openGauss每日一练第7天 | 创建修改删除表空间

1. 创建表空间，表空间tspc1使用相对路径指定所在目录，表空间tspc2指定owner为Lucy

CREATE TABLESPACE tspc1 RELATIVE LOCATION 'tablespace/tspc1';

CREATE ROLE Lucy IDENTIFIED BY 'abce@123';

CREATE TABLESPACE tspc2 OWNER Lucy RELATIVE LOCATION 'tablespace/tspc2';

omm=# \db
          List of tablespaces
    Name    | Owner |     Location     
------------+-------+------------------
 pg_default | omm   | 
 pg_global  | omm   | 
 tspc1      | omm   | tablespace/tspc1
 tspc2      | lucy  | tablespace/tspc2
(4 rows)

2.在表空间tspc1中建表，并使用视图pg_tables查看信息

create table customer
( c_customer_sk integer,
c_customer_id char(5),
c_first_name char(6),
c_last_name char(8)
) tablespace tspc1;;
select * from pg_tables where tablename = 'customer';

omm=# select * from pg_tables where tablename = 'customer';
 public     | customer  | omm        | tspc1      | f          | f        | f           | omm          | 2021-12-07 14:25:11.866475+08 | 2021-12-07 14:25:11.8664
75+08
(1 row)

 schemaname | tablename | tableowner | tablespace | hasindexes | hasrules | hastriggers | tablecreator |            created            |         last_ddl_time   
      
------------+-----------+------------+------------+------------+----------+-------------+--------------+-------------------------------+-------------------------
------
omm=# 

3.重命名tspc1，修改tspc2的用户为Lily，使用\db查看表空间信息

ALTER TABLESPACE tspc1 RENAME TO tspc101;
CREATE ROLE Lily IDENTIFIED BY 'abcd@789';

ALTER TABLESPACE tspc2 OWNER TO Lily;
\db

omm=# \db
          List of tablespaces
    Name    | Owner |     Location     
------------+-------+------------------
 pg_default | omm   | 
 pg_global  | omm   | 
 tspc101    | omm   | tablespace/tspc1
 tspc2      | lily  | tablespace/tspc2
(4 rows)

4.删除表空间

drop table customer;

DROP TABLESPACE IF EXISTS tspc2;

DROP TABLESPACE IF EXISTS tspc101;