1SET GLOBAL gtid_current_pos= '';
2ERROR HY000: Variable 'gtid_current_pos' is a read only variable
3SELECT variable_name FROM information_schema.global_variables
4WHERE variable_name='gtid_current_pos';
5variable_name
6GTID_CURRENT_POS
7SELECT @@gtid_current_pos;
8SELECT @@session.gtid_current_pos;
9ERROR HY000: Variable 'gtid_current_pos' is a GLOBAL variable
10