System_Relations
    Nosystem_Relations

    Specifies that optimizer statistics are to be collected for
    system tables (relations) and their associated indexes.

    If you do not specify the System_Relations qualifier, or if you
    specify the Nosystem_Relations qualifier, optimizer statistics
    are not collected for system tables or their associated indexes.

    Specify the Noindex qualifier if you do not want statistics
    collected for indexes defined on the system tables.

    The default is the Nosystem_Relations qualifier.