Controls whether or not identifiers can be keywords. If you specify SQL99, SQL92, 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 SQLOPTIONS = ANSI_ IDENTIFIER qualifier because the qualifier will be deprecated in a future release.