1、创建test10_tbs的表空间，在这个表空间中创建数据库testdb10。
su - omm
gsql -r
CREATE TABLESPACE test10_tbs RELATIVE LOCATION 'tablespace/test10_tbs1';
CREATE DATABASE testdb10 WITH TABLESPACE = test10_tbs;
\l
\db
root@modb:~# su - omm
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=# \l
List of databases
Name | Owner | Encoding | Collate | Ctype | Access privileges
-----------+-------+----------+---------+-------+-------------------
omm | omm | UTF8 | C | C |
postgres | omm | UTF8 | C | C |
template0 | omm | UTF8 | C | C | =c/omm +
| | | | | omm=CTc/omm
template1 | omm | UTF8 | C | C | =c/omm +
| | | | | omm=CTc/omm
(4 rows)
omm=# CREATE TABLESPACE test10_tbs RELATIVE LOCATION 'tablespace/test10_tbs1';
CREATE TABLESPACE
omm=# CREATE DATABASE testdb10 WITH TABLESPACE = test10_tbs;
CREATE DATABASE
omm=# \l
List of databases
Name | Owner | Encoding | Collate | Ctype | Access privileges
-----------+-------+----------+---------+-------+-------------------
omm | omm | UTF8 | C | C |
postgres | omm | UTF8 | C | C |
template0 | omm | UTF8 | C | C | =c/omm +
| | | | | omm=CTc/omm
template1 | omm | UTF8 | C | C | =c/omm +
| | | | | omm=CTc/omm
testdb10 | omm | UTF8 | C | C |
(5 rows)
omm=# \db
List of tablespaces
Name | Owner | Location
------------+-------+------------------------
pg_default | omm |
pg_global | omm |
test10_tbs | omm | tablespace/test10_tbs1
(3 rows)
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。
CREATE USER user10 IDENTIFIED BY 'mygstest@1234';
GRANT ALL ON DATABASE testdb10 TO user10;
ALTER USER user10 SYSADMIN;
\q
gsql -d testdb10 -U user10 -W mygstest@1234 -r
create table t1(product_id INTEGER,product_name Char(20),category Char(30));
insert into t1 values(1502,'olympus camera','electrncs'),(1601,'lamaze','toys'),(1700,'wait interface','Books'),(1666,'harry potter','toys');
select * from t1;
create table t2(product_id INTEGER,product_name Char(20),category Char(30));
insert into t2 values(1502,'olympus camera','electrncs'),(1601,'lamaze','toys'),(1700,'wait interface','Books'),(1666,'harry potter','toys');
select * from t2;
omm=# CREATE USER user10 IDENTIFIED BY 'mygstest@1234';
NOTICE: The encrypted password contains MD5 ciphertext, which is not secure.
omm=# CREATE ROLE
omm=# GRANT ALL ON DATABASE testdb10 TO user10;
GRANT
omm=# ALTER USER user10 SYSADMIN;
ALTER ROLE
omm=# \q
omm@modb:~$ gsql -d testdb10 -U user10 -W mygstest@1234 -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(product_id INTEGER,product_name Char(20),category Char(30));
CREATE TABLE
testdb10=> create table t2(product_id INTEGER,product_name Char(20),category Char(30));
CREATE TABLE
testdb10=> insert into t1 values(1502,'olympus camera','electrncs'),(1601,'lamaze','toys'),(1700,'wait interface','Books'),(1666,'harry potter','toys');
INSERT 0 4
testdb10=> insert into t2 values(1502,'olympus camera','electrncs'),(1601,'lamaze','toys'),(1700,'wait interface','Books'),(1666,'harry potter','toys');
testdb10=> INSERT 0 4
testdb10=>
select * from t1;
product_id | product_name | category
------------+----------------------+--------------------------------
1502 | olympus camera | electrncs
1601 | lamaze | toys
1700 | wait interface | Books
1666 | harry potter | toys
(4 rows)
testdb10=> select * from t2;
product_id | product_name | category
------------+----------------------+--------------------------------
1502 | olympus camera | electrncs
1601 | lamaze | toys
1700 | wait interface | Books
1666 | harry potter | toys
(4 rows)
testdb10=>
3、使用create role创建角色role10，登录数据库testdb10。
gsql -r
CREATE ROLE role10 IDENTIFIED BY 'mygstest@1234';
GRANT ALL ON DATABASE testdb10 TO role10;
--使用用户role10尝试登录到数据库testdb10：
gsql -d testdb10 -U role10 -W mygstest@1234 -r
\q
gsql -r
alter user role10 LOGIN;
\du
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 'mygstest@1234';
NOTICE: The encrypted password contains MD5 ciphertext, which is not secure.
CREATE ROLE
omm=# GRANT ALL ON DATABASE testdb10 TO role10;
GRANT
omm=# \q
omm@modb:~$ gsql -d testdb10 -U role10 -W mygstest@1234 -r
gsql: FATAL: role "role10" is not permitted to login
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=# alter user role10 LOGIN;
ALTER ROLE
omm=# \q
omm@modb:~$ gsql -d testdb10 -U role10 -W mygstest@1234 -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=> \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=# \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
| {}
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。
gsql -d testdb10 -U role10 -W mygstest@1234 -r
drop table t1;
REASSIGN OWNED BY user10 to role10;
--要删除用户role10，必须先表空间对象和数据库对象的属主修改为其他的用户（如user10用户），或者干脆将其删除：
alter database testdb10 owner to role10;
alter tablespace test10_tbs owner to role10;
--回收用户user10对testdb10数据库的权限：
REVOKE ALL ON DATABASE testdb10 FROM user10;
drop user user10;
omm@modb:~$ gsql -d testdb10 -U role10 -W mygstest@1234 -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=> drop table t1;
DROP TABLE
testdb10=>\dt
List of relations
Schema | Name | Type | Owner | Storage
--------+------+-------+--------+----------------------------------
public | t2 | table | user10 | {orientation=row,compression=no}
(1 row)
testdb10=> REASSIGN OWNED BY user10 to role10;
REASSIGN OWNED
testdb10=> \dt
List of relations
Schema | Name | Type | Owner | Storage
--------+------+-------+--------+----------------------------------
public | t2 | table | role10 | {orientation=row,compression=no}
(1 row)
omm=# \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=# alter database testdb10 owner to role10;
ALTER DATABASE
omm=# alter tablespace test10_tbs owner to role10;
ALTER TABLESPACE
omm=# REVOKE ALL ON DATABASE testdb10 FROM user10;
REVOKE
omm=# drop user user10;
DROP ROLE
omm=#
5、最后删除role10。
su - omm
gsql -r
drop database testdb10;
drop tablespace test10_tbs;
drop role role10;
root@modb:~# su - omm
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.
Invalid command \su. Try \? for help.
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 | Sysadmin
| {}
omm=# drop role role10;
ERROR: role "role10" cannot be dropped because some objects depend on it
DETAIL: owner of tablespace test10_tbs
owner of database testdb10
1 object in database testdb10
omm=# drop database testdb10;
DROP DATABASE
omm=# drop tablespace test10_tbs;
DROP TABLESPACE
omm=# drop role role10;
DROP ROLE
omm=# \x
Expanded display is on.
omm=# \du
List of roles
-[ RECORD 1 ]----------------------------------------------------------------------------------------------------------------
Role name | gaussdb
Attributes | Sysadmin
Member of | {}
-[ RECORD 2 ]----------------------------------------------------------------------------------------------------------------
Role name | omm
Attributes | Sysadmin, Create role, Create DB, Replication, Administer audit, Monitoradmin, Operatoradmin, Policyadmin, UseFT
Member of | {}
omm=#
「喜欢这篇文章，您的关注和赞赏是给作者最好的鼓励」
关注作者
【版权声明】本文为墨天轮用户原创内容，转载时必须标注文章的来源（墨天轮），文章链接，文章作者等基本信息，否则作者和墨天轮有权追究责任。如果您发现墨天轮中有涉嫌抄袭或者侵权的内容，欢迎发送邮件至：contact@modb.pro进行举报，并提供相关证据，一经查实，墨天轮将立刻删除相关内容。
