Syntax options:

       WARNING DEPRECATE
       WARNING NODEPRECATE

    Specifies whether or not interactive SQL displays diagnostic
    messages when you issue statements containing obsolete SQL
    syntax. Deprecated or obsolete syntax is syntax that was allowed
    in previous versions of SQL but has been changed. Oracle Rdb
    recommends that you avoid using such syntax because it may not
    be supported in future versions. By default, SQL displays a
    warning message after any statement containing obsolete syntax
    (SET WARNING DEPRECATE).

    If you specify SET WARNING NODEPRECATE, SQL does not display any
    messages about obsolete syntax.