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
|
#
# INSERT LOW_PRIORITY
#
--source have_engine.inc
--source include/count_sessions.inc
--enable_connect_log
--disable_warnings
DROP TABLE IF EXISTS t1;
--enable_warnings
# We will be changing the GLOBAL value of low_priority_updates
# due to bug#64892
# (Session-level low_priority_updates does not work for INSERT)
SET @low_prio_updates = @@global.low_priority_updates;
# Concurrent insert might interfere
# with HIGH|LOW_PRIORITY logic
SET @concur_insert = @@global.concurrent_insert;
SET GLOBAL concurrent_insert = NEVER;
--source create_table.inc
INSERT INTO t1 (a,b) VALUES (1,'f'),(2,'b');
# We will have 3 connections:
# con1 will start SELECT which should give us enough time;
# con0 will run INSERT
# con2 will then start another SELECT.
# With INSERT LOW_PRIORITY we should see only old rows in both resultsets.
--connect (con0,localhost,root,,)
SET lock_wait_timeout = 4;
--connect (con1,localhost,root,,)
SET lock_wait_timeout = 4;
--connect (con2,localhost,root,,)
SET lock_wait_timeout = 4;
--connection con1
--send
SELECT SLEEP(1) FROM t1;
--connection con0
let $show_statement = SHOW PROCESSLIST;
let $field = State;
let $condition = = 'User sleep';
# We don't need to wait long,
# thread should show up in the processlist right away
let $wait_timeout = 2;
--source include/wait_show_condition.inc
--send
INSERT LOW_PRIORITY INTO t1 (a,b) VALUES (3,'z');
--connection con2
let $condition = = 'Waiting for table level lock';
let $wait_timeout = 2;
--source include/wait_show_condition.inc
if (!$found)
{
--let $mysql_errname = timeout in wait_show_condition
--let $functionality = INSERT LOW_PRIORITY or table locking
--source unexpected_result.inc
}
if ($found)
{
--echo # Should return only 2 rows
SELECT SLEEP(1) FROM t1;
}
--connection con1
--reap
--connection con0
--reap
--sorted_result
SELECT * FROM t1;
--disconnect con0
--disconnect con1
--disconnect con2
--connection default
SET GLOBAL low_priority_updates = @low_prio_updates;
SET GLOBAL concurrent_insert = @concur_insert;
# Cleanup
DROP TABLE t1;
--source include/wait_until_count_sessions.inc
--source cleanup_engine.inc
|
