create table t1 (a bigint unsigned not null, primary key(a)) engine='MYISAM' 
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` bigint(20) unsigned NOT NULL,
  PRIMARY KEY (`a`)
) ENGINE=MyISAM DEFAULT CHARSET=latin1
 PARTITION BY KEY (`a`)
(PARTITION `pa1` MAX_ROWS = 20 MIN_ROWS = 2 ENGINE = MyISAM,
 PARTITION `pa2` MAX_ROWS = 30 MIN_ROWS = 3 ENGINE = MyISAM,
 PARTITION `pa3` MAX_ROWS = 30 MIN_ROWS = 4 ENGINE = MyISAM,
 PARTITION `pa4` MAX_ROWS = 40 MIN_ROWS = 2 ENGINE = MyISAM)
insert into t1 values (18446744073709551615), (0xFFFFFFFFFFFFFFFE), (18446744073709551613), (18446744073709551612), (1), (2), (65535);
select * from t1;
a
1
18446744073709551612
18446744073709551613
18446744073709551614
18446744073709551615
2
65535
select * from t1 where a=-2;
a
delete from t1 where a=-2;
select * from t1;
a
1
18446744073709551612
18446744073709551613
18446744073709551614
18446744073709551615
2
65535
select * from t1 where a=18446744073709551615;
a
18446744073709551615
delete from t1 where a=18446744073709551615;
select * from t1;
a
1
18446744073709551612
18446744073709551613
18446744073709551614
2
65535
drop table t1;
create table t2 (a bigint unsigned not null, primary key(a)) engine='MYISAM' 
partition by key (a) partitions 8;
show create table t2;
Table	Create Table
t2	CREATE TABLE `t2` (
  `a` bigint(20) unsigned NOT NULL,
  PRIMARY KEY (`a`)
) ENGINE=MyISAM DEFAULT CHARSET=latin1
 PARTITION BY KEY (`a`)
PARTITIONS 8
insert into t2 values (18446744073709551615), (0xFFFFFFFFFFFFFFFE), (18446744073709551613), (18446744073709551612);
select * from t2;
a
18446744073709551612
18446744073709551613
18446744073709551614
18446744073709551615
select * from t2 where a=18446744073709551615;
a
18446744073709551615
delete from t2 where a=18446744073709551615;
select * from t2;
a
18446744073709551612
18446744073709551613
18446744073709551614
delete from t2;
65535 inserts;
select count(*) from t2;
count(*)
65535
drop table t2;
create table t3 (a bigint not null, primary key(a)) engine='MYISAM' 
partition by key (a) partitions 7;
show create table t3;
Table	Create Table
t3	CREATE TABLE `t3` (
  `a` bigint(20) NOT NULL,
  PRIMARY KEY (`a`)
) ENGINE=MyISAM DEFAULT CHARSET=latin1
 PARTITION BY KEY (`a`)
PARTITIONS 7
insert into t3 values (9223372036854775807), (9223372036854775806), (9223372036854775805), (9223372036854775804), (-9223372036854775808), (-9223372036854775807), (1), (-1), (0);
select * from t3;
a
-1
-9223372036854775807
-9223372036854775808
0
1
9223372036854775804
9223372036854775805
9223372036854775806
9223372036854775807
select * from t3 where a=9223372036854775806;
a
9223372036854775806
delete from t3 where a=9223372036854775806;
select * from t3;
a
-1
-9223372036854775807
-9223372036854775808
0
1
9223372036854775804
9223372036854775805
9223372036854775807
drop table t3;