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source include/not_embedded.inc;
#create a user with no privileges
create user test_user@localhost;
create role test_role1;
create role test_role2;
grant test_role1 to test_user@localhost;
grant test_role2 to test_user@localhost;
grant test_role2 to test_role1;
--sorted_result
select user, host from mysql.user where user not like 'root';
--sorted_result
select * from mysql.roles_mapping;
--sorted_result
select user, host from mysql.db;
grant select on mysql.* to test_role2;
flush privileges;
change_user 'test_user';
--error ER_TABLEACCESS_DENIED_ERROR
select * from mysql.roles_mapping;
select current_user(), current_role();
set role test_role1;
select current_user(), current_role();
--sorted_result
select * from mysql.roles_mapping;
set role none;
select current_user(), current_role();
--error ER_TABLEACCESS_DENIED_ERROR
select * from mysql.roles_mapping;
set role test_role2;
select current_user(), current_role();
--sorted_result
select * from mysql.roles_mapping;
change_user 'root';
create role test_role3;
grant test_role3 to test_role2;
create role test_role4;
grant test_role4 to test_role3;
change_user 'test_user';
set role test_role1;
--error ER_TABLEACCESS_DENIED_ERROR
delete from mysql.user where user='no such user';
change_user 'root';
grant delete on mysql.* to test_role4;
change_user 'test_user';
set role test_role1;
delete from mysql.user where user='no such user';
--sorted_result
show grants;
change_user 'root';
drop user test_user@localhost;
drop role test_role1, test_role2, test_role3, test_role4;
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