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select 0,256,00000000000000065536,2147483647,-2147483648,2147483648,+4294967296;
0 256 00000000000000065536 2147483647 -2147483648 2147483648 +4294967296
0 256 65536 2147483647 -2147483648 2147483648 4294967296
select 9223372036854775807,-009223372036854775808;
9223372036854775807 -009223372036854775808
9223372036854775807 -9223372036854775808
select +9999999999999999999,-9999999999999999999;
+9999999999999999999 -9999999999999999999
10000000000000000000 -10000000000000000000
drop table if exists t1;
create table t1 (a bigint unsigned not null, primary key(a));
insert into t1 values (18446744073709551615), (0xFFFFFFFFFFFFFFFE);
select * from t1;
a
18446744073709551614
18446744073709551615
select * from t1 where a=18446744073709551615;
a
18446744073709551615
select * from t1 where a='18446744073709551615';
a
18446744073709551615
delete from t1 where a=18446744073709551615;
select * from t1;
a
18446744073709551614
drop table t1;
create table t1 ( a int not null default 1, big bigint );
insert into t1 (big) values (-1),(12345678901234567),(9223372036854775807),(18446744073709551615);
select min(big),max(big),max(big)-1 from t1;
min(big) max(big) max(big)-1
-1 9223372036854775807 9223372036854775806
select min(big),max(big),max(big)-1 from t1 group by a;
min(big) max(big) max(big)-1
-1 9223372036854775807 9223372036854775806
alter table t1 modify big bigint unsigned not null;
select min(big),max(big),max(big)-1 from t1;
min(big) max(big) max(big)-1
12345678901234567 18446744073709551615 18446744073709551614
select min(big),max(big),max(big)-1 from t1 group by a;
min(big) max(big) max(big)-1
12345678901234567 18446744073709551615 18446744073709551614
alter table t1 add key (big);
select min(big),max(big),max(big)-1 from t1;
min(big) max(big) max(big)-1
12345678901234567 18446744073709551615 18446744073709551614
select min(big),max(big),max(big)-1 from t1 group by a;
min(big) max(big) max(big)-1
12345678901234567 18446744073709551615 18446744073709551614
alter table t1 modify big bigint not null;
select min(big),max(big),max(big)-1 from t1;
min(big) max(big) max(big)-1
-1 9223372036854775807 9223372036854775806
select min(big),max(big),max(big)-1 from t1 group by a;
min(big) max(big) max(big)-1
-1 9223372036854775807 9223372036854775806
drop table t1;
select CAST(1-2 AS UNSIGNED);
CAST(1-2 AS UNSIGNED)
18446744073709551615
select CAST(CAST(1-2 AS UNSIGNED) AS SIGNED INTEGER);
CAST(CAST(1-2 AS UNSIGNED) AS SIGNED INTEGER)
-1
select CONVERT('-1',UNSIGNED);
CONVERT('-1',UNSIGNED)
18446744073709551615
select cast(-5 as unsigned) | 1, cast(-5 as unsigned) & -1;
cast(-5 as unsigned) | 1 cast(-5 as unsigned) & -1
18446744073709551611 18446744073709551611
select cast(-5 as unsigned) -1, cast(-5 as unsigned) + 1;
cast(-5 as unsigned) -1 cast(-5 as unsigned) + 1
18446744073709551610 18446744073709551612
select ~5, cast(~5 as signed);
~5 cast(~5 as signed)
18446744073709551610 -6
select cast(5 as unsigned) -6.0;
cast(5 as unsigned) -6.0
-1.0
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