目前最新的CentOS 6.3中，仍然使用的是PostgreSQL 8.4版本。为了满足另一应用系统的需求，必须安装PostgreSQL 9及以上版本。本文将叙述如何使用PostgreSQL官方软件仓库和YUM工具，实现自动安装PostgeSQL 9。我使用的CentOS版本为6.3，该操作方法同样适用于使用CentOS 5, RedHat或者Fedora版本的朋友，只是需要注意下载文件时有对应的版本选择。
1、下载并安装PostgreSQL官方软件仓库
访问，选择对应的操作系统版本，下载repo rpm文件。对应我的操作系统CentOS 6.3 32位版本，使用wget命令下载，操作如下：
[root@wardking ~]# wget–2012-10-11 02:52:40–
Resolving yum.pgrpms.org… 98.129.198.114
Connecting to yum.pgrpms.org|98.129.198.114|:80… connected.
HTTP request sent, awaiting response… 200 OK
Length: 5328 (5.2K) [application/x-redhat-package-manager]
Saving to: pgdg-centos92-9.2-6.noarch.rpm
100%[==============================================================================================================================>] 5,328 24.7K/s in 0.2s
2012-10-11 02:52:42 (24.7 KB/s) – âœpgdg-centos92-9.2-6.noarch.rpmâ
安装软件仓库
[root@wardking ~]# rpm -ivh pgdg-centos92-9.2-6.noarch.rpmwarning: pgdg-centos92-9.2-6.noarch.rpm: Header V4 DSA/SHA1 Signature, key ID 442df0f8: NOKEY
Preparing… ########################################### [100%]
1:pgdg-centos92 ########################################### [100%]
编辑CentOS-Base.repo，将目前的CentOS仓库中的版本排除
[root@wardking ~]# vi /etc/yum.repos.d/CentOS-Base.repo# remarked out baseurl= line instead.
[base]
name=CentOS-$releasever – Base
mirrorlist=http://mirrorlist.centos.org/?release=$releasever&arch=$basearch&repo=os
#baseurl=http://mirror.centos.org/centos/$releasever/os/$basearch/
gpgcheck=1
gpgkey=file:///etc/pki/rpm-gpg/RPM-GPG-KEY-CentOS-6
exclude=postgresql*
#released updates
[updates]
name=CentOS-$releasever – Updates
mirrorlist=http://mirrorlist.centos.org/?release=$releasever&arch=$basearch&repo=updates
#baseurl=http://mirror.centos.org/centos/$releasever/updates/$basearch/
gpgcheck=1
gpgkey=file:///etc/pki/rpm-gpg/RPM-GPG-KEY-CentOS-6
exclude=postgresql*
试一下，应该可以看到最新的PostgreSQL出现在可用软件列表中：
[root@wardking ~]# yum list postgres*Loaded plugins: fastestmirror
Loading mirror speeds from cached hostfile
* base: mirrors.btte.net
* epel: mirrors.ustc.edu.cn
* extras: mirrors.btte.net
* rpmforge: mirror.fairway.ne.jp
* updates: mirrors.btte.net
base
extras
pgdg92
pgdg92/primary_db
updates
Installed Packages
postgresql.i686 8.4.13-1.el6_3
postgresql-contrib.i686 8.4.13-1.el6_3
postgresql-devel.i686 8.4.13-1.el6_3
postgresql-libs.i686 8.4.13-1.el6_3
postgresql-plperl.i686 8.4.13-1.el6_3
postgresql-server.i686 8.4.13-1.el6_3
Available Packages
postgresql-ip4r.i686 1.05-1.el6
postgresql-pgpool-II.i686 3.2.0-1.el6
postgresql-pgpool-II-devel.i686 3.2.0-1.el6
postgresql-pgpool-II-recovery.i686 3.2.0-1.el6
postgresql-plparrot.i686 0.04-5.el6
postgresql-plruby.i686 0.5.3-4.el6
postgresql-plruby-doc.i686 0.5.3-4.el6
postgresql-relay.i686 1.3-2.2.el6.rf
postgresql92.i686 9.2.1-1PGDG.rhel6
postgresql92-contrib.i686 9.2.1-1PGDG.rhel6
postgresql92-debuginfo.i686 9.2.1-1PGDG.rhel6
postgresql92-devel.i686 9.2.1-1PGDG.rhel6
postgresql92-docs.i686 9.2.1-1PGDG.rhel6
postgresql92-jdbc.i686 9.2.1000-1PGDG.rhel6
postgresql92-jdbc-debuginfo.i686 9.2.1000-1PGDG.rhel6
postgresql92-libs.i686 9.2.1-1PGDG.rhel6
postgresql92-odbc.i686 09.01.0200-1PGDG.rhel6
postgresql92-odbc-debuginfo.i686 09.01.0200-1PGDG.rhel6
postgresql92-plperl.i686 9.2.1-1PGDG.rhel6
postgresql92-plpython.i686 9.2.1-1PGDG.rhel6
postgresql92-pltcl.i686 9.2.1-1PGDG.rhel6
postgresql92-server.i686 9.2.1-1PGDG.rhel6
postgresql92-tcl.i686 2.0.0-1.rhel6
postgresql92-tcl-debuginfo.i686 2.0.0-1.rhel6
postgresql92-test.i686 9.2.1-1PGDG.rhel6