--创建用户
create user readonlyuser password 'Pass@123';
--只读
alter user readonlyuser set default_transaction_read_only=on;
--授权
grant usage on schema appuser to readonlyuser;
grant select on all tables in schema appuser to readonlyuser;
--新增表读的权限
alter default privileges in schema appuser grant select on all tables to readonlyuser;