记一次 Centos7 PostgreSql 数据库安装扩展

一、数据库搭建

1、yum 指定目录安装

https://blog.csdn.net/llwy1428/article/details/105143053

2、yum 直接安装

https://blog.csdn.net/llwy1428/article/details/102486414

3、编译安装

https://blog.csdn.net/llwy1428/article/details/95444151

4、PostgreSql 基本操作

https://blog.csdn.net/llwy1428/article/details/102598732

二、扩展安装

1、下载 epel-7.repo

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[root@pgadmin ~]# cd /etc/yum.repos.d/
[root@pgadmin yum.repos.d]# wget https://mirrors.aliyun.com/repo/epel-7.repo

2、安装工具

[root@localhost ~]# yum install pgagent_11 postgis25_11 -y

3、查看当前服务器可用的 Extension 扩展列表

# 切换用户
[root@localhost ~]# su - postgres
Last login: Mon Mar 16 21:15:46 CST 2020 on pts/3
# 进入 postgresql 命令行
[postgres@localhost ~]$ psql
psql (11.5)
Type "help" for help.

postgres=# select name from pg_available_extensions;
             name             
------------------------------
 insert_username
 dict_int
 adminpack
 amcheck
 intagg
 autoinc
 intarray
 bloom
 file_fdw
 dblink
 btree_gin
 fuzzystrmatch
 seg
 btree_gist
 jsonb_plperl
 hstore
 citext
 isn
 jsonb_plperlu
 cube
 hstore_plperl
 dict_xsyn
 hstore_plperlu
 earthdistance
 lo
 ltree
 pg_trgm
 tcn
 moddatetime
 pageinspect
 pg_visibility
 pgstattuple
 postgres_fdw
 pg_buffercache
 xml2
 pg_freespacemap
 refint
 sslinfo
 tablefunc
 pg_prewarm
 pgcrypto
 pg_stat_statements
 pgrowlocks
 timetravel
 tsm_system_rows
 address_standardizer
 tsm_system_time
 unaccent
 address_standardizer_data_us
 uuid-ossp
 postgis
 postgis_sfcgal
 postgis_tiger_geocoder
 postgis_topology
 plpgsql
(55 rows)

4、查看当前数据库列表

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

5、在默认数据库中安装 pgagent 扩展

postgres=# create extension pgagent;
CREATE EXTENSION

安装扩展成功

服务启动、关闭、设置开机启动

服务启动
[root@localhost ~]# systemctl start pgagent_11
服务停止
[root@localhost ~]# systemctl stop pgagent_11
服务当前状态查看
[root@localhost ~]# systemctl status pgagent_11
服务开机启动
[root@localhost ~]# systemctl enable pgagent_11
禁止服务开机启动
[root@localhost ~]# systemctl disable pgagent_11

6、在指定数据库中安装扩展

（1）创建测试数据库，并查看列表

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

（2）切换数据库

postgres=# \c pgtest
You are now connected to database "pgtest" as user "postgres".
pgtest=#

（3）安装扩展 postgis

pgtest=# create extension "uuid-ossp";
CREATE EXTENSION

（4）安装扩展 uuid-ossp

pgtest=# create extension postgis;
CREATE EXTENSION

（5）安装扩展 ltree

pgtest=# create extension "ltree";
CREATE EXTENSION

（6）安装扩展 timetravel

pgtest=# create extension "timetravel";
CREATE EXTENSION

其他扩展：略。

（7）查看当前已安装的扩展

pgtest=# \dx
                                      List of installed extensions
    Name    | Version |   Schema   |                             Description                             
------------+---------+------------+---------------------------------------------------------------------
 ltree      | 1.1     | public     | data type for hierarchical tree-like structures
 plpgsql    | 1.0     | pg_catalog | PL/pgSQL procedural language
 postgis    | 2.5.3   | public     | PostGIS geometry, geography, and raster spatial types and functions
 timetravel | 1.0     | public     | functions for implementing time travel
 uuid-ossp  | 1.1     | public     | generate universally unique identifiers (UUIDs)
(5 rows)

（8）删除Extension扩展，查看结果

pgtest=# drop extension timetravel;
DROP EXTENSION
pgtest=# \dx
                                      List of installed extensions
   Name    | Version |   Schema   |                             Description                             
-----------+---------+------------+---------------------------------------------------------------------
 ltree     | 1.1     | public     | data type for hierarchical tree-like structures
 plpgsql   | 1.0     | pg_catalog | PL/pgSQL procedural language
 postgis   | 2.5.3   | public     | PostGIS geometry, geography, and raster spatial types and functions
 uuid-ossp | 1.1     | public     | generate universally unique identifiers (UUIDs)
(4 rows)

至此，Centos7 PostgreSql 数据库安装插件基本操作完毕！

希望能够对您有所帮助！

记一次 Centos7 PostgreSql 数据库安装扩展

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