What is the function of the Postgres FDW module?
The postgres_fdw module provides the foreign-data wrapper postgres_fdw, which can be used to access data stored in external PostgreSQL servers. The functionality provided by this module overlaps substantially with the functionality of the older dblink module.
Can a foreign server use the Postgres FDW wrapper?
A foreign server using the postgres_fdw foreign data wrapper can have the same options that libpq accepts in connection strings, as described in Section 31.1.2, except that these options are not allowed:
Is the PostgreSQL foreign table always updatable?
By default all foreign tables using postgres_fdw are assumed to be updatable. This may be overridden using the following option: This option controls whether postgres_fdw allows foreign tables to be modified using INSERT, UPDATE and DELETE commands.
Can a constraint be imported from a remote table in Postgres?
Note that constraints other than NOT NULL will never be imported from the remote tables. Although PostgreSQL does support CHECK constraints on foreign tables, there is no provision for importing them automatically, because of the risk that a constraint expression could evaluate differently on the local and remote servers.
Is there an unsupported version of PostgreSQL?
This documentation is for an unsupported version of PostgreSQL. You may want to view the same page for the current version, or one of the other supported versions listed above instead. The postgres_fdw module provides the foreign-data wrapper postgres_fdw, which can be used to access data stored in external PostgreSQL servers.
How to upgrade PostgreSQL database to version 10?
Run analyze on upgraded databases (optional, as it would be done by autovacuum, but you can choose what relations should be analyzed first if you do it yourself) Here are some general notes that are good to know before you decide to go to PostgreSQL version 10…