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select 1+1,1-1,1+1*2,8/5,8%5,mod(8,5),mod(8,5)|0,-(1+1)*-2;
1+1 1-1 1+1*2 8/5 8%5 mod(8,5) mod(8,5)|0 -(1+1)*-2
2 0 3 1.6000 3 3 3 4
explain extended select 1+1,1-1,1+1*2,8/5,8%5,mod(8,5),mod(8,5)|0,-(1+1)*-2;
id select_type table type possible_keys key key_len ref rows filtered Extra
1 SIMPLE NULL NULL NULL NULL NULL NULL NULL NULL No tables used
Warnings:
Note 1003 select 1 + 1 AS `1+1`,1 - 1 AS `1-1`,1 + 1 * 2 AS `1+1*2`,8 / 5 AS `8/5`,8 % 5 AS `8%5`,8 % 5 AS `mod(8,5)`,8 % 5 | 0 AS `mod(8,5)|0`,-(1 + 1) * -2 AS `-(1+1)*-2`
select 1 | (1+1),5 & 3,bit_count(7) ;
1 | (1+1) 5 & 3 bit_count(7)
3 1 3
explain extended select 1 | (1+1),5 & 3,bit_count(7) ;
id select_type table type possible_keys key key_len ref rows filtered Extra
1 SIMPLE NULL NULL NULL NULL NULL NULL NULL NULL No tables used
Warnings:
Note 1003 select 1 | 1 + 1 AS `1 | (1+1)`,5 & 3 AS `5 & 3`,bit_count(7) AS `bit_count(7)`
select 1 << 32,1 << 63, 1 << 64, 4 >> 2, 4 >> 63, 1<< 63 >> 60;
1 << 32 1 << 63 1 << 64 4 >> 2 4 >> 63 1<< 63 >> 60
4294967296 9223372036854775808 0 1 0 8
select -1 | 0, -1 ^ 0, -1 & 0;
-1 | 0 -1 ^ 0 -1 & 0
18446744073709551615 18446744073709551615 0
select -1 | 1, -1 ^ 1, -1 & 1;
-1 | 1 -1 ^ 1 -1 & 1
18446744073709551615 18446744073709551614 1
select 1 | -1, 1 ^ -1, 1 & -1;
1 | -1 1 ^ -1 1 & -1
18446744073709551615 18446744073709551614 1
select 0 | -1, 0 ^ -1, 0 & -1;
0 | -1 0 ^ -1 0 & -1
18446744073709551615 18446744073709551615 0
select -1 >> 0, -1 << 0;
-1 >> 0 -1 << 0
18446744073709551615 18446744073709551615
select -1 >> 1, -1 << 1;
-1 >> 1 -1 << 1
9223372036854775807 18446744073709551614
drop table if exists t1,t2;
create table t1(a int);
create table t2(a int, b int);
insert into t1 values (1), (2), (3);
insert into t2 values (1, 7), (3, 7);
SET @save_optimizer_switch=@@optimizer_switch;
SET optimizer_switch='outer_join_with_cache=off';
select t1.a, t2.a, t2.b, bit_count(t2.b) from t1 left join t2 on t1.a=t2.a;
a a b bit_count(t2.b)
1 1 7 3
2 NULL NULL NULL
3 3 7 3
SET optimizer_switch=@save_optimizer_switch;
drop table t1, t2;
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