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
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
|
SET @save_timeout = @@GLOBAL.innodb_lock_wait_timeout;
SET GLOBAL innodb_lock_wait_timeout = 1;
SET @save_isolation = @@GLOBAL.tx_isolation;
SET GLOBAL TRANSACTION ISOLATION LEVEL READ COMMITTED;
drop table if exists t1,t2,t3,t4,t5,t6,t7,t8,t9,t10;
create table t1 (id int not null, f_id int not null, f int not null,
primary key(f_id, id)) engine = InnoDB;
create table t2 (id int not null,s_id int not null,s varchar(200),
primary key(id)) engine = InnoDB;
INSERT INTO t1 VALUES (8, 1, 3);
INSERT INTO t1 VALUES (1, 2, 1);
INSERT INTO t2 VALUES (1, 0, '');
INSERT INTO t2 VALUES (8, 1, '');
commit;
DELETE ml.* FROM t1 AS ml LEFT JOIN t2 AS mm ON (mm.id=ml.id)
WHERE mm.id IS NULL;
select ml.* from t1 as ml left join t2 as mm on (mm.id=ml.id)
where mm.id is null lock in share mode;
id f_id f
drop table t1,t2;
connect a,localhost,root,,;
connect b,localhost,root,,;
connection a;
create table t1(a int not null, b int, primary key(a)) engine = InnoDB;
insert into t1 values(1,1),(2,2),(3,1),(4,2),(5,1),(6,2),(7,3);
commit;
set autocommit = 0;
select * from t1 lock in share mode;
a b
1 1
2 2
3 1
4 2
5 1
6 2
7 3
update t1 set b = 5 where b = 1;
connection b;
set autocommit = 0;
select * from t1 where a = 2 and b = 2 for update;
ERROR HY000: Lock wait timeout exceeded; try restarting transaction
connection a;
commit;
connection b;
commit;
drop table t1;
connection default;
disconnect a;
disconnect b;
connect a,localhost,root,,;
connect b,localhost,root,,;
connection a;
create table t1(a int not null, b int, primary key(a)) engine = InnoDB;
insert into t1 values(1,1),(2,2),(3,1),(4,2),(5,1),(6,2),(7,3);
commit;
set autocommit = 0;
update t1 set b = 5 where b = 1;
connection b;
set autocommit = 0;
select * from t1 where a = 7 and b = 3 for update;
a b
7 3
commit;
connection a;
commit;
drop table t1;
connection default;
disconnect a;
disconnect b;
connect a,localhost,root,,;
connect b,localhost,root,,;
connection a;
create table t1(a int not null, b int, primary key(a)) engine = InnoDB;
insert into t1 values (1,2),(5,3),(4,2);
create table t2(d int not null, e int, primary key(d)) engine = InnoDB;
insert into t2 values (8,6),(12,1),(3,1);
commit;
set autocommit = 0;
select * from t2 for update;
d e
3 1
8 6
12 1
connection b;
set autocommit = 0;
insert into t1 select * from t2;
update t1 set b = (select e from t2 where a = d);
create table t3(d int not null, e int, primary key(d)) engine = InnoDB
select * from t2;
commit;
connection a;
commit;
connection default;
disconnect a;
disconnect b;
drop table t1, t2, t3;
connect a,localhost,root,,;
connect b,localhost,root,,;
connect c,localhost,root,,;
connect d,localhost,root,,;
SET SESSION DEFAULT_STORAGE_ENGINE = InnoDB;
connect e,localhost,root,,;
connect f,localhost,root,,;
connect g,localhost,root,,;
SET SESSION DEFAULT_STORAGE_ENGINE = InnoDB;
connect h,localhost,root,,;
connect i,localhost,root,,;
connect j,localhost,root,,;
SET SESSION DEFAULT_STORAGE_ENGINE = InnoDB;
connection a;
create table t1(a int not null, b int, primary key(a)) engine = InnoDB;
insert into t1 values (1,2),(5,3),(4,2);
create table t2(a int not null, b int, primary key(a)) engine = InnoDB;
insert into t2 values (8,6),(12,1),(3,1);
create table t3(d int not null, b int, primary key(d)) engine = InnoDB;
insert into t3 values (8,6),(12,1),(3,1);
create table t5(a int not null, b int, primary key(a)) engine = InnoDB;
insert into t5 values (1,2),(5,3),(4,2);
create table t6(d int not null, e int, primary key(d)) engine = InnoDB;
insert into t6 values (8,6),(12,1),(3,1);
create table t8(a int not null, b int, primary key(a)) engine = InnoDB;
insert into t8 values (1,2),(5,3),(4,2);
create table t9(d int not null, e int, primary key(d)) engine = InnoDB;
insert into t9 values (8,6),(12,1),(3,1);
commit;
set autocommit = 0;
select * from t2 for update;
a b
3 1
8 6
12 1
connection b;
set autocommit = 0;
SET SESSION TRANSACTION ISOLATION LEVEL SERIALIZABLE;
insert into t1 select * from t2;
connection c;
set autocommit = 0;
SET SESSION TRANSACTION ISOLATION LEVEL SERIALIZABLE;
update t3 set b = (select b from t2 where a = d);
connection d;
set autocommit = 0;
SET SESSION TRANSACTION ISOLATION LEVEL SERIALIZABLE;
create table t4(a int not null, b int, primary key(a)) select * from t2;
connection e;
set autocommit = 0;
insert into t5 (select * from t2 lock in share mode);
connection f;
set autocommit = 0;
update t6 set e = (select b from t2 where a = d lock in share mode);
connection g;
set autocommit = 0;
create table t7(a int not null, b int, primary key(a)) select * from t2 lock in share mode;
connection h;
set autocommit = 0;
insert into t8 (select * from t2 for update);
connection i;
set autocommit = 0;
update t9 set e = (select b from t2 where a = d for update);
connection j;
set autocommit = 0;
create table t10(a int not null, b int, primary key(a)) select * from t2 for update;
connection b;
ERROR HY000: Lock wait timeout exceeded; try restarting transaction
connection c;
ERROR HY000: Lock wait timeout exceeded; try restarting transaction
connection d;
ERROR HY000: Lock wait timeout exceeded; try restarting transaction
connection e;
ERROR HY000: Lock wait timeout exceeded; try restarting transaction
connection f;
ERROR HY000: Lock wait timeout exceeded; try restarting transaction
connection g;
ERROR HY000: Lock wait timeout exceeded; try restarting transaction
connection h;
ERROR HY000: Lock wait timeout exceeded; try restarting transaction
connection i;
ERROR HY000: Lock wait timeout exceeded; try restarting transaction
connection j;
ERROR HY000: Lock wait timeout exceeded; try restarting transaction
connection a;
commit;
connection default;
disconnect a;
disconnect b;
disconnect c;
disconnect d;
disconnect e;
disconnect f;
disconnect g;
disconnect h;
disconnect i;
disconnect j;
drop table t1, t2, t3, t5, t6, t8, t9;
SET GLOBAL innodb_lock_wait_timeout = @save_timeout;
SET GLOBAL tx_isolation = @save_isolation;
|
