1select @@global.plugin_maturity;
2@@global.plugin_maturity
3unknown
4select @@session.plugin_maturity;
5ERROR HY000: Variable 'plugin_maturity' is a GLOBAL variable
6show global variables like 'plugin_maturity';
7Variable_name	Value
8plugin_maturity	unknown
9show session variables like 'plugin_maturity';
10Variable_name	Value
11plugin_maturity	unknown
12select * from information_schema.global_variables where variable_name='plugin_maturity';
13VARIABLE_NAME	VARIABLE_VALUE
14PLUGIN_MATURITY	unknown
15select * from information_schema.session_variables where variable_name='plugin_maturity';
16VARIABLE_NAME	VARIABLE_VALUE
17PLUGIN_MATURITY	unknown
18set global plugin_maturity=1;
19ERROR HY000: Variable 'plugin_maturity' is a read only variable
20set session plugin_maturity=1;
21ERROR HY000: Variable 'plugin_maturity' is a read only variable
22