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create role r1;
grant r1 to root@localhost;
create user u1;
set role r1;
grant r1 to u1;
select * from mysql.roles_mapping;
Host User Role Admin_option
% u1 r1 N
localhost root r1 Y
drop user u1;
select * from mysql.roles_mapping;
Host User Role Admin_option
localhost root r1 Y
show grants;
Grants for root@localhost
GRANT ALL PRIVILEGES ON *.* TO `root`@`localhost` WITH GRANT OPTION
GRANT PROXY ON ''@'%' TO 'root'@'localhost' WITH GRANT OPTION
GRANT USAGE ON *.* TO `r1`
GRANT `r1` TO `root`@`localhost` WITH ADMIN OPTION
drop role r1;
select * from mysql.roles_mapping;
Host User Role Admin_option
show grants;
Grants for root@localhost
GRANT ALL PRIVILEGES ON *.* TO `root`@`localhost` WITH GRANT OPTION
GRANT PROXY ON ''@'%' TO 'root'@'localhost' WITH GRANT OPTION
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