SET @start_global_value = @@global.innodb_log_checkpoint_now;
SELECT @start_global_value;
@start_global_value
0
select @@global.innodb_log_checkpoint_now in (0, 1);
@@global.innodb_log_checkpoint_now in (0, 1)
1
select @@global.innodb_log_checkpoint_now;
@@global.innodb_log_checkpoint_now
0
select @@session.innodb_log_checkpoint_now;
ERROR HY000: Variable 'innodb_log_checkpoint_now' is a GLOBAL variable
show global variables like 'innodb_log_checkpoint_now';
Variable_name	Value
innodb_log_checkpoint_now	OFF
show session variables like 'innodb_log_checkpoint_now';
Variable_name	Value
innodb_log_checkpoint_now	OFF
select * from information_schema.global_variables where variable_name='innodb_log_checkpoint_now';
VARIABLE_NAME	VARIABLE_VALUE
INNODB_LOG_CHECKPOINT_NOW	OFF
select * from information_schema.session_variables where variable_name='innodb_log_checkpoint_now';
VARIABLE_NAME	VARIABLE_VALUE
INNODB_LOG_CHECKPOINT_NOW	OFF
set global innodb_log_checkpoint_now=1;
select @@global.innodb_log_checkpoint_now;
@@global.innodb_log_checkpoint_now
0
select * from information_schema.global_variables where variable_name='innodb_log_checkpoint_now';
VARIABLE_NAME	VARIABLE_VALUE
INNODB_LOG_CHECKPOINT_NOW	OFF
select * from information_schema.session_variables where variable_name='innodb_log_checkpoint_now';
VARIABLE_NAME	VARIABLE_VALUE
INNODB_LOG_CHECKPOINT_NOW	OFF
set @@global.innodb_log_checkpoint_now=0;
select @@global.innodb_log_checkpoint_now;
@@global.innodb_log_checkpoint_now
0
select * from information_schema.global_variables where variable_name='innodb_log_checkpoint_now';
VARIABLE_NAME	VARIABLE_VALUE
INNODB_LOG_CHECKPOINT_NOW	OFF
select * from information_schema.session_variables where variable_name='innodb_log_checkpoint_now';
VARIABLE_NAME	VARIABLE_VALUE
INNODB_LOG_CHECKPOINT_NOW	OFF
set global innodb_log_checkpoint_now=ON;
select @@global.innodb_log_checkpoint_now;
@@global.innodb_log_checkpoint_now
0
select * from information_schema.global_variables where variable_name='innodb_log_checkpoint_now';
VARIABLE_NAME	VARIABLE_VALUE
INNODB_LOG_CHECKPOINT_NOW	OFF
select * from information_schema.session_variables where variable_name='innodb_log_checkpoint_now';
VARIABLE_NAME	VARIABLE_VALUE
INNODB_LOG_CHECKPOINT_NOW	OFF
set global innodb_log_checkpoint_now=OFF;
select @@global.innodb_log_checkpoint_now;
@@global.innodb_log_checkpoint_now
0
select * from information_schema.global_variables where variable_name='innodb_log_checkpoint_now';
VARIABLE_NAME	VARIABLE_VALUE
INNODB_LOG_CHECKPOINT_NOW	OFF
select * from information_schema.session_variables where variable_name='innodb_log_checkpoint_now';
VARIABLE_NAME	VARIABLE_VALUE
INNODB_LOG_CHECKPOINT_NOW	OFF
set session innodb_log_checkpoint_now='some';
ERROR HY000: Variable 'innodb_log_checkpoint_now' is a GLOBAL variable and should be set with SET GLOBAL
set @@session.innodb_log_checkpoint_now='some';
ERROR HY000: Variable 'innodb_log_checkpoint_now' is a GLOBAL variable and should be set with SET GLOBAL
set global innodb_log_checkpoint_now=1.1;
ERROR 42000: Incorrect argument type to variable 'innodb_log_checkpoint_now'
set global innodb_log_checkpoint_now='foo';
ERROR 42000: Variable 'innodb_log_checkpoint_now' can't be set to the value of 'foo'
set global innodb_log_checkpoint_now=-2;
ERROR 42000: Variable 'innodb_log_checkpoint_now' can't be set to the value of '-2'
set global innodb_log_checkpoint_now=1e1;
ERROR 42000: Incorrect argument type to variable 'innodb_log_checkpoint_now'
SET @@global.innodb_log_checkpoint_now = @start_global_value;
SELECT @@global.innodb_log_checkpoint_now;
@@global.innodb_log_checkpoint_now
0