connect  mysql, localhost, root,,;
use mysql;
alter table user drop column is_role;
alter table user drop column default_role;
alter table user drop column max_statement_time;
flush privileges;
create role test_role;
ERROR HY000: Column count of mysql.user is wrong. Expected 45, found 44. Created with MariaDB MYSQL_VERSION_ID, now running MYSQL_VERSION_ID. Please use mysql_upgrade to fix this error
drop role test_role;
ERROR HY000: Operation DROP ROLE failed for 'test_role'
alter table user add column is_role enum('N', 'Y') default 'N' not null
COLLATE utf8_general_ci
after password_expired;
create role test_role;
create user test_user@localhost;
grant test_role to test_user@localhost;
set default role test_role for root@localhost;
drop role test_role;
drop user test_user@localhost;
alter table user add column default_role char(80) binary default '' not null
COLLATE utf8_general_ci
after is_role;
alter table user add max_statement_time decimal(12,6) default 0 not null
after default_role;
update user set is_role='N';
flush privileges;
create role test_role;
drop role test_role;