How to Set Up a Foreign Data Wrapper in PostgreSQL

How to Set Up a Foreign Data Wrapper in PostgreSQL

Query a table in one database from another. For security reasons, you’ll likely want to create a read-only user to act as the go-between. This foreign user is the user that we’ll use for user mapping, which will be discussed later in this article.

A foreign data wrapper is an extension available in PostgreSQL that allows you to access a table or schema in one database from another. Foreign data wrappers can serve all sorts of purposes:

  • Completing a data flow cycle
  • Your data may be segregated across databases, but still related in ways that makes being able to combine or aggregate it desirable
  • Allows you to control the permissions on the foreign tables

Let’s go!

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