Embedded Database Management System And To Achieve

Embedded database management system is a new technology developed in recent years. It implements the convenient and unified data management on mobile devices and embedded devices, depending on the technology of the traditional common database management system and on the detail features of the embedded environment.In the subject, we designed and implemented an embedded database management system EDB (Ease Database), to manage the data of PDA (Personal Digital Assistant) uniformly. With the help of the EDB, users can design the PIM (Personal Information Management system) of PDA to manage the business and private data(such as business cards, memo, trip plan, etc) conveniently. The operations of the data such as index, sort, table merge etc are also very convenient.EDB system was designed by module and hierarchy. According the level of operation, the system can be divided by Interface Layer, Engine Layer-. Access Layer, Service Layer and Store Layer. Besides the common functions of creating, deleting table, inserting, deleting, updating record, doing query, etc, the system has some perfect features such as small foot_print, size scalable, multi plat form, robust and convenient application programming interface, etc.This paper mainly discuss the design and implementation of the EDB system. It has 6 chapters.What we mainly discussed in chapter 1 are: the necessity of using the EDBMS(Embedded DataBase Management System) to store and manage the data in the embedded device; the features of EDBMS; the present status of the development in the area of EDBMS domestically and abroad.The main contents in chapter 2 are the requirement, operating environment and developing environment of the EDB system. The position of the EDB in the whole system and the process of system development are also introduced in this chapter.In chapter 3,we discuss the total system design. The contents are including the design of system architecture, the system call which it offers and depends on, the working directory organization of the system and the data type which it supports.In chapter 4,we discuss the process of the system design in detail. The contents are including the logical format of various table file, some important data structure and macro definition. And we also give some flow process diagrams of the API(Application Program Interface) of the system.In chapter 5, we discuss several problems of the system, including system efficiency, system robust, etc.The chapter 6 is the summarization of the paper. We point out the present status of EDB system and some aspects of it need to improve.The last parts of the paper are some useful appendixes of the system.