Controls whether or not identifiers can be keywords. If you
    specify SQL92, SQL99, SQL89, or MIA, you cannot use keywords as
    identifiers, unless you enclose them in double quotation marks.
    If you specify SQLV40, you can use keywords as identifiers. The
    default is SQLV40.

    Use the KEYWORD RULES clause, rather than the ANSI_IDENTIFIER
    qualifier, because the qualifier will be deprecated in a future
    release.