1select @@global.skip_show_database; 2@@global.skip_show_database 30 4select @@session.skip_show_database; 5ERROR HY000: Variable 'skip_show_database' is a GLOBAL variable 6show global variables like 'skip_show_database'; 7Variable_name Value 8skip_show_database OFF 9show session variables like 'skip_show_database'; 10Variable_name Value 11skip_show_database OFF 12select * from information_schema.global_variables where variable_name='skip_show_database'; 13VARIABLE_NAME VARIABLE_VALUE 14SKIP_SHOW_DATABASE OFF 15select * from information_schema.session_variables where variable_name='skip_show_database'; 16VARIABLE_NAME VARIABLE_VALUE 17SKIP_SHOW_DATABASE OFF 18set global skip_show_database=1; 19ERROR HY000: Variable 'skip_show_database' is a read only variable 20set session skip_show_database=1; 21ERROR HY000: Variable 'skip_show_database' is a read only variable 22