Compatibility with Future Record Data Types
Future releases of the Ingres DBMS system can include Ingres types whose names conflict with record types previously defined by the user. Ingres allows for this situation by continuing to support previously defined record types.
Whenever a data type can be either a record type or an Ingres data type, Ingres searches the record types first, followed by the data types. However, users cannot define new record types conflicting with new or existing Ingres data types.