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
|
create table t1 (a int, b int, c text, key (a) clustering=yes, key (b)) engine=tokudb;
show create table t1;
Table Create Table
t1 CREATE TABLE `t1` (
`a` int(11) DEFAULT NULL,
`b` int(11) DEFAULT NULL,
`c` text,
KEY `a` (`a`) `clustering`=yes,
KEY `b` (`b`)
) ENGINE=TokuDB DEFAULT CHARSET=latin1 `compression`='tokudb_zlib'
insert t1 values (1, 1, 1);
insert t1 select a+1, a+1, a+1 from t1;
insert t1 select a+2, a+2, a+2 from t1;
insert t1 select a+4, a+4, a+4 from t1;
select * from t1;
a b c
1 1 1
2 2 2
3 3 3
4 4 4
5 5 5
6 6 6
7 7 7
8 8 8
explain select a,c from t1 where a > 2;
id select_type table type possible_keys key key_len ref rows Extra
1 SIMPLE t1 range a a 5 NULL 6 Using where; Using index
explain select b,c from t1 where b > 2;
id select_type table type possible_keys key key_len ref rows Extra
1 SIMPLE t1 ALL b NULL NULL NULL 8 Using where
drop table t1;
|
