select @@global.log_bin;
@@global.log_bin
0
select @@session.log_bin;
ERROR HY000: Variable 'log_bin' is a GLOBAL variable
show global variables like 'log_bin';
Variable_name	Value
log_bin	OFF
show session variables like 'log_bin';
Variable_name	Value
log_bin	OFF
select * from information_schema.global_variables where variable_name='log_bin';
VARIABLE_NAME	VARIABLE_VALUE
LOG_BIN	OFF
select * from information_schema.session_variables where variable_name='log_bin';
VARIABLE_NAME	VARIABLE_VALUE
LOG_BIN	OFF
set global log_bin=1;
ERROR HY000: Variable 'log_bin' is a read only variable
set session log_bin=1;
ERROR HY000: Variable 'log_bin' is a read only variable
