如何将远程 Postgresql 数据库（链接服务器）添加到 Postgresql 数据库？

Question

我家里有一个postgresql数据库，一个在云端。我想将我的家庭数据库添加到云数据库中，以便我可以轻松地在数据库之间进行查询。如何才能做到这一点？不使用 dblink http://www.postgresonline.com/journal/archives/44-Using-DbLink-to-access-other-PostgreSQL-Databases-and-Servers.html

我的主数据库将使用动态 ip 提供程序（我可以在 postgresql 设置中添加动态 ip 地址，例如 myhomedb.dedyn.io 吗？）

我说这一切是为了防止出现任何问题。我的家庭数据库将仅用于更新大量数据，但不是关键任务（因为我们知道云计算并不便宜）。

提前致谢。

Answer 1

看起来 postgres-fdw 是要走的路：https://www.postgresql.org/docs/current/postgres-fdw.html

First install the extension:
CREATE EXTENSION postgres_fdw;
Then create a foreign server using CREATE SERVER. In this example we wish to connect to a PostgreSQL server on host 192.83.123.89 listening on port 5432. The database to which the connection is made is named foreign_db on the remote server:
CREATE SERVER foreign_server
        FOREIGN DATA WRAPPER postgres_fdw
        OPTIONS (host '192.83.123.89', port '5432', dbname 'foreign_db');
A user mapping, defined with CREATE USER MAPPING, is needed as well to identify the role that will be used on the remote server:
CREATE USER MAPPING FOR local_user
        SERVER foreign_server
        OPTIONS (user 'foreign_user', password 'password');
Now it is possible to create a foreign table with CREATE FOREIGN TABLE. In this example we wish to access the table named some_schema.some_table on the remote server. The local name for it will be foreign_table:
CREATE FOREIGN TABLE foreign_table (
        id integer NOT NULL,
        data text
)
        SERVER foreign_server
        OPTIONS (schema_name 'some_schema', table_name 'some_table');
It's essential that the data types and other properties of the columns declared in CREATE FOREIGN TABLE match the actual remote table. Column names must match as well, unless you attach column_name options to the individual columns to show how they are named in the remote table. In many cases, use of IMPORT FOREIGN SCHEMA is preferable to constructing foreign table definitions manually.

如何将远程 Postgresql 数据库（链接服务器）添加到 Postgresql 数据库？

How to add a remote Postgresql db(linked server) to a Postgresql db?

postgresql

postgresql-10