[转] Mac 下 PostgreSQL 的安装与使用

在 mac 下，可以利用 homebrew 直接安装 PostgreSQL：

稍等片刻，PostgreSQL 就安装完成。接下来就是初始数据库，在终端执行一下命令，初始配置 PostgreSQL：

上面指定 "/usr/local/var/postgres" 为 PostgreSQL 的配置数据存放目录，并且设置数据库数据编码是 utf8，更多配置信息可以 "initdb --help" 查看。

设成开机启动 PostgreSQL：

启动 PostgreSQL：

关闭 PostgreSQL：

创建一个 PostgreSQL 用户

上面的 username 是用户名，回车输入 2 次用户密码后即用户创建完成。更多用户创建信息可以 "createuser --help" 查看。

创建数据库

上面创建了一个名为 dbname 的数据库，并指定 username 为改数据库的拥有者（owner），数据库的编码（encoding）是 UTF8，参数 "-e" 是指把数据库执行操作的命令显示出来。

更多数据库创建信息可以 "createdb --help" 查看。

连接数据库

WARNING: enabling "trust" authentication for local connections

You can change this by editing pg_hba.conf or using the option -A, or

--auth-local and --auth-host, the next time you run initdb.

Success. You can now start the database server using:

/usr/local/Cellar/postgresql/9.5.1/bin/pg_ctl -D /usr/local/var/postgres -l logfile start

==> Caveats

If builds of PostgreSQL 9 are failing and you have version 8.x installed,

you may need to remove the previous version first. See:
https://github.com/Homebrew/homebrew/issues/2510
To migrate existing data from a previous major version (pre-9.0) of PostgreSQL, see:
http://www.postgresql.org/docs/9.5/static/upgrading.html
To migrate existing data from a previous minor version (9.0-9.4) of PosgresSQL, see:
http://www.postgresql.org/docs/9.5/static/pgupgrade.html
You will need your previous PostgreSQL installation from brew to perform `pg_upgrade`.

Do not run `brew cleanup postgresql` until you have performed the migration.

To have launchd start postgresql at login:

ln -sfv /usr/local/opt/postgresql/*.plist ~/Library/LaunchAgents

Then to load postgresql now:

launchctl load ~/Library/LaunchAgents/homebrew.mxcl.postgresql.plist

Or, if you don't want/need launchctl, you can just run:

postgres -D /usr/local/var/postgres

==> Summary

🍺 /usr/local/Cellar/postgresql/9.5.1: 3,118 files, 35M

XXXdeMacBook-Air:chat-room XXX$ initdb /usr/local/var/postgres -E utf8

The files belonging to this database system will be owned by user "XXX".

This user must also own the server process.

The database cluster will be initialized with locale "zh_CN.UTF-8".

initdb: could not find suitable text search configuration for locale "zh_CN.UTF-8"

The default text search configuration will be set to "simple".

Data page checksums are disabled.

initdb: directory "/usr/local/var/postgres" exists but is not empty

If you want to create a new database system, either remove or empty

the directory "/usr/local/var/postgres" or run initdb

with an argument other than "/usr/local/var/postgres".

XXXdeMacBook-Air:chat-room XXX$