The user_mappings view contains all of the user mappings defined in the current database. Greenplum Database displays only those user mappings to which the current user has access (by way of being the owner or having some privilege).

    columntypereferencesdescription
    authorization_identifiersql_identifier Name of the user being mapped, or PUBLIC if the mapping is public.
    foreign_server_catalogsql_identifier Name of the database in which the foreign server used by this mapping is defined (always the current database).
    foreign_server_namesql_identifier Name of the foreign server used by this mapping.

    Parent topic: System Catalogs Definitions