mirror of
https://github.com/MariaDB/server.git
synced 2025-07-22 19:25:00 +02:00
38 lines
1.1 KiB
Text
38 lines
1.1 KiB
Text
SET DEFAULT_STORAGE_ENGINE = 'tokudb';
|
|
DROP TABLE IF EXISTS foo;
|
|
create table foo (a int, b int, c int, primary key (a), key (b) clustering=yes);
|
|
replace into foo values (1,10,100), (2,20,200), (1,10,1000);
|
|
explain select * from foo;
|
|
id select_type table type possible_keys key key_len ref rows Extra
|
|
1 SIMPLE foo index NULL b 5 NULL 2 Using index
|
|
select * from foo;
|
|
a b c
|
|
1 10 1000
|
|
2 20 200
|
|
explain select * from foo order by b desc;
|
|
id select_type table type possible_keys key key_len ref rows Extra
|
|
1 SIMPLE foo index NULL b 5 NULL 2 Using index
|
|
select * from foo order by b desc;
|
|
a b c
|
|
2 20 200
|
|
1 10 1000
|
|
insert ignore into foo values (3,30,300), (1,10,1);
|
|
Warnings:
|
|
Warning 1062 Duplicate entry '1' for key 'PRIMARY'
|
|
explain select * from foo;
|
|
id select_type table type possible_keys key key_len ref rows Extra
|
|
1 SIMPLE foo index NULL b 5 NULL 3 Using index
|
|
select * from foo;
|
|
a b c
|
|
1 10 1000
|
|
2 20 200
|
|
3 30 300
|
|
explain select * from foo order by b desc;
|
|
id select_type table type possible_keys key key_len ref rows Extra
|
|
1 SIMPLE foo index NULL b 5 NULL 3 Using index
|
|
select * from foo order by b desc;
|
|
a b c
|
|
3 30 300
|
|
2 20 200
|
|
1 10 1000
|
|
drop table foo;
|