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本地编译安装fdw插件

cd contrib/postgres_fdw USE_PGX=1 make install

本地安装extension

postgres=# create extension if not exists postgres_fdw; CREATE EXTENSION postgres=# \dx List of installed extensions Name | Version | Schema | Description --------------+---------+------------+---------------------------------------------------- plpgsql | 1.0 | pg_catalog | PL/pgSQL procedural language postgres_fdw | 1.0 | public | foreign-data wrapper for remote PostgreSQL servers (2 rows)

本地配置server

postgres=# create server postgres_fdwtest FOREIGN data wrapper postgres_fdw OPTIONS(host '127.0.0.1', port '5432', dbname 'postgres'); CREATE SERVER postgres=# create user mapping for postgres server postgres_fdwtest options(user 'postgres',password 'postgres'); CREATE USER MAPPING

本地建外表

postgres=# create foreign table pg_fdw_test(id int,name text) server postgres_fdwtest options (table_name 'pg_fdw_test'); CREATE FOREIGN TABLE

远端建表

postgres=# create table pg_fdw_test(id int,name text); CREATE TABLE

本地更新，查询外表

postgres=# insert into pg_fdw_test values(1,'test'); INSERT 0 1 postgres=# select * from pg_fdw_test; id | name ----+------ 1 | test (1 rows)

远端查询

postgres=# select * from pg_fdw_test; id | name ----+------ 1 | test (1 row) postgres=# drop foreign table pg_fdw_test; DROP FOREIGN TABLE drop server postgres_fdwtest CASCADE;