SET @start_global_value = @@global.innodb_simulate_comp_failures;
SELECT @start_global_value;
@start_global_value
0
Valid values are between 0 and 99
select @@global.innodb_simulate_comp_failures between 0 and 99;
@@global.innodb_simulate_comp_failures between 0 and 99
1
select @@global.innodb_simulate_comp_failures;
@@global.innodb_simulate_comp_failures
0
select @@session.innodb_simulate_comp_failures;
ERROR HY000: Variable 'innodb_simulate_comp_failures' is a GLOBAL variable
show global variables like 'innodb_simulate_comp_failures';
Variable_name	Value
innodb_simulate_comp_failures	0
show session variables like 'innodb_simulate_comp_failures';
Variable_name	Value
innodb_simulate_comp_failures	0
select * from information_schema.global_variables where variable_name='innodb_simulate_comp_failures';
VARIABLE_NAME	VARIABLE_VALUE
INNODB_SIMULATE_COMP_FAILURES	0
select * from information_schema.session_variables where variable_name='innodb_simulate_comp_failures';
VARIABLE_NAME	VARIABLE_VALUE
INNODB_SIMULATE_COMP_FAILURES	0
set global innodb_simulate_comp_failures=10;
select @@global.innodb_simulate_comp_failures;
@@global.innodb_simulate_comp_failures
10
select * from information_schema.global_variables where variable_name='innodb_simulate_comp_failures';
VARIABLE_NAME	VARIABLE_VALUE
INNODB_SIMULATE_COMP_FAILURES	10
select * from information_schema.session_variables where variable_name='innodb_simulate_comp_failures';
VARIABLE_NAME	VARIABLE_VALUE
INNODB_SIMULATE_COMP_FAILURES	10
set session innodb_simulate_comp_failures=1;
ERROR HY000: Variable 'innodb_simulate_comp_failures' is a GLOBAL variable and should be set with SET GLOBAL
set global innodb_simulate_comp_failures=1.1;
ERROR 42000: Incorrect argument type to variable 'innodb_simulate_comp_failures'
set global innodb_simulate_comp_failures=1e1;
ERROR 42000: Incorrect argument type to variable 'innodb_simulate_comp_failures'
set global innodb_simulate_comp_failures="foo";
ERROR 42000: Incorrect argument type to variable 'innodb_simulate_comp_failures'
set global innodb_simulate_comp_failures=-7;
Warnings:
Warning	1292	Truncated incorrect innodb_simulate_comp_failures value: '-7'
select @@global.innodb_simulate_comp_failures;
@@global.innodb_simulate_comp_failures
0
select * from information_schema.global_variables where variable_name='innodb_simulate_comp_failures';
VARIABLE_NAME	VARIABLE_VALUE
INNODB_SIMULATE_COMP_FAILURES	0
set global innodb_simulate_comp_failures=106;
Warnings:
Warning	1292	Truncated incorrect innodb_simulate_comp_failures value: '106'
select @@global.innodb_simulate_comp_failures;
@@global.innodb_simulate_comp_failures
99
select * from information_schema.global_variables where variable_name='innodb_simulate_comp_failures';
VARIABLE_NAME	VARIABLE_VALUE
INNODB_SIMULATE_COMP_FAILURES	99
set global innodb_simulate_comp_failures=0;
select @@global.innodb_simulate_comp_failures;
@@global.innodb_simulate_comp_failures
0
set global innodb_simulate_comp_failures=99;
select @@global.innodb_simulate_comp_failures;
@@global.innodb_simulate_comp_failures
99
set global innodb_simulate_comp_failures=DEFAULT;
select @@global.innodb_simulate_comp_failures;
@@global.innodb_simulate_comp_failures
0
SET @@global.innodb_simulate_comp_failures = @start_global_value;
SELECT @@global.innodb_simulate_comp_failures;
@@global.innodb_simulate_comp_failures
0
