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
|
#
# 2010-01-20 OBN Added check for I_S values after variable value changed
#
SET @start_global_value = @@global.optimizer_switch;
SELECT @start_global_value;
#
# exists as global and session
#
--replace_result hypergraph_optimizer=on hypergraph_optimizer=off
select @@global.optimizer_switch;
--replace_result hypergraph_optimizer=on hypergraph_optimizer=off
select @@session.optimizer_switch;
--replace_result hypergraph_optimizer=on hypergraph_optimizer=off
show global variables like 'optimizer_switch';
--replace_result hypergraph_optimizer=on hypergraph_optimizer=off
show session variables like 'optimizer_switch';
--disable_warnings
--replace_result hypergraph_optimizer=on hypergraph_optimizer=off
select * from performance_schema.global_variables where variable_name='optimizer_switch';
--replace_result hypergraph_optimizer=on hypergraph_optimizer=off
select * from performance_schema.session_variables where variable_name='optimizer_switch';
--enable_warnings
#
# show that it's writable
#
set global optimizer_switch=10;
set session optimizer_switch=5;
--replace_result hypergraph_optimizer=on hypergraph_optimizer=off
select @@global.optimizer_switch;
--replace_result hypergraph_optimizer=on hypergraph_optimizer=off
select @@session.optimizer_switch;
set global optimizer_switch="index_merge_sort_union=on";
set session optimizer_switch="index_merge=off";
--replace_result hypergraph_optimizer=on hypergraph_optimizer=off
select @@global.optimizer_switch;
--replace_result hypergraph_optimizer=on hypergraph_optimizer=off
select @@session.optimizer_switch;
--replace_result hypergraph_optimizer=on hypergraph_optimizer=off
show global variables like 'optimizer_switch';
--replace_result hypergraph_optimizer=on hypergraph_optimizer=off
show session variables like 'optimizer_switch';
--disable_warnings
--replace_result hypergraph_optimizer=on hypergraph_optimizer=off
select * from performance_schema.global_variables where variable_name='optimizer_switch';
--replace_result hypergraph_optimizer=on hypergraph_optimizer=off
select * from performance_schema.session_variables where variable_name='optimizer_switch';
--enable_warnings
set session optimizer_switch="default";
--replace_result hypergraph_optimizer=on hypergraph_optimizer=off
select @@session.optimizer_switch;
#
# incorrect assignments
#
--error ER_WRONG_TYPE_FOR_VAR
set global optimizer_switch=1.1;
--error ER_WRONG_TYPE_FOR_VAR
set global optimizer_switch=1e1;
--error ER_WRONG_VALUE_FOR_VAR
set session optimizer_switch="index_merge";
--error ER_WRONG_VALUE_FOR_VAR
set session optimizer_switch="foobar";
--echo #
--echo # Bug#59894 set optimizer_switch to e or d causes invalid
--echo # memory writes/valgrind warnings
--echo
set global optimizer_switch = 'def'; # means default
--error ER_WRONG_VALUE_FOR_VAR
set global optimizer_switch = 'e';
--echo #
--echo # Bug#31326120 UBSAN:
--echo # SHIFT EXPONENT 4294967294 IS TOO LARGE FOR 64-BIT TYPE
--error ER_WRONG_VALUE_FOR_VAR
set optimizer_switch ='b';
--error ER_WRONG_VALUE_FOR_VAR
set optimizer_switch = 0x6400ec62;
SET @@global.optimizer_switch = @start_global_value;
SELECT @@global.optimizer_switch;
|
