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
|
SET @start_value = @@global.read_only;
SELECT @start_value;
@start_value
0
'#--------------------FN_DYNVARS_139_01------------------------#'
SET @@global.read_only = 1;
SET @@global.read_only = DEFAULT;
SELECT @@global.read_only;
@@global.read_only
0
'#---------------------FN_DYNVARS_139_02-------------------------#'
SET @@global.read_only = @start_value;
SELECT @@global.read_only = 0;
@@global.read_only = 0
1
'#--------------------FN_DYNVARS_139_03------------------------#'
SET @@global.read_only = 0;
SELECT @@global.read_only;
@@global.read_only
0
SET @@global.read_only = 1;
SELECT @@global.read_only;
@@global.read_only
1
SET @@global.read_only = TRUE;
SELECT @@global.read_only;
@@global.read_only
1
SET @@global.read_only = FALSE;
SELECT @@global.read_only;
@@global.read_only
0
SET @@global.read_only = ON;
SELECT @@global.read_only;
@@global.read_only
1
SET @@global.read_only = OFF;
SELECT @@global.read_only;
@@global.read_only
0
'#--------------------FN_DYNVARS_139_04-------------------------#'
SET @@global.read_only = -1;
ERROR 42000: Variable 'read_only' can't be set to the value of '-1'
SELECT @@global.read_only;
@@global.read_only
0
SET @@global.read_only = 4294967296;
ERROR 42000: Variable 'read_only' can't be set to the value of '4294967296'
SELECT @@global.read_only;
@@global.read_only
0
SET @@global.read_only = 10240022115;
ERROR 42000: Variable 'read_only' can't be set to the value of '10240022115'
SELECT @@global.read_only;
@@global.read_only
0
SET @@global.read_only = 10000.01;
ERROR 42000: Incorrect argument type to variable 'read_only'
SELECT @@global.read_only;
@@global.read_only
0
SET @@global.read_only = -1024;
ERROR 42000: Variable 'read_only' can't be set to the value of '-1024'
SELECT @@global.read_only;
@@global.read_only
0
SET @@global.read_only = 42949672950;
ERROR 42000: Variable 'read_only' can't be set to the value of '42949672950'
SELECT @@global.read_only;
@@global.read_only
0
SET @@global.read_only = 'test';
ERROR 42000: Variable 'read_only' can't be set to the value of 'test'
SELECT @@global.read_only;
@@global.read_only
0
'#-------------------FN_DYNVARS_139_05----------------------------#'
SET @@session.read_only = 0;
ERROR HY000: Variable 'read_only' is a GLOBAL variable and should be set with SET GLOBAL
SELECT @@read_only;
@@read_only
0
'#----------------------FN_DYNVARS_139_06------------------------#'
SELECT IF(@@global.read_only, "ON", "OFF") = VARIABLE_VALUE
FROM INFORMATION_SCHEMA.GLOBAL_VARIABLES
WHERE VARIABLE_NAME='read_only';
IF(@@global.read_only, "ON", "OFF") = VARIABLE_VALUE
1
SELECT IF(@@read_only, "ON", "OFF") = VARIABLE_VALUE
FROM INFORMATION_SCHEMA.SESSION_VARIABLES
WHERE VARIABLE_NAME='read_only';
IF(@@read_only, "ON", "OFF") = VARIABLE_VALUE
1
'#---------------------FN_DYNVARS_139_07----------------------#'
SET @@global.read_only = 1;
SELECT @@read_only = @@global.read_only;
@@read_only = @@global.read_only
1
'#---------------------FN_DYNVARS_139_08----------------------#'
SET read_only = 1;
ERROR HY000: Variable 'read_only' is a GLOBAL variable and should be set with SET GLOBAL
SELECT @@read_only;
@@read_only
1
SELECT local.read_only;
ERROR 42S02: Unknown table 'local' in SELECT
SELECT global.read_only;
ERROR 42S02: Unknown table 'global' in SELECT
SELECT read_only = @@session.read_only;
ERROR 42S22: Unknown column 'read_only' in 'SELECT'
SET @@global.read_only = @start_value;
SELECT @@global.read_only;
@@global.read_only
0
|
