Research And Realization On Some Critical Techniques Of The Embedded Memory DBMS Prototype NHMini

Following the development of web technology, the industry intelligence technology and the mobile computation technology, Embedded Database Management System(EDBMS) emerges and has the very broad application prospect.As EDBMS working under the specific environment, how to guarantee the integrity, the uniformity and the security of the database, are the keys of EDBMS research. Under such background, this thesis's research focuses on the data store management and the query access as well as the data secure technology.The main work and innovation of this thesis is as follows:⑴Introduced and analyzed EDBMS's application environment and demand. Discuss some key technologies of EDBMS, and analyzed the existing technologies.⑵Based on main memory database technology, designed and realized store management mechanism of NHMini. This thesis gave the NHMini system's architecture, the construction of data design and the main memory management method in detail, as well as the design and realizes of data load and synchronized algorithm which based on main memory data store technology.⑶Introduced and analyzed the common EDBMS's application environment and the application demand. Research and realized the embedded query language NHESQL as well as its C language application programming interface of NHMini. This thesis gave the design and realizes of SQL Communication Area which based on the shared variable and the cursor.⑷Information security questions emerge in the embedded system, this thesis briefly introduced the current database system's security policy as well as the multi-layered safety mechanism which applied into NHMini, then analyzed and discussed the embedded database intrusion detection technology, proposes one kind of anomaly detection algorithm QMBAD which based on user query pattern. At last, this thesis introduced its principle as well as implemention technology on the NHMini system in detail.