. DEFAULT_SEL
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select c1 from t1 where c1 != ANY (select c2 from t1 where c2 > 1000);
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todo. DEFAULT_SEL
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select c1 from t1 where c1 = SOME (select c2 from t1 where c2 > 1000);
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todo. DEFAULT_SEL
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select c1 from t1 where c1 != SOME (select c2 from t1 where c2 > 1000);
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todo. DEFAULT_SEL
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select c1 from t1 where c1 = ALL (select c2 from t1 where c2 > 1000);
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todo. DEFAULT_SEL
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select c1 from t1 where c1 != ALL (select c2 from t1 where c2 > 1000);
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#ROW
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select 1/500 * 0.99 * (1/500 * 0.99)
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select c1 from t1 where (c1, c2) = (2000, 10000);
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todo. 0.5
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select c1 from t1 where (c1, c2) != (2000, 10000);
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select 0.2
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select c1 from t1 where (c1, c2) > (2000, 10000);
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