}
public void test_union() throws SQLException, Exception {
String query = "select * from user_info where user_id = ? and age = ? and password = ? and username like ? or (sex >= ?) ";
String orderByQuery = "select * from user_info where user_id = ? and age = ? and password = ? and username like ? or (sex >= ?) order by :orderby ";
Sql sql = parser.parseSql(query+" union " + query);
verifyParameters(sql,"userId","username","password","age","sex");
sql = parser.parseSql(orderByQuery+" union " + orderByQuery);
verifyParameters(sql,"userId","username","password","age","sex");
}