1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
|
set default_storage_engine='tokudb';
drop table if exists tt;
create table tt (a int, b int, c int, primary key(a), key(b), key(c));
insert into tt values (0, 0, 0), (0+1, 0, 0), (0+2, 0, 0), (0+3, 0, 0);
insert into tt values (4, 4, 0), (4+1, 4, 0), (4+2, 4, 0), (4+3, 4, 0);
insert into tt values (8, 8, 0), (8+1, 8, 0), (8+2, 8, 0), (8+3, 8, 0);
insert into tt values (12, 12, 0), (12+1, 12, 0), (12+2, 12, 0), (12+3, 12, 0);
insert into tt values (16, 16, 0), (16+1, 16, 0), (16+2, 16, 0), (16+3, 16, 0);
insert into tt values (20, 20, 0), (20+1, 20, 0), (20+2, 20, 0), (20+3, 20, 0);
insert into tt values (24, 24, 0), (24+1, 24, 0), (24+2, 24, 0), (24+3, 24, 0);
insert into tt values (28, 28, 0), (28+1, 28, 0), (28+2, 28, 0), (28+3, 28, 0);
insert into tt values (32, 32, 0), (32+1, 32, 0), (32+2, 32, 0), (32+3, 32, 0);
insert into tt values (36, 36, 0), (36+1, 36, 0), (36+2, 36, 0), (36+3, 36, 0);
insert into tt values (40, 40, 0), (40+1, 40, 0), (40+2, 40, 0), (40+3, 40, 0);
insert into tt values (44, 44, 0), (44+1, 44, 0), (44+2, 44, 0), (44+3, 44, 0);
insert into tt values (48, 48, 0), (48+1, 48, 0), (48+2, 48, 0), (48+3, 48, 0);
insert into tt values (52, 52, 0), (52+1, 52, 0), (52+2, 52, 0), (52+3, 52, 0);
insert into tt values (56, 56, 0), (56+1, 56, 0), (56+2, 56, 0), (56+3, 56, 0);
insert into tt values (60, 60, 0), (60+1, 60, 0), (60+2, 60, 0), (60+3, 60, 0);
insert into tt values (64, 64, 0), (64+1, 64, 0), (64+2, 64, 0), (64+3, 64, 0);
insert into tt values (68, 68, 0), (68+1, 68, 0), (68+2, 68, 0), (68+3, 68, 0);
insert into tt values (72, 72, 0), (72+1, 72, 0), (72+2, 72, 0), (72+3, 72, 0);
insert into tt values (76, 76, 0), (76+1, 76, 0), (76+2, 76, 0), (76+3, 76, 0);
insert into tt values (80, 80, 0), (80+1, 80, 0), (80+2, 80, 0), (80+3, 80, 0);
insert into tt values (84, 84, 0), (84+1, 84, 0), (84+2, 84, 0), (84+3, 84, 0);
insert into tt values (88, 88, 0), (88+1, 88, 0), (88+2, 88, 0), (88+3, 88, 0);
insert into tt values (92, 92, 0), (92+1, 92, 0), (92+2, 92, 0), (92+3, 92, 0);
insert into tt values (96, 96, 0), (96+1, 96, 0), (96+2, 96, 0), (96+3, 96, 0);
insert into tt values (100, 100, 0), (100+1, 100, 0), (100+2, 100, 0), (100+3, 100, 0);
insert into tt values (104, 104, 0), (104+1, 104, 0), (104+2, 104, 0), (104+3, 104, 0);
insert into tt values (108, 108, 0), (108+1, 108, 0), (108+2, 108, 0), (108+3, 108, 0);
insert into tt values (112, 112, 0), (112+1, 112, 0), (112+2, 112, 0), (112+3, 112, 0);
insert into tt values (116, 116, 0), (116+1, 116, 0), (116+2, 116, 0), (116+3, 116, 0);
insert into tt values (120, 120, 0), (120+1, 120, 0), (120+2, 120, 0), (120+3, 120, 0);
insert into tt values (124, 124, 0), (124+1, 124, 0), (124+2, 124, 0), (124+3, 124, 0);
insert into tt values (128, 128, 0), (128+1, 128, 0), (128+2, 128, 0), (128+3, 128, 0);
insert into tt values (132, 132, 0), (132+1, 132, 0), (132+2, 132, 0), (132+3, 132, 0);
insert into tt values (136, 136, 0), (136+1, 136, 0), (136+2, 136, 0), (136+3, 136, 0);
insert into tt values (140, 140, 0), (140+1, 140, 0), (140+2, 140, 0), (140+3, 140, 0);
insert into tt values (144, 144, 0), (144+1, 144, 0), (144+2, 144, 0), (144+3, 144, 0);
insert into tt values (148, 148, 0), (148+1, 148, 0), (148+2, 148, 0), (148+3, 148, 0);
insert into tt values (152, 152, 0), (152+1, 152, 0), (152+2, 152, 0), (152+3, 152, 0);
insert into tt values (156, 156, 0), (156+1, 156, 0), (156+2, 156, 0), (156+3, 156, 0);
insert into tt values (160, 160, 0), (160+1, 160, 0), (160+2, 160, 0), (160+3, 160, 0);
insert into tt values (164, 164, 0), (164+1, 164, 0), (164+2, 164, 0), (164+3, 164, 0);
insert into tt values (168, 168, 0), (168+1, 168, 0), (168+2, 168, 0), (168+3, 168, 0);
insert into tt values (172, 172, 0), (172+1, 172, 0), (172+2, 172, 0), (172+3, 172, 0);
insert into tt values (176, 176, 0), (176+1, 176, 0), (176+2, 176, 0), (176+3, 176, 0);
insert into tt values (180, 180, 0), (180+1, 180, 0), (180+2, 180, 0), (180+3, 180, 0);
insert into tt values (184, 184, 0), (184+1, 184, 0), (184+2, 184, 0), (184+3, 184, 0);
insert into tt values (188, 188, 0), (188+1, 188, 0), (188+2, 188, 0), (188+3, 188, 0);
insert into tt values (192, 192, 0), (192+1, 192, 0), (192+2, 192, 0), (192+3, 192, 0);
insert into tt values (196, 196, 0), (196+1, 196, 0), (196+2, 196, 0), (196+3, 196, 0);
insert into tt values (200, 200, 0), (200+1, 200, 0), (200+2, 200, 0), (200+3, 200, 0);
insert into tt values (204, 204, 0), (204+1, 204, 0), (204+2, 204, 0), (204+3, 204, 0);
insert into tt values (208, 208, 0), (208+1, 208, 0), (208+2, 208, 0), (208+3, 208, 0);
insert into tt values (212, 212, 0), (212+1, 212, 0), (212+2, 212, 0), (212+3, 212, 0);
insert into tt values (216, 216, 0), (216+1, 216, 0), (216+2, 216, 0), (216+3, 216, 0);
insert into tt values (220, 220, 0), (220+1, 220, 0), (220+2, 220, 0), (220+3, 220, 0);
insert into tt values (224, 224, 0), (224+1, 224, 0), (224+2, 224, 0), (224+3, 224, 0);
insert into tt values (228, 228, 0), (228+1, 228, 0), (228+2, 228, 0), (228+3, 228, 0);
insert into tt values (232, 232, 0), (232+1, 232, 0), (232+2, 232, 0), (232+3, 232, 0);
insert into tt values (236, 236, 0), (236+1, 236, 0), (236+2, 236, 0), (236+3, 236, 0);
insert into tt values (240, 240, 0), (240+1, 240, 0), (240+2, 240, 0), (240+3, 240, 0);
insert into tt values (244, 244, 0), (244+1, 244, 0), (244+2, 244, 0), (244+3, 244, 0);
insert into tt values (248, 248, 0), (248+1, 248, 0), (248+2, 248, 0), (248+3, 248, 0);
insert into tt values (252, 252, 0), (252+1, 252, 0), (252+2, 252, 0), (252+3, 252, 0);
insert into tt values (256, 256, 0), (256+1, 256, 0), (256+2, 256, 0), (256+3, 256, 0);
insert into tt values (260, 260, 0), (260+1, 260, 0), (260+2, 260, 0), (260+3, 260, 0);
insert into tt values (264, 264, 0), (264+1, 264, 0), (264+2, 264, 0), (264+3, 264, 0);
insert into tt values (268, 268, 0), (268+1, 268, 0), (268+2, 268, 0), (268+3, 268, 0);
insert into tt values (272, 272, 0), (272+1, 272, 0), (272+2, 272, 0), (272+3, 272, 0);
insert into tt values (276, 276, 0), (276+1, 276, 0), (276+2, 276, 0), (276+3, 276, 0);
insert into tt values (280, 280, 0), (280+1, 280, 0), (280+2, 280, 0), (280+3, 280, 0);
insert into tt values (284, 284, 0), (284+1, 284, 0), (284+2, 284, 0), (284+3, 284, 0);
insert into tt values (288, 288, 0), (288+1, 288, 0), (288+2, 288, 0), (288+3, 288, 0);
insert into tt values (292, 292, 0), (292+1, 292, 0), (292+2, 292, 0), (292+3, 292, 0);
insert into tt values (296, 296, 0), (296+1, 296, 0), (296+2, 296, 0), (296+3, 296, 0);
insert into tt values (300, 300, 0), (300+1, 300, 0), (300+2, 300, 0), (300+3, 300, 0);
insert into tt values (304, 304, 0), (304+1, 304, 0), (304+2, 304, 0), (304+3, 304, 0);
insert into tt values (308, 308, 0), (308+1, 308, 0), (308+2, 308, 0), (308+3, 308, 0);
insert into tt values (312, 312, 0), (312+1, 312, 0), (312+2, 312, 0), (312+3, 312, 0);
insert into tt values (316, 316, 0), (316+1, 316, 0), (316+2, 316, 0), (316+3, 316, 0);
insert into tt values (320, 320, 0), (320+1, 320, 0), (320+2, 320, 0), (320+3, 320, 0);
insert into tt values (324, 324, 0), (324+1, 324, 0), (324+2, 324, 0), (324+3, 324, 0);
insert into tt values (328, 328, 0), (328+1, 328, 0), (328+2, 328, 0), (328+3, 328, 0);
insert into tt values (332, 332, 0), (332+1, 332, 0), (332+2, 332, 0), (332+3, 332, 0);
insert into tt values (336, 336, 0), (336+1, 336, 0), (336+2, 336, 0), (336+3, 336, 0);
insert into tt values (340, 340, 0), (340+1, 340, 0), (340+2, 340, 0), (340+3, 340, 0);
insert into tt values (344, 344, 0), (344+1, 344, 0), (344+2, 344, 0), (344+3, 344, 0);
insert into tt values (348, 348, 0), (348+1, 348, 0), (348+2, 348, 0), (348+3, 348, 0);
insert into tt values (352, 352, 0), (352+1, 352, 0), (352+2, 352, 0), (352+3, 352, 0);
insert into tt values (356, 356, 0), (356+1, 356, 0), (356+2, 356, 0), (356+3, 356, 0);
insert into tt values (360, 360, 0), (360+1, 360, 0), (360+2, 360, 0), (360+3, 360, 0);
insert into tt values (364, 364, 0), (364+1, 364, 0), (364+2, 364, 0), (364+3, 364, 0);
insert into tt values (368, 368, 0), (368+1, 368, 0), (368+2, 368, 0), (368+3, 368, 0);
insert into tt values (372, 372, 0), (372+1, 372, 0), (372+2, 372, 0), (372+3, 372, 0);
insert into tt values (376, 376, 0), (376+1, 376, 0), (376+2, 376, 0), (376+3, 376, 0);
insert into tt values (380, 380, 0), (380+1, 380, 0), (380+2, 380, 0), (380+3, 380, 0);
insert into tt values (384, 384, 0), (384+1, 384, 0), (384+2, 384, 0), (384+3, 384, 0);
insert into tt values (388, 388, 0), (388+1, 388, 0), (388+2, 388, 0), (388+3, 388, 0);
insert into tt values (392, 392, 0), (392+1, 392, 0), (392+2, 392, 0), (392+3, 392, 0);
insert into tt values (396, 396, 0), (396+1, 396, 0), (396+2, 396, 0), (396+3, 396, 0);
insert into tt values (400, 400, 0), (400+1, 400, 0), (400+2, 400, 0), (400+3, 400, 0);
insert into tt values (404, 404, 0), (404+1, 404, 0), (404+2, 404, 0), (404+3, 404, 0);
insert into tt values (408, 408, 0), (408+1, 408, 0), (408+2, 408, 0), (408+3, 408, 0);
insert into tt values (412, 412, 0), (412+1, 412, 0), (412+2, 412, 0), (412+3, 412, 0);
insert into tt values (416, 416, 0), (416+1, 416, 0), (416+2, 416, 0), (416+3, 416, 0);
insert into tt values (420, 420, 0), (420+1, 420, 0), (420+2, 420, 0), (420+3, 420, 0);
insert into tt values (424, 424, 0), (424+1, 424, 0), (424+2, 424, 0), (424+3, 424, 0);
insert into tt values (428, 428, 0), (428+1, 428, 0), (428+2, 428, 0), (428+3, 428, 0);
insert into tt values (432, 432, 0), (432+1, 432, 0), (432+2, 432, 0), (432+3, 432, 0);
insert into tt values (436, 436, 0), (436+1, 436, 0), (436+2, 436, 0), (436+3, 436, 0);
insert into tt values (440, 440, 0), (440+1, 440, 0), (440+2, 440, 0), (440+3, 440, 0);
insert into tt values (444, 444, 0), (444+1, 444, 0), (444+2, 444, 0), (444+3, 444, 0);
insert into tt values (448, 448, 0), (448+1, 448, 0), (448+2, 448, 0), (448+3, 448, 0);
insert into tt values (452, 452, 0), (452+1, 452, 0), (452+2, 452, 0), (452+3, 452, 0);
insert into tt values (456, 456, 0), (456+1, 456, 0), (456+2, 456, 0), (456+3, 456, 0);
insert into tt values (460, 460, 0), (460+1, 460, 0), (460+2, 460, 0), (460+3, 460, 0);
insert into tt values (464, 464, 0), (464+1, 464, 0), (464+2, 464, 0), (464+3, 464, 0);
insert into tt values (468, 468, 0), (468+1, 468, 0), (468+2, 468, 0), (468+3, 468, 0);
insert into tt values (472, 472, 0), (472+1, 472, 0), (472+2, 472, 0), (472+3, 472, 0);
insert into tt values (476, 476, 0), (476+1, 476, 0), (476+2, 476, 0), (476+3, 476, 0);
insert into tt values (480, 480, 0), (480+1, 480, 0), (480+2, 480, 0), (480+3, 480, 0);
insert into tt values (484, 484, 0), (484+1, 484, 0), (484+2, 484, 0), (484+3, 484, 0);
insert into tt values (488, 488, 0), (488+1, 488, 0), (488+2, 488, 0), (488+3, 488, 0);
insert into tt values (492, 492, 0), (492+1, 492, 0), (492+2, 492, 0), (492+3, 492, 0);
insert into tt values (496, 496, 0), (496+1, 496, 0), (496+2, 496, 0), (496+3, 496, 0);
select count(*) from tt;
count(*)
500
show indexes from tt;
Table Non_unique Key_name Seq_in_index Column_name Collation Cardinality Sub_part Packed Null Index_type Comment Index_comment
tt 0 PRIMARY 1 a A 500 NULL NULL BTREE
tt 1 b 1 b A 500 NULL NULL YES BTREE
tt 1 c 1 c A 500 NULL NULL YES BTREE
analyze table tt;
Table Op Msg_type Msg_text
test.tt analyze status OK
show indexes from tt;
Table Non_unique Key_name Seq_in_index Column_name Collation Cardinality Sub_part Packed Null Index_type Comment Index_comment
tt 0 PRIMARY 1 a A 500 NULL NULL BTREE
tt 1 b 1 b A 250 NULL NULL YES BTREE
tt 1 c 1 c A 2 NULL NULL YES BTREE
alter table tt drop key b;
show indexes from tt;
Table Non_unique Key_name Seq_in_index Column_name Collation Cardinality Sub_part Packed Null Index_type Comment Index_comment
tt 0 PRIMARY 1 a A 500 NULL NULL BTREE
tt 1 c 1 c A 2 NULL NULL YES BTREE
alter table tt drop key c;
show indexes from tt;
Table Non_unique Key_name Seq_in_index Column_name Collation Cardinality Sub_part Packed Null Index_type Comment Index_comment
tt 0 PRIMARY 1 a A 500 NULL NULL BTREE
flush tables;
show indexes from tt;
Table Non_unique Key_name Seq_in_index Column_name Collation Cardinality Sub_part Packed Null Index_type Comment Index_comment
tt 0 PRIMARY 1 a A 500 NULL NULL BTREE
drop table tt;
|
