SET @max_row = 20;
drop table if exists t1;
create table t1 (a bit(65), primary key (a)) engine='MyISAM' partition by key (a);
ERROR 42000: Display width out of range for 'a' (max = 64)
create table t1 (a bit(0), primary key (a)) engine='MyISAM' partition by key (a);
show create table t1;
Table	Create Table
t1	CREATE TABLE `t1` (
  `a` bit(1) NOT NULL,
  PRIMARY KEY (`a`)
) ENGINE=MyISAM DEFAULT CHARSET=latin1 COLLATE=latin1_swedish_ci
 PARTITION BY KEY (`a`)
drop table t1;
create table t1 (a bit(0), primary key (a)) engine='MyISAM' 
partition by key (a) (
partition pa1,
partition pa2);
show create table t1;
Table	Create Table
t1	CREATE TABLE `t1` (
  `a` bit(1) NOT NULL,
  PRIMARY KEY (`a`)
) ENGINE=MyISAM DEFAULT CHARSET=latin1 COLLATE=latin1_swedish_ci
 PARTITION BY KEY (`a`)
(PARTITION `pa1` ENGINE = MyISAM,
 PARTITION `pa2` ENGINE = MyISAM)
drop table t1;
create table t1 (a bit(64), primary key (a)) engine='MyISAM' 
partition by key (a) partitions 2;
show create table t1;
Table	Create Table
t1	CREATE TABLE `t1` (
  `a` bit(64) NOT NULL,
  PRIMARY KEY (`a`)
) ENGINE=MyISAM DEFAULT CHARSET=latin1 COLLATE=latin1_swedish_ci
 PARTITION BY KEY (`a`)
PARTITIONS 2
insert into t1 values 
(b'1111111111111111111111111111111111111111111111111111111111111111'),
(b'1000000000000000000000000000000000000000000000000000000000000000'),
(b'0000000000000000000000000000000000000000000000000000000000000001'),
(b'1010101010101010101010101010101010101010101010101010101010101010'),
(b'0101010101010101010101010101010101010101010101010101010101010101');
select hex(a) from t1;
hex(a)
1
5555555555555555
8000000000000000
AAAAAAAAAAAAAAAA
FFFFFFFFFFFFFFFF
drop table t1;
create table t1 (a bit(64), 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` bit(64) NOT NULL,
  PRIMARY KEY (`a`)
) ENGINE=MyISAM DEFAULT CHARSET=latin1 COLLATE=latin1_swedish_ci
 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 
(b'1111111111111111111111111111111111111111111111111111111111111111'),
(b'1000000000000000000000000000000000000000000000000000000000000000'),
(b'0000000000000000000000000000000000000000000000000000000000000001'),
(b'1010101010101010101010101010101010101010101010101010101010101010'),
(b'0101010101010101010101010101010101010101010101010101010101010101');
select hex(a) from t1 where a=b'0101010101010101010101010101010101010101010101010101010101010101';
hex(a)
5555555555555555
delete from t1 where a=b'0101010101010101010101010101010101010101010101010101010101010101';
select hex(a) from t1;
hex(a)
1
8000000000000000
AAAAAAAAAAAAAAAA
FFFFFFFFFFFFFFFF
drop table t1;
create table t2 (a bit, primary key (a)) engine='MyISAM' 
partition by key (a) partitions 4;
show create table t2;
Table	Create Table
t2	CREATE TABLE `t2` (
  `a` bit(1) NOT NULL,
  PRIMARY KEY (`a`)
) ENGINE=MyISAM DEFAULT CHARSET=latin1 COLLATE=latin1_swedish_ci
 PARTITION BY KEY (`a`)
PARTITIONS 4
insert into t2 values (b'0'), (b'1');
select hex(a) from t2;
hex(a)
0
1
alter table t2 drop primary key;
show create table t2;
Table	Create Table
t2	CREATE TABLE `t2` (
  `a` bit(1) NOT NULL
) ENGINE=MyISAM DEFAULT CHARSET=latin1 COLLATE=latin1_swedish_ci
 PARTITION BY KEY (`a`)
PARTITIONS 4
select hex(a) from t2;
hex(a)
0
1
alter table t2 add primary key (a);
show create table t2;
Table	Create Table
t2	CREATE TABLE `t2` (
  `a` bit(1) NOT NULL,
  PRIMARY KEY (`a`)
) ENGINE=MyISAM DEFAULT CHARSET=latin1 COLLATE=latin1_swedish_ci
 PARTITION BY KEY (`a`)
PARTITIONS 4
select hex(a) from t2;
hex(a)
0
1
drop table t2;
create table t3 (a bit(8), primary key (a)) engine='MyISAM' 
partition by range (a) subpartition by key (a) subpartitions 2 (
partition pa1 values less than (3),
partition pa2 values less than (16),
partition pa3 values less than (64),
partition pa4 values less than (256));
show create table t3;
Table	Create Table
t3	CREATE TABLE `t3` (
  `a` bit(8) NOT NULL,
  PRIMARY KEY (`a`)
) ENGINE=MyISAM DEFAULT CHARSET=latin1 COLLATE=latin1_swedish_ci
 PARTITION BY RANGE (`a`)
SUBPARTITION BY KEY (`a`)
SUBPARTITIONS 2
(PARTITION `pa1` VALUES LESS THAN (3) ENGINE = MyISAM,
 PARTITION `pa2` VALUES LESS THAN (16) ENGINE = MyISAM,
 PARTITION `pa3` VALUES LESS THAN (64) ENGINE = MyISAM,
 PARTITION `pa4` VALUES LESS THAN (256) ENGINE = MyISAM)
255 inserts;
select hex(a) from t3 where a=b'01010101';
hex(a)
55
delete from t3 where a=b'01010101';
select count(*) from t3;
count(*)
254
select hex(a) from t3;
hex(a)
1
10
11
12
13
14
15
16
17
18
19
1A
1B
1C
1D
1E
1F
2
20
21
22
23
24
25
26
27
28
29
2A
2B
2C
2D
2E
2F
3
30
31
32
33
34
35
36
37
38
39
3A
3B
3C
3D
3E
3F
4
40
41
42
43
44
45
46
47
48
49
4A
4B
4C
4D
4E
4F
5
50
51
52
53
54
56
57
58
59
5A
5B
5C
5D
5E
5F
6
60
61
62
63
64
65
66
67
68
69
6A
6B
6C
6D
6E
6F
7
70
71
72
73
74
75
76
77
78
79
7A
7B
7C
7D
7E
7F
8
80
81
82
83
84
85
86
87
88
89
8A
8B
8C
8D
8E
8F
9
90
91
92
93
94
95
96
97
98
99
9A
9B
9C
9D
9E
9F
A
A0
A1
A2
A3
A4
A5
A6
A7
A8
A9
AA
AB
AC
AD
AE
AF
B
B0
B1
B2
B3
B4
B5
B6
B7
B8
B9
BA
BB
BC
BD
BE
BF
C
C0
C1
C2
C3
C4
C5
C6
C7
C8
C9
CA
CB
CC
CD
CE
CF
D
D0
D1
D2
D3
D4
D5
D6
D7
D8
D9
DA
DB
DC
DD
DE
DF
E
E0
E1
E2
E3
E4
E5
E6
E7
E8
E9
EA
EB
EC
ED
EE
EF
F
F0
F1
F2
F3
F4
F5
F6
F7
F8
F9
FA
FB
FC
FD
FE
FF
drop table t3;
create table t4 (a bit(8), primary key (a)) engine='MyISAM' 
partition by list (a) subpartition by key (a) subpartitions 2 (
partition pa1 values in (0,1,2,3),
partition pa2 values in (4,5,6,7,8,9,10,11,12,13,14,15,16),
partition pa3 values in (17,18,19,20,21,22,23,24,25,26,27,28,29,30,31,32));
show create table t4;
Table	Create Table
t4	CREATE TABLE `t4` (
  `a` bit(8) NOT NULL,
  PRIMARY KEY (`a`)
) ENGINE=MyISAM DEFAULT CHARSET=latin1 COLLATE=latin1_swedish_ci
 PARTITION BY LIST (`a`)
SUBPARTITION BY KEY (`a`)
SUBPARTITIONS 2
(PARTITION `pa1` VALUES IN (0,1,2,3) ENGINE = MyISAM,
 PARTITION `pa2` VALUES IN (4,5,6,7,8,9,10,11,12,13,14,15,16) ENGINE = MyISAM,
 PARTITION `pa3` VALUES IN (17,18,19,20,21,22,23,24,25,26,27,28,29,30,31,32) ENGINE = MyISAM)
32 inserts;
select hex(a) from t4 where a=b'00000001';
hex(a)
1
delete from t4 where a=b'00000001';
select count(*) from t4;
count(*)
31
select hex(a) from t4;
hex(a)
10
11
12
13
14
15
16
17
18
19
1A
1B
1C
1D
1E
1F
2
20
3
4
5
6
7
8
9
A
B
C
D
E
F
drop table t4;