The system catalog table
pg_user_mapping stores the mappings from local user to remote user. You must have administrator privileges to view this catalog. Access to this catalog is restricted from normal users, use the
pg_user_mappings view instead.
||oid||pg_authid.oid||OID of the local role being mapped, 0 if the user mapping is public.|
||oid||pg_foreign_server.oid||OID of the foreign server that contains this mapping.|
||text||User mapping-specific options, as “keyword=value” strings.|
Parent topic: System Catalogs Definitions