安装后无法连接到 Mac OS X 上的 Postgresql

Question

所以我在我的 Mac 上安装了 Postgresql，每当我运行 psql 或 createdb cool_database_name 之类的东西时，我都会收到以下错误。

psql: could not connect to server: No such file or directory
    Is the server running locally and accepting
    connections on Unix domain socket "/tmp/.s.PGSQL.5432"?

所以我遵循不同的解决方案。我重新安装 postgresql 无济于事。我去 postgresql.conf` 并将其更改为

#port = 5432                             # (change requires restart)
#max_connections = 20                    # (change requires restart)
# Note:  Increasing max_connections costs ~400 bytes of shared memory per
# connection slot, plus lock space (see max_locks_per_transaction).
#superuser_reserved_connections = 3     # (change requires restart)
#unix_socket_directory = '/var/pgsql_socket'             # (change requires restart)
#unix_socket_group = ''                 # (change requires restart)
#unix_socket_permissions = 0777         # begin with 0 to use octal notation

还是什么都没有。我运行诸如

之类的命令

ls -lA /var/run/postgresql

这告诉我文件或目录不存在。

我还检查了pg_hba.conf 文件，但一切正常

# "local" is for Unix domain socket connections only
local   all             all                                     trust
# IPv4 local connections:
host    all             all             127.0.0.1/32            trust
# IPv6 local connections:
host    all             all             ::1/128                 trust
# Allow replication connections from localhost, by a user with the
# replication privilege.
#local   replication     jason                                trust
#host    replication     jason        127.0.0.1/32            trust
#host    replication     jason        ::1/128                 trust

当我运行psql -h localhost 时，我得到了

psql: could not connect to server: Connection refused
    Is the server running on host "localhost" (::1) and accepting
    TCP/IP connections on port 5432?
could not connect to server: Connection refused
    Is the server running on host "localhost" (127.0.0.1) and accepting
    TCP/IP connections on port 5432?
could not connect to server: Connection refused
    Is the server running on host "localhost" (fe80::1) and accepting
    TCP/IP connections on port 5432?

我不知道如何解决这个问题。任何帮助，将不胜感激。

Answer 1

问题在于 Mac OS 自带 PostgreSQL

$ `which psql` --version
psql (PostgreSQL) 9.1.4
contains support for command-line editing

您需要像这样更改 PATH：

export PATH="path_to_bin_folder_of_your_new_postgres_install:$PATH"

例如，对于 Postgres.app：

export PATH="/Applications/Postgres.app/Contents/MacOS/bin:$PATH"

这可能有用：http://blog.ringerc.id.au/2012/09/postgresql-packaging-on-mac-os-x-is-mess.html