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
|
SET @start_global_value = @@global.sync_master_info;
SELECT @start_global_value;
#
# exists as global only
#
select @@global.sync_master_info;
--error ER_INCORRECT_GLOBAL_LOCAL_VAR
select @@session.sync_master_info;
show global variables like 'sync_master_info';
show session variables like 'sync_master_info';
select * from information_schema.global_variables where variable_name='sync_master_info';
select * from information_schema.session_variables where variable_name='sync_master_info';
#
# show that it's writable
#
set global sync_master_info=1;
select @@global.sync_master_info;
--error ER_GLOBAL_VARIABLE
set session sync_master_info=1;
#
# incorrect types
#
--error ER_WRONG_TYPE_FOR_VAR
set global sync_master_info=1.1;
--error ER_WRONG_TYPE_FOR_VAR
set global sync_master_info=1e1;
--error ER_WRONG_TYPE_FOR_VAR
set global sync_master_info="foo";
#
# min/max values
#
set global sync_master_info=0;
select @@global.sync_master_info;
set global sync_master_info=cast(-1 as unsigned int);
select @@global.sync_master_info;
SET @@global.sync_master_info = @start_global_value;
SELECT @@global.sync_master_info;
|
