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
|
--source include/have_xtradb.inc
connect (con1,localhost,root,,);
connect (con2,localhost,root,,);
connect (con3,localhost,root,,);
--echo # Drop test table
--disable_warnings
drop table if exists t;
--enable_warnings
--echo # Create test table
create table t(a INT PRIMARY KEY, b INT) engine=InnoDB;
--echo # Insert two rows to test table
insert into t values(2,1);
insert into t values(1,2);
#--echo # Save current deadlock count
let $current = `SELECT VARIABLE_VALUE FROM INFORMATION_SCHEMA.GLOBAL_STATUS WHERE VARIABLE_NAME = 'Innodb_deadlocks'`;
--disable_result_log
connection con1;
BEGIN; SELECT b FROM t WHERE a=1 FOR UPDATE;
connection con2;
BEGIN; SELECT b FROM t WHERE a=2 FOR UPDATE;
connection con1;
SEND SELECT b FROM t WHERE a=2 FOR UPDATE;
connection con2;
SEND SELECT b FROM t WHERE a=1 FOR UPDATE;
connection con1;
--error 0, ER_LOCK_DEADLOCK
reap;
ROLLBACK;
connection con2;
--error 0, ER_LOCK_DEADLOCK
reap;
ROLLBACK;
connection con3;
let $result = `SELECT VARIABLE_VALUE FROM INFORMATION_SCHEMA.GLOBAL_STATUS WHERE VARIABLE_NAME = 'Innodb_deadlocks'`;
--enable_result_log
let $diff = `SELECT $result - $current`;
echo Deadlocks: $diff;
--echo # Drop test table
drop table t;
|
