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
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
|
#
# wl#9383 INNODB: ADD AN OPTION TO TURN OFF/ON DEADLOCK CHECKER
#
--source include/have_innodb.inc
--source include/count_sessions.inc
let $have_deadlock=`select @@GLOBAL.innodb_deadlock_detect`;
connection default;
CREATE TABLE t1(
id INT,
PRIMARY KEY(id)
) ENGINE=InnoDB;
INSERT INTO t1 VALUES(1), (2), (3);
# We are not interested query results, only errors
--disable_result_log
BEGIN;
SELECT * FROM t1 WHERE id = 1 LOCK IN SHARE MODE;
connect (con1,localhost,root,,);
BEGIN;
SELECT * FROM t1 WHERE id = 2 LOCK IN SHARE MODE;
connect (con2,localhost,root,,);
BEGIN;
SELECT * FROM t1 WHERE id = 2 LOCK IN SHARE MODE;
send SELECT * FROM t1 WHERE id = 1 FOR UPDATE;
connection default;
send SELECT * FROM t1 WHERE id = 2 FOR UPDATE;
connection con2;
if (!$have_deadlock) {
--error ER_LOCK_WAIT_TIMEOUT
reap;
disconnect con1;
}
if ($have_deadlock) {
connection con1;
COMMIT;
disconnect con1;
connection con2;
--error 0,ER_LOCK_DEADLOCK,ER_LOCK_WAIT_TIMEOUT
reap;
}
ROLLBACK;
disconnect con2;
#
# Note here that con1 is the older transaction as it
# query started wait first. Thus, con1 gets lock
# wait timeout first. There is possibility that
# default connection gets lock timeout also or
# as con1 is rolled back it gets the locks it waited
# and does the update.
#
connection default;
if (!$have_deadlock) {
--error 0,ER_LOCK_WAIT_TIMEOUT
reap;
}
if ($have_deadlock) {
--error 0,ER_LOCK_DEADLOCK
reap;
}
ROLLBACK;
--enable_result_log
DROP TABLE t1;
--source include/wait_until_count_sessions.inc
|
