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
|
# This test covers various aspects of PBXT locking mechanism, including
# internal permanent/temporary row locking and MySQL locking
# SHOW PROCESSLIST has hardcoded "Writing to net" as state.
-- source include/not_embedded.inc
# TEST: select for update test
drop table if exists t1;
create table t1 (id int, index (id)) engine = pbxt;
insert into t1 values (1), (2), (3), (4), (5);
begin;
select * from t1 where id < 5 for update;
connect (con1,localhost,root,,);
connection con1;
# this shouldn't lock
# note this implies usage of the index, table scan will block
update t1 set id = 8 where id = 5;
# this should block
send update t1 set id = 8 where id = 4;
connection default;
sleep 1;
replace_column 1 x 3 x 6 x;
show processlist;
commit;
connection con1;
reap;
select * from t1;
# TEST: make sure no unneeded temporary locks are set
connection default;
drop table if exists t1;
# notice absence of index
create table t1 (id int) engine = pbxt;
insert into t1 values (1), (2), (3), (4), (5);
begin;
# after this statement all rows should be unlocked
select * from t1 where id > 10 for update;
connection con1;
# this shouldn't block
update t1 set id = 8;
connection default;
commit;
select * from t1;
# TEST: last row temp->perm locking
connection default;
drop table if exists t1;
create table t1 (id int, index (id)) engine = pbxt;
insert into t1 values (1), (2), (3), (4), (5);
begin;
select * from t1 where id = 5 for update;
connection con1;
update t1 set id = 8 where id < 4;
# this should block
send update t1 set id = 8 where id = 5;
connection default;
sleep 1;
replace_column 1 x 3 x 6 x;
show processlist;
commit;
connection con1;
reap;
connection default;
select * from t1;
# TEST: select for update in auto-commit mode
# although this is not a widely used case in practice, make sure it operates correctly
connection default;
drop table if exists t1;
create table t1 (id int, index (id)) engine = pbxt;
insert into t1 values (1), (2), (3), (4), (5);
# auto-commit mode - should unlock immediately
select * from t1 for update;
connection con1;
# this shouldn't block
update t1 set id = 8;
# TEST: same as before but from a stored routine
connection default;
drop table if exists t1;
create table t1 (id int, index (id)) engine = pbxt;
insert into t1 values (1), (2), (3), (4), (5);
delimiter |;
create procedure p1 ()
begin
select * from t1 for update;
end|
delimiter ;|
call p1 ();
connection con1;
# this shouldn't block
update t1 set id = 8;
--disable_query_log
drop procedure p1;
drop table t1;
drop database pbxt;
--enable_query_log
|
