课程作业

1、创建test10_tbs的表空间，在这个表空间中创建数据库testdb10

omm=# CREATE TABLESPACE test10_tbs RELATIVE LOCATION 'tablespace/test10_tbs1';
CREATE TABLESPACE
omm=# CREATE DATABASE testdb10 WITH TABLESPACE = test10_tbs;
CREATE DATABASE
omm=# 

2、使用create user创建用户user10，登录数据库testdb10，创建测试表t1和t2

omm=# CREATE USER user10 IDENTIFIED BY 'kunpeng@1234';
NOTICE:  The encrypted password contains MD5 ciphertext, which is not secure.
CREATE ROLE

omm=# CREATE DATABASE testdb10 WITH TABLESPACE = test10_tbs;
CREATE DATABASE
omm=# GRANT ALL ON DATABASE testdb10 TO user10;
GRANT
omm=# ALTER USER user10 SYSADMIN;
ALTER ROLE
omm=# \c testdb10 user10
Password for user user10: 
Non-SSL connection (SSL connection is recommended when requiring high-security)
You are now connected to database "testdb10" as user "user10".
testdb10=>  CREATE TABLE t1 (col int);
CREATE TABLE
testdb10=>  CREATE TABLE t2 (col int);
CREATE TABLE

3、使用create role创建角色role10，登录数据库testdb10

omm@modb:~$ gsql -r
gsql ((openGauss 3.0.0 build 02c14696) compiled at 2022-04-01 18:12:00 commit 0 last mr  )
Non-SSL connection (SSL connection is recommended when requiring high-security)
Type "help" for help.

omm=#  CREATE ROLE  role10  IDENTIFIED BY 'kunpeng@1234';
NOTICE:  The encrypted password contains MD5 ciphertext, which is not secure.
CREATE ROLE
omm=#  GRANT ALL ON DATABASE testdb10 to role10;
GRANT

omm=# alter user role10 login;
ALTER ROLE
omm=# alter role role10 sysadmin;
ALTER ROLE

omm=# \du
                                                          List of roles
Role name |                                                    Attributes                                
                | Member of 
-----------+----------------------------------------------------------------------------------------------
--------------------+-----------
gaussdb   | Sysadmin                                                                                     
                | {}
omm       | Sysadmin, Create role, Create DB, Replication, Administer audit, Monitoradmin, Operatoradmin,
Policyadmin, UseFT | {}
 role10    |                                                                                              
                | {}
	 user10    | Sysadmin                                                                                     
                | {}

omm=# 
omm=# \c testdb10 role10
Password for user role10: 
Non-SSL connection (SSL connection is recommended when requiring high-security)
You are now connected to database "testdb10" as user "role10".

4、将表t1直接删除，将前面创建的表空间和数据库、表t2转给role10，删除用户user10

omm=# \c testdb10 role10
Password for user role10: 
Non-SSL connection (SSL connection is recommended when requiring high-security)
You are now connected to database "testdb10" as user "role10".
	testdb10=> drop table  t1;
DROP TABLE
testdb10=> alter database testdb10 owner to role10;
ALTER DATABASE
testdb10=> alter tablespace test10_tbs owner to role10;
testdb10=> ALTER TABLESPACE
testdb10=>  REASSIGN OWNED BY user10 to role10;
REASSIGN OWNED                              ^
testdb10=> REVOKE ALL ON DATABASE testdb10 from user10;
REVOKE
testdb10=> \dt
                     List of relations
Schema | Name | Type  | Owner  |             Storage              
--------+------+-------+--------+----------------------------------
public | t2   | table | role10 | {orientation=row,compression=no}
(1 row)
testdb10=> \q
omm@modb:~$ gsql -r
gsql ((openGauss 3.0.0 build 02c14696) compiled at 2022-04-01 18:12:00 commit 0 last mr  )
Non-SSL connection (SSL connection is recommended when requiring high-security)
Type "help" for help.

omm=#  drop user user10;
DROP ROLE
omm=# 

5、最后删除role10

omm=# REASSIGN OWNED BY role10 to omm;
REASSIGN OWNED
omm=# alter tablespace test10_tbs owner to omm;
ALTER TABLESPACE
omm=# drop user role10;
omm=# REVOKE ALL ON DATABASE testdb10 from role10;
REVOKE
omm=# alter database testdb10 owner to omm;
ALTER DATABASE
omm=# drop user role10;
DROP ROLE
omm=#