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
|
#
# 2011-08-01 Added
#
--source include/have_innodb.inc
SET @start_global_value = @@global.innodb_rollback_segments;
SELECT @start_global_value;
#
# exists as global only
#
--echo Valid values are zero or above
SELECT @@global.innodb_rollback_segments >=0;
SELECT @@global.innodb_rollback_segments <=128;
SELECT @@global.innodb_rollback_segments;
--error ER_INCORRECT_GLOBAL_LOCAL_VAR
SELECT @@session.innodb_rollback_segments;
SHOW global variables LIKE 'innodb_rollback_segments';
SHOW session variables LIKE 'innodb_rollback_segments';
SELECT * FROM information_schema.global_variables
WHERE variable_name='innodb_rollback_segments';
SELECT * FROM information_schema.session_variables
WHERE variable_name='innodb_rollback_segments';
#
# show that it's writable
#
SET global innodb_rollback_segments=100;
SELECT @@global.innodb_rollback_segments;
SELECT * FROM information_schema.global_variables
WHERE variable_name='innodb_rollback_segments';
SELECT * FROM information_schema.session_variables
WHERE variable_name='innodb_rollback_segments';
--error ER_GLOBAL_VARIABLE
SET session innodb_rollback_segments=1;
#
# incorrect types
#
--error ER_WRONG_TYPE_FOR_VAR
SET global innodb_rollback_segments=1.1;
--error ER_WRONG_TYPE_FOR_VAR
SET global innodb_rollback_segments=1e1;
--error ER_WRONG_TYPE_FOR_VAR
SET global innodb_rollback_segments="foo";
SET global innodb_rollback_segments=-7;
SELECT @@global.innodb_rollback_segments;
SELECT * FROM information_schema.global_variables
WHERE variable_name='innodb_rollback_segments';
#
# cleanup
#
SET @@global.innodb_rollback_segments = @start_global_value;
SELECT @@global.innodb_rollback_segments;
|
