pg_dump不能导出访问权限 pg_dumpall可以导出访问权限

于 2017-09-13 21:39:55 发布
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CC 4.0 BY-SA版权
分类专栏： PostgreSQL Highgo DB
版权声明：本文为博主原创文章，遵循 CC 4.0 BY-SA 版权协议，转载请附上原文出处链接和本声明。
本文链接：https://blog.youkuaiyun.com/lk_db/article/details/77971440
本文对比了pg_dump和pg_dumpall在导出数据库时对访问权限处理的不同。pg_dump无法导出访问权限，而pg_dumpall可以。通过示例展示了使用这两个工具进行数据库导出和导入的步骤，以及在导入过程中权限设置的差异。

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pg_dump导出，psql导入：
[highgo@hg lib]$ ./pg_dump -h localhost -U highgo --port=5866 -f my_dump.sql  --inserts
[highgo@hg lib]$ psql 
psql (4.0.0)
Type "help" for help.


highgo=# 
highgo=# \l
                               List of databases
   Name    | Owner  | Encoding |   Collate   |    Ctype    | Access privileges 
-----------+--------+----------+-------------+-------------+-------------------
 highgo    | highgo | UTF8     | en_US.UTF-8 | en_US.UTF-8 | 
 template0 | highgo | UTF8     | en_US.UTF-8 | en_US.UTF-8 | =c/highgo        +
           |        |          |             |             | highgo=CTc/highgo
 template1 | highgo | UTF8     | en_US.UTF-8 | en_US.UTF-8 | highgo=CTc/highgo+
           |        |          |             |             | =c/highgo
 test      | highgo | UTF8     | en_US.UTF-8 | en_US.UTF-8 | highgo=CTc/highgo+
           |        |          |             |             | =Tc/highgo
(4 rows)


highgo=# drop database test;
DROP DATABASE
highgo=# create database test;
CREATE DATABASE
highgo=# \l
                               List of databases
   Name    | Owner  | Encoding |   Collate   |    Ctype    | Access privileges 
-----------+--------+----------+-------------+-------------+-------------------
 highgo    | highgo | UTF8     | en_US.UTF-8 | en_US.UTF-8 | 
 template0 | highgo | UTF8     | en_US.UTF-8 | en_US.UTF-8 | =c/highgo        +
           |        |          |             |             | highgo=CTc/highgo
 template1 | highgo | UTF8     | en_US.UTF-8 | en_US.UTF-8 | highgo=CTc/highgo+
           |        |          |             |             | =c/highgo
 test      | highgo | UTF8     | en_US.UTF-8 | en_US.UTF-8 | 
(4 rows)


highgo=# \q
[highgo@hg lib]$ pwd
/highgo/hgdb4_server/lib
[highgo@hg lib]$ pg_restore -h localhost -p 5866 -U highgo -d test --create --verbose --format custom "/highgo/hgdb4_server/lib/my_dump.sql"
pg_restore: [archiver] did not find magic string in file header
[highgo@hg lib]$ psql -h localhost -U highgo -d test < my_dump.sql 
SET
SET
SET
SET
SET
SET
SET
COMMENT
CREATE EXTENSION
COMMENT
SET
SET
SET
CREATE TABLE
ALTER TABLE
ALTER TABLE
INSERT 0 1
INSERT 0 1
INSERT 0 1
INSERT 0 1
REVOKE
REVOKE
GRANT
GRANT
[highgo@hg lib]$ psql
psql (4.0.0)
Type "help" for help.


highgo=# \l
                               List of databases
   Name    | Owner  | Encoding |   Collate   |    Ctype    | Access privileges 
-----------+--------+----------+-------------+-------------+-------------------
 highgo    | highgo | UTF8     | en_US.UTF-8 | en_US.UTF-8 | 
 template0 | highgo | UTF8     | en_US.UTF-8 | en_US.UTF-8 | =c/highgo        +
           |        |          |             |             | highgo=CTc/highgo
 template1 | highgo | UTF8     | en_US.UTF-8 | en_US.UTF-8 | highgo=CTc/highgo+
           |        |          |             |             | =c/highgo
 test      | highgo | UTF8     | en_US.UTF-8 | en_US.UTF-8 | 
(4 rows)


highgo=# 
========================================================================================
========================================================================================


pg_dumpall导出，psql导入：


 ./pg_dumpall -h localhost -U highgo --port=5866 -f my_dumpall.sql  --inserts


[highgo@hg lib]$ psql 
psql (4.0.0)
Type "help" for help.


highgo=# 
highgo=# \l
                               List of databases
   Name    | Owner  | Encoding |   Collate   |    Ctype    | Access privileges 
-----------+--------+----------+-------------+-------------+-------------------
 highgo    | highgo | UTF8     | en_US.UTF-8 | en_US.UTF-8 | 
 template0 | highgo | UTF8     | en_US.UTF-8 | en_US.UTF-8 | =c/highgo        +
           |        |          |             |             | highgo=CTc/highgo
 template1 | highgo | UTF8     | en_US.UTF-8 | en_US.UTF-8 | =c/highgo        +
           |        |          |             |             | highgo=CTc/highgo
 test      | highgo | UTF8     | en_US.UTF-8 | en_US.UTF-8 | =Tc/highgo       +
           |        |          |             |             | highgo=CTc/highgo
(4 rows)


highgo=# drop database test;
DROP DATABASE
highgo=# create database test;
CREATE DATABASE
highgo=# \l
                               List of databases
   Name    | Owner  | Encoding |   Collate   |    Ctype    | Access privileges 
-----------+--------+----------+-------------+-------------+-------------------
 highgo    | highgo | UTF8     | en_US.UTF-8 | en_US.UTF-8 | 
 template0 | highgo | UTF8     | en_US.UTF-8 | en_US.UTF-8 | =c/highgo        +
           |        |          |             |             | highgo=CTc/highgo
 template1 | highgo | UTF8     | en_US.UTF-8 | en_US.UTF-8 | =c/highgo        +
           |        |          |             |             | highgo=CTc/highgo
 test      | highgo | UTF8     | en_US.UTF-8 | en_US.UTF-8 | 
(4 rows)


highgo=# CREATE ROLE highgo;
ERROR:  42710: role "highgo" already exists
highgo=# ALTER ROLE highgo WITH SUPERUSER INHERIT CREATEROLE CREATEDB LOGIN REPLICATION BYPASSRLS;
ALTER ROLE
highgo=# \l
                               List of databases
   Name    | Owner  | Encoding |   Collate   |    Ctype    | Access privileges 
-----------+--------+----------+-------------+-------------+-------------------
 highgo    | highgo | UTF8     | en_US.UTF-8 | en_US.UTF-8 | 
 template0 | highgo | UTF8     | en_US.UTF-8 | en_US.UTF-8 | =c/highgo        +
           |        |          |             |             | highgo=CTc/highgo
 template1 | highgo | UTF8     | en_US.UTF-8 | en_US.UTF-8 | =c/highgo        +
           |        |          |             |             | highgo=CTc/highgo
 test      | highgo | UTF8     | en_US.UTF-8 | en_US.UTF-8 | 
(4 rows)


highgo=# ALTER ROLE test WITH NOSUPERUSER INHERIT NOCREATEROLE NOCREATEDB LOGIN NOREPLICATION NOBYPASSRLS PASSWORD 'md505a671c66aefea124cc08b76ea6d30bb';
ALTER ROLE
highgo=# \l
                               List of databases
   Name    | Owner  | Encoding |   Collate   |    Ctype    | Access privileges 
-----------+--------+----------+-------------+-------------+-------------------
 highgo    | highgo | UTF8     | en_US.UTF-8 | en_US.UTF-8 | 
 template0 | highgo | UTF8     | en_US.UTF-8 | en_US.UTF-8 | =c/highgo        +
           |        |          |             |             | highgo=CTc/highgo
 template1 | highgo | UTF8     | en_US.UTF-8 | en_US.UTF-8 | =c/highgo        +
           |        |          |             |             | highgo=CTc/highgo
 test      | highgo | UTF8     | en_US.UTF-8 | en_US.UTF-8 | 
(4 rows)


highgo=# \q
[highgo@hg lib]$ psql -h localhost -U highgo -d test < my_dumpall.sql 
SET
SET
SET
ERROR:  42710: role "aaa" already exists
ALTER ROLE
ERROR:  42710: role "highgo" already exists
ALTER ROLE
ERROR:  42710: role "test" already exists
ALTER ROLE
ERROR:  42P04: database "highgo" already exists
REVOKE
REVOKE
GRANT
GRANT
ERROR:  42P04: database "test" already exists
REVOKE
REVOKE
GRANT
GRANT
You are now connected to database "highgo" as user "highgo".
SET
SET
SET
SET
SET
SET
SET
SET
COMMENT
CREATE EXTENSION
COMMENT
SET
SET
SET
ERROR:  42P07: relation "test" already exists
ALTER TABLE
ALTER TABLE
INSERT 0 1
INSERT 0 1
REVOKE
REVOKE
GRANT
GRANT
You are now connected to database "template1" as user "highgo".
SET
SET
SET
SET
SET
SET
SET
SET
COMMENT
CREATE EXTENSION
COMMENT
REVOKE
REVOKE
GRANT
GRANT
You are now connected to database "test" as user "highgo".
SET
SET
SET
SET
SET
SET
SET
SET
CREATE EXTENSION
COMMENT
REVOKE
REVOKE
GRANT
GRANT
[highgo@hg lib]$ psql
psql (4.0.0)
Type "help" for help.


highgo=# \l
                               List of databases
   Name    | Owner  | Encoding |   Collate   |    Ctype    | Access privileges 
-----------+--------+----------+-------------+-------------+-------------------
 highgo    | highgo | UTF8     | en_US.UTF-8 | en_US.UTF-8 | 
 template0 | highgo | UTF8     | en_US.UTF-8 | en_US.UTF-8 | =c/highgo        +
           |        |          |             |             | highgo=CTc/highgo
 template1 | highgo | UTF8     | en_US.UTF-8 | en_US.UTF-8 | highgo=CTc/highgo+
           |        |          |             |             | =c/highgo
 test      | highgo | UTF8     | en_US.UTF-8 | en_US.UTF-8 | highgo=CTc/highgo+
           |        |          |             |             | =Tc/highgo
(4 rows)


highgo=# 
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