openGauss每日一练第 19 天| 学习心得体会

课后作业

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_tbs';
CREATE TABLESPACE
omm=# create database testdb10 with tablespace = test10_tbs;
CREATE DATABASE
omm=# 
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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 'user10@123';
NOTICE:  The encrypted password contains MD5 ciphertext, which is not secure.
CREATE ROLE
omm=# alter user user10 sysadmin;
omm=# 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 (i int);
CREATE TABLE
testdb10=> create table t2 (i int);
CREATE TABLE
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3、使用create role创建角色role10，登录数据库testdb10

omm=# create role role10 identified by 'role10@123';
NOTICE:  The encrypted password contains MD5 ciphertext, which is not secure.
CREATE ROLE
omm=# GRANT ALL ON DATABASE testdb10 to role10;
GRANT
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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

testdb10=> drop table t1;
DROP TABLE
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=> drop user user10;
ERROR:  current user cannot be dropped
testdb10=> \q
omm@modb:~$ 
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=# 
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5、最后删除role10

omm=# drop role role10;
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