openGauss每日一练第19天 | 用户和角色管理

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_tbs';
CREATE TABLESPACE
omm=# create database testdb10 tablespace test10_tbs ;
CREATE DATABASE

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

## 创建用户user10omm=# create user user10 identified by 'abcd@123';
NOTICE:  The encrypted password contains MD5 ciphertext, which is not secure.
CREATE ROLE## 赋予user10数据库testdb10的所有权限omm=# grant ALL on DATABASE testdb10 TO user10;
GRANT
omm=# alter user user10 sysadmin ;
ALTER ROLE
omm=# \q## 使用user10登录到testdb10数据库
omm@modb:~$ gsql -d testdb10 -U user10 -W abcd@123 -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.

testdb10=> create table t1(id integer);
 CREATE TABLE

testdb10=> create table t2 (name varchar(10));
CREATE TABLE

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

## 创建role10，并授予权限omm=# create role role10 identified by 'abcd@123';
NOTICE:  The encrypted password contains MD5 ciphertext, which is not secure.
CREATE ROLE
omm=# alter role role10 sysadmin ;
ALTER ROLEomm=# alter role role10 login ;
ALTER ROLE
## 登录到数据量testdb10omm=# \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=>

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

##　删除表t1testdb10=> drop table t1;
DROP TABLE## 修改tablespace、database、table的属主testdb10=> alter tablespace test10_tbs owner to role10 ;
ALTER TABLESPACE
testdb10=> alter database testdb10 owner to role10 ;
ALTER DATABASE
testdb10=> alter table t2 owner to role10 ;
ALTER TABLE
testdb10=> revoke ALL on DATABASE testdb10 FROM user10;
REVOKE
testdb10=> \c omm omm
Non-SSL connection (SSL connection is recommended when requiring high-security)
You are now connected to database "omm" as user "omm".
omm=# drop user user10;
DROP ROLE

5、最后删除role10

omm=# drop database testdb10;
DROP DATABASEomm=# drop tablespace test10_tbs ;
DROP TABLESPACE
omm=# drop role role10 ;
DROP ROLE