create table t1 (a int unsigned not null, primary key(a)) engine='InnoDB' 
partition by key (a) (
partition pa1 max_rows=20 min_rows=2,
partition pa2 max_rows=30 min_rows=3,
partition pa3 max_rows=30 min_rows=4,
partition pa4 max_rows=40 min_rows=2);
show create table t1;
Table	Create Table
t1	CREATE TABLE `t1` (
  `a` int(10) unsigned NOT NULL,
  PRIMARY KEY (`a`)
) ENGINE=InnoDB DEFAULT CHARSET=latin1
/*!50100 PARTITION BY KEY (a)
(PARTITION pa1 MAX_ROWS = 20 MIN_ROWS = 2 ENGINE = InnoDB,
 PARTITION pa2 MAX_ROWS = 30 MIN_ROWS = 3 ENGINE = InnoDB,
 PARTITION pa3 MAX_ROWS = 30 MIN_ROWS = 4 ENGINE = InnoDB,
 PARTITION pa4 MAX_ROWS = 40 MIN_ROWS = 2 ENGINE = InnoDB) */
insert into t1 values (4294967295), (4294967294), (4294967293), (4294967292), (1), (2), (65535);
select * from t1;
a
1
2
4294967292
4294967293
4294967294
4294967295
65535
select * from t1 where a=4294967293;
a
4294967293
delete from t1 where a=4294967293;
select * from t1;
a
1
2
4294967292
4294967294
4294967295
65535
drop table t1;
create table t2 (a int unsigned not null, primary key(a)) engine='InnoDB' 
partition by key (a) partitions 8;
show create table t2;
Table	Create Table
t2	CREATE TABLE `t2` (
  `a` int(10) unsigned NOT NULL,
  PRIMARY KEY (`a`)
) ENGINE=InnoDB DEFAULT CHARSET=latin1
/*!50100 PARTITION BY KEY (a)
PARTITIONS 8 */
insert into t2 values (4294967295), (4294967294), (4294967293), (4294967292);
select * from t2;
a
4294967292
4294967293
4294967294
4294967295
select * from t2 where a=4294967293;
a
4294967293
delete from t2 where a=4294967293;
select * from t2;
a
4294967292
4294967294
4294967295
delete from t2;
1024 inserts;
select count(*) from t2;
count(*)
1024
drop table t2;
create table t3 (a int not null, primary key(a)) engine='InnoDB' 
partition by key (a) partitions 7;
show create table t3;
Table	Create Table
t3	CREATE TABLE `t3` (
  `a` int(11) NOT NULL,
  PRIMARY KEY (`a`)
) ENGINE=InnoDB DEFAULT CHARSET=latin1
/*!50100 PARTITION BY KEY (a)
PARTITIONS 7 */
insert into t3 values (2147483647), (2147483646), (2147483645), (2147483644), (-2147483648), (-2147483647), (1), (-1), (0);
select * from t3;
a
-1
-2147483647
-2147483648
0
1
2147483644
2147483645
2147483646
2147483647
select * from t3 where a=2147483645;
a
2147483645
delete from t3 where a=2147483645;
select * from t3;
a
-1
-2147483647
-2147483648
0
1
2147483644
2147483646
2147483647
drop table t3;
