mirror of
https://github.com/MariaDB/server.git
synced 2025-01-31 02:51:44 +01:00
80 lines
1.8 KiB
Text
80 lines
1.8 KiB
Text
|
drop table if exists t1,t3;
|
||
|
|
#
|
||
|
|
# MDEV-20611: MRR scan over partitioned InnoDB table produces "Out of memory" error
|
||
|
|
#
|
||
|
|
create table t1(a int);
|
||
|
|
insert into t1 values (0),(1),(2),(3),(4),(5),(6),(7),(8),(9);
|
||
|
|
set @tmp=@@storage_engine;
|
||
|
|
set storage_engine=myisam;
|
||
|
|
create table t3 (
|
||
|
|
ID bigint(20) NOT NULL AUTO_INCREMENT,
|
||
|
|
part_id int,
|
||
|
|
key_col int,
|
||
|
|
col2 int,
|
||
|
|
key(key_col),
|
||
|
|
PRIMARY KEY (ID,part_id)
|
||
|
|
) PARTITION BY RANGE (part_id)
|
||
|
|
(PARTITION p1 VALUES LESS THAN (3),
|
||
|
|
PARTITION p2 VALUES LESS THAN (7),
|
||
|
|
PARTITION p3 VALUES LESS THAN (10)
|
||
|
|
);
|
||
|
|
show create table t3;
|
||
|
|
Table Create Table
|
||
|
|
t3 CREATE TABLE `t3` (
|
||
|
|
`ID` bigint(20) NOT NULL AUTO_INCREMENT,
|
||
|
|
`part_id` int(11) NOT NULL,
|
||
|
|
`key_col` int(11) DEFAULT NULL,
|
||
|
|
`col2` int(11) DEFAULT NULL,
|
||
|
|
PRIMARY KEY (`ID`,`part_id`),
|
||
|
|
KEY `key_col` (`key_col`)
|
||
|
|
) ENGINE=MyISAM DEFAULT CHARSET=latin1
|
||
|
|
PARTITION BY RANGE (`part_id`)
|
||
|
|
(PARTITION `p1` VALUES LESS THAN (3) ENGINE = MyISAM,
|
||
|
|
PARTITION `p2` VALUES LESS THAN (7) ENGINE = MyISAM,
|
||
|
|
PARTITION `p3` VALUES LESS THAN (10) ENGINE = MyISAM)
|
||
|
|
set storage_engine= @tmp;
|
||
|
|
insert into t3 select
|
||
|
|
A.a+10*B.a,
|
||
|
|
A.a,
|
||
|
|
B.a,
|
||
|
|
123456
|
||
|
|
from t1 A, t1 B;
|
||
|
|
set optimizer_switch='mrr=on';
|
||
|
|
explain
|
||
|
|
select * from t3 force index (key_col) where key_col < 3;
|
||
|
|
id select_type table type possible_keys key key_len ref rows Extra
|
||
|
|
1 SIMPLE t3 range key_col key_col 5 NULL # Using where; Rowid-ordered scan
|
||
|
|
select * from t3 force index (key_col) where key_col < 3;
|
||
|
|
ID part_id key_col col2
|
||
|
|
1 0 0 123456
|
||
|
|
1 1 0 123456
|
||
|
|
2 2 0 123456
|
||
|
|
10 0 1 123456
|
||
|
|
11 1 1 123456
|
||
|
|
12 2 1 123456
|
||
|
|
20 0 2 123456
|
||
|
|
21 1 2 123456
|
||
|
|
22 2 2 123456
|
||
|
|
3 3 0 123456
|
||
|
|
4 4 0 123456
|
||
|
|
5 5 0 123456
|
||
|
|
6 6 0 123456
|
||
|
|
13 3 1 123456
|
||
|
|
14 4 1 123456
|
||
|
|
15 5 1 123456
|
||
|
|
16 6 1 123456
|
||
|
|
23 3 2 123456
|
||
|
|
24 4 2 123456
|
||
|
|
25 5 2 123456
|
||
|
|
26 6 2 123456
|
||
|
|
7 7 0 123456
|
||
|
|
8 8 0 123456
|
||
|
|
9 9 0 123456
|
||
|
|
17 7 1 123456
|
||
|
|
18 8 1 123456
|
||
|
|
19 9 1 123456
|
||
|
|
27 7 2 123456
|
||
|
|
28 8 2 123456
|
||
|
|
29 9 2 123456
|
||
|
|
drop table t1,t3;
|