使用终端安装 PostgreSQL 和 createdb
Installing PostgreSQL and `createdb` with Terminal
使用 Homebrew 从 terminal 安装 PostgreSQL 后...
➜ ~ brew link postgresql
Warning: Already linked: /usr/local/Cellar/postgresql/11.2_1: 3,186 files, 35.3MB
To relink: brew unlink postgresql && brew link postgresql
➜ ~ brew 服务重启 postgresql
Successfully stopped postgresql (label: homebrew.mxcl.postgresql)
Successfully started postgresql (label: homebrew.mxcl.postgresql)
➜ ~ createdb 'test'
createdb: could not connect to database template1: could not connect to server: No server file or directory
Is the server running locally and accepting connections on Unix domain socket "/tmp/.s.PGSQL.5432"?
我希望能够 运行 严格地从终端，而不是使用 PSequel GUI...
谢谢，
已解决
我的主要问题是：
➜ ~ createdb 'test'
createdb: could not connect to database template1: could not connect to server: No server file or directory
Is the server running locally and accepting connections on Unix domain socket "/tmp/.s.PGSQL.5432"?
这个问题简单地解决了：
➜ ~ postgres -D /usr/local/var/postgres
调用了数据库目录...
2019-05-06 14:20:37.367 EDT [41854] LOG: listening on IPv6 address "::1", port 5432
2019-05-06 14:20:37.367 EDT [41854] LOG: listening on IPv4 address "127.0.0.1", port 5432
2019-05-06 14:20:37.367 EDT [41854] LOG: listening on Unix socket "/tmp/.s.PGSQL.5432"
2019-05-06 14:20:37.384 EDT [41854] LOG: database system is ready to accept connections
保持 运行，并在我的终端上打开一个新标签：
➜ ~ createdb 'test'
➜ ~ psql 'test'
psql (11.2)
Type "help" for help.
test=#
我在调试期间使用的其他东西：
删除旧的数据库文件（这很危险）
➜ ~ rm -rf /usr/local/var/postgres
跟进
➜ ~ initdb /usr/local/var/postgres
initdb不用于创建“新数据库”
As Documented in the Manual 您需要它来创建一个“集群”或“数据目录”，然后存储使用 createdb
创建的数据库
引自手册：
Before you can do anything, you must initialize a database storage area on disk. We call this a database cluster. (The SQL standard uses the term catalog cluster.) A database cluster is a collection of databases that is managed by a single instance of a running database server
[...]
In file system terms, a database cluster is a single directory under which all data will be stored. We call this the data directory or data area
简而言之：initdb 在硬盘上创建必要的目录布局，以便能够创建和管理数据库。
它是 Postgres 服务器安装过程的必要部分。
使用 Homebrew 从 terminal 安装 PostgreSQL 后...
➜ ~ brew link postgresql
Warning: Already linked: /usr/local/Cellar/postgresql/11.2_1: 3,186 files, 35.3MB
To relink: brew unlink postgresql && brew link postgresql
➜ ~ brew 服务重启 postgresql
Successfully stopped postgresql (label: homebrew.mxcl.postgresql)
Successfully started postgresql (label: homebrew.mxcl.postgresql)
➜ ~ createdb 'test'
createdb: could not connect to database template1: could not connect to server: No server file or directory
Is the server running locally and accepting connections on Unix domain socket "/tmp/.s.PGSQL.5432"?
我希望能够 运行 严格地从终端，而不是使用 PSequel GUI...
谢谢，
已解决
我的主要问题是：
➜ ~ createdb 'test'
createdb: could not connect to database template1: could not connect to server: No server file or directory
Is the server running locally and accepting connections on Unix domain socket "/tmp/.s.PGSQL.5432"?
这个问题简单地解决了：
➜ ~ postgres -D /usr/local/var/postgres
调用了数据库目录...
2019-05-06 14:20:37.367 EDT [41854] LOG: listening on IPv6 address "::1", port 5432
2019-05-06 14:20:37.367 EDT [41854] LOG: listening on IPv4 address "127.0.0.1", port 5432
2019-05-06 14:20:37.367 EDT [41854] LOG: listening on Unix socket "/tmp/.s.PGSQL.5432"
2019-05-06 14:20:37.384 EDT [41854] LOG: database system is ready to accept connections
保持 运行，并在我的终端上打开一个新标签：
➜ ~ createdb 'test'
➜ ~ psql 'test'
psql (11.2)
Type "help" for help.
test=#
我在调试期间使用的其他东西：
删除旧的数据库文件（这很危险）
➜ ~ rm -rf /usr/local/var/postgres
跟进
➜ ~ initdb /usr/local/var/postgres
initdb不用于创建“新数据库”
As Documented in the Manual 您需要它来创建一个“集群”或“数据目录”，然后存储使用 createdb
引自手册：
Before you can do anything, you must initialize a database storage area on disk. We call this a database cluster. (The SQL standard uses the term catalog cluster.) A database cluster is a collection of databases that is managed by a single instance of a running database server
[...]
In file system terms, a database cluster is a single directory under which all data will be stored. We call this the data directory or data area
简而言之：initdb 在硬盘上创建必要的目录布局，以便能够创建和管理数据库。
它是 Postgres 服务器安装过程的必要部分。