public class MyH2Dialect extends H2Dialect {

    public MyH2Dialect() {
        super();

        // @formatter:off
        registerFunction(
            "normalize",
            new SQLFunctionTemplate(
                StandardBasicTypes.STRING,
                "REGEXP_REPLACE( "
                + "    REPLACE( "
                + "        TRANSLATE( "
                + "            LOWER(?1), "
                + "            'áàãâäéèêëíìîïóòõôöúùûüç', "
                + "            'aaaaaeeeeiiiiooooouuuuc' "
                + "        ), "
                + "        ' ', "
                + "        '' "
                + "    ), "
                + "    '[\\u2000-\\u206F\\u2E00-\\u2E7F\\\\''!\"#$%&()*+,\\-.\\/:;<=>?@\\[\\]^_`{|}~]', " // -- '?'' causes the problem
                + "    '' "
                + ")"
            )
        );
        // @formatter:on
    }

}