The catalog pg_user_mapping stores the mappings from local user to remote. Access to this catalog is restricted from normal users, use the view pg_user_mappings instead.

Table 49-56. pg_user_mapping Columns

Name Type References Description
oid oid Row identifier (hidden attribute; must be explicitly selected)
umuser oid pg_authid .oid OID of the local role being mapped, 0 if the user mapping is public
umserver oid pg_foreign_server .oid The OID of the foreign server that contains this mapping
umoptions text[] User mapping specific options, as "keyword=value" strings