一个利用OTL编写的数据库编程访问接口类，里边封装了支持8字节长整数的操作（使用时需要选择相应的平台宏开关），为利用OTL编写跨平台跨数据库的朋友提供帮助-use of a database prepared by the QTL visit Programming Interface category, Packaging support inside the 8 byte long integer operations (need to use the selection of platform-switch), QTL prepared for the use of cross-platform database-to help a friend