#
# only global
#
select @@global.myisam_recover_options;
--error ER_INCORRECT_GLOBAL_LOCAL_VAR
select @@session.myisam_recover_options;
show global variables like 'myisam_recover_options';
show session variables like 'myisam_recover_options';
select * from information_schema.global_variables where variable_name='myisam_recover_options';
select * from information_schema.session_variables where variable_name='myisam_recover_options';

#
# show that it's read-only
#
--error ER_INCORRECT_GLOBAL_LOCAL_VAR
set global myisam_recover_options=1;
--error ER_INCORRECT_GLOBAL_LOCAL_VAR
set session myisam_recover_options=1;