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
|
SET DEFAULT_STORAGE_ENGINE='tokudb';
*** Bug #22169 ***
DROP TABLE IF EXISTS t1;
CREATE TABLE t1 (a int, b int, c int, z int, y int, x int, r int, s int, t int, primary key (a,b), key (z), key(x), key(t));
id select_type table type possible_keys key key_len ref rows Extra
1 SIMPLE t1 NULL foo foo NULL NULL NULL; Using where; Using index
c r
0 20
2 18
4 16
6 14
8 12
10 10
12 8
14 6
16 4
18 2
id select_type table type possible_keys key key_len ref rows Extra
1 SIMPLE t1 NULL foo foo NULL NULL NULL; Using where; Using index
c r a b
0 20 10 0
2 18 9 1
4 16 8 2
6 14 7 3
8 12 6 4
10 10 5 5
12 8 4 6
14 6 3 7
16 4 2 8
18 2 1 9
id select_type table type possible_keys key key_len ref rows Extra
1 SIMPLE t1 NULL NULL NULL NULL NULL NULL;
a b c z y x r s t
1 9 18 10 100 1000 2 3 4
2 8 16 20 200 2000 4 6 8
3 7 14 30 300 3000 6 9 12
4 6 12 40 400 4000 8 12 16
5 5 10 50 500 5000 10 15 20
6 4 8 60 600 6000 12 18 24
7 3 6 70 700 7000 14 21 28
8 2 4 80 800 8000 16 24 32
9 1 2 90 900 9000 18 27 36
10 0 0 100 1000 10000 20 30 40
|
