pg_foreign_table — PostgreSQL system catalog

Summary

The catalog pg_foreign_table contains auxiliary information about foreign tables. A foreign table is primarily represented by a pg_class entry, just like a regular table. Its pg_foreign_table entry contains the information that is pertinent only to foreign tables and not any other kind of relation.

(Description quoted from the official PostgreSQL documentation.)

Columns

The pg_foreign_table system catalog exposes the following columns (names, types and descriptions are taken verbatim from the PostgreSQL documentation):

• ftrelid oid references pg_class.oid
  The OID of the pg_class entry for this foreign table
• ftserver oid references pg_foreign_server.oid
  OID of the foreign server for this foreign table
• ftoptions text[]
  Foreign table options, as “keyword=value” strings

Related catalogs

This object references the following other system catalogs:

• ftrelid → pg_class
• ftserver → pg_foreign_server

Version applicability

Present in PostgreSQL 17, 18, 19 (verified against each release’s documentation). This is a long-standing system object that also exists in earlier PostgreSQL releases.

Related & references

• PostgreSQL system catalog & view index
• Built-in function reference

Reference: PostgreSQL documentation — pg_foreign_table.