mariadb/mysql-test/suite/roles/grant_revoke_current.test

--source include/not_embedded.inc
select priv into @root_priv from mysql.global_priv where user='root' and host='localhost';

--error ER_MALFORMED_DEFINER
grant select on *.* to current_role;
--error ER_MALFORMED_DEFINER
revoke select on *.* from current_role;
--error ER_MALFORMED_DEFINER
revoke all, grant option from current_role;

create role r1;
grant insert on test.* to r1;
grant r1 to current_user;
set role r1;
select current_role();

grant select on *.* to current_role;
show grants for current_role;
revoke insert on test.* from current_role;
show grants for current_role;
revoke all, grant option from current_role;
show grants for current_role;

set password=password('foobar');
show grants;
grant r1 to current_user() identified by 'barfoo';
show grants;
set password='';

#cleanup
drop role r1;
update mysql.global_priv set priv=@root_priv where user='root' and host='localhost';