Postgresql安装
1.Postgresql简介2. Postgresql源码编译
<1>. Postgresql简介
Postgresql是一款object-relational DBMS，提供了如下的feature：
复杂查询complex queries
外键foreign key
触发器trigger
视图views
支持事务transactional integrity
并发控制multiversion concurrency control
另外值得一提的是Postgresql数据库提供了强大的拓展功能，能够支持用户对其进行拓展。更为重要的是Postgresql是open soure，授权如下：PostgreSQL can be used, modified, and distributed by anyone freeof charge for any purpose, be it private, commercial, or academic.
<2>.Postgresql源代码编译
2.1 下载Postgresql源代码
xuqiang@ubuntu:~/postgresql/postgresql-9.0.3$ wget ftp://ftp2.cn.postgresql.org/postgresql/source/v9.0.3/postgresql-9.0.3.tar.bz2
2.2 解压该文件
xuqiang@ubuntu:~/postgresql/postgresql-9.0.3$ tar xjvf postgresql-9.0.3.tar.bz2
2.3 进入解压玩的目录
xuqiang@ubuntu:~/postgresql/postgresql-9.0.3$ cd postgresql-9.0.3/
2.4 查看INSTALL
INSTALL文件中Short Version部分解释了如何安装postgresql的命令，Requirements部分描述了安装postgresql所依赖的lib，比较长，先configure试一下，如果出现error，那么需要检查是否满足了Requirements的要求。
2.5 执行INSTALL文件中Short Version的命令，开始编译安装postgrepsql数据库。
xuqiang@ubuntu:~/postgresql/postgresql-9.0.3$ ./configure
在我的环境下执行configure命令时，出现如下错误:
checking for main in -lm... yes
checking for library containing setproctitle... no
checking for library containing dlopen... -ldl
checking for library containing socket... none required
checking for library containing shl_load... no
checking for library containing getopt_long... none required
checking for library containing crypt... -lcrypt
checking for library containing fdatasync... none required
checking for library containing gethostbyname_r... none required
checking for library containing shmget... none required
checking for -lreadline... no
checking for -ledit... no
configure: error: readline library not found
If you have readline already installed, see config.log for details on the
failure. It is possible the compiler isnt looking in the proper directory.
Use --without-readline to disable readline support.
显然是postgresql安装所需的依赖项没有满足，安装readline包：
sudo apt-get install libreadline5-dev
sudo apt-get install zlib1g-dev
安装readline包之后，重新configure，成功。
2.6 make
xuqiang@ubuntu:~/postgresql/postgresql-9.0.3$ make
2.7 make install
xuqiang@ubuntu:~/postgresql/postgresql-9.0.3$ make install
2.8 添加用户postgres
xuqiang@ubuntu:~/postgresql/postgresql-9.0.3$ sudo adduser postgres
2.9 创建数据库文件存储文件夹
xuqiang@ubuntu:~/postgresql/postgresql-9.0.3$ sudo mkdir /usr/local/pgsql/data
2.10 改变先前创建的data目录的文件夹的权限
qiang@ubuntu:~/postgresql/postgresql-9.0.3$ sudo chown postgres /usr/local/pgsql/data
2.11 切换用户
su - postgres
2.12 绑定数据库文件存储目录
postgres:~/postgresql/postgresql-9.0.3$ sudo /usr/local/pgsql/bin/initdb -D /usr/local/pgsql/data
2.13 启动数据库
postgres:~/postgresql/postgresql-9.0.3$ sudo /usr/local/pgsql/bin/postgres -D /usr/local/pgsql/data >logfile 2>&1 &
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2.14 创建数据库test
postgres@ubuntu:~$ /usr/local/pgsql/bin/createdb test
2.15 连接到test数据库
postgres@ubuntu:~$ /usr/local/pgsql/bin/psql test
psql (9.0.3)
Type "help" for help.
test=#
2.16 创建表table1
test=# create table table1 (
test(# id integer
test(# );
CREATE TABLE
test=#
2.17 向table1表中插入一条记录
test=# insert into table1 values(1);
INSERT 0 1
2.18 查询刚刚插入的记录
test=# select * from table1;
id
----
1
(1 row)
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