With the development of embedded applications, and the growing complexity of system functions, use of embedded database is increasingly becoming a trend in embedded devices applications. SQLite for its performance and functionality advantages will be widely used in embedded applications. But embedded devices is relatively low CPU processing power, memory capacity is limited, which restricts the performance of SQLite. For these problems, this paper according to the high-speed cache principle to simplify the process of SQL statement execution lexical analysis and syntax analysis, to reduce the time consumption during operation. Experiments show that this method can effectively improve the efficiency of SQL statements implementation, maintaining the availability and reliability of system, to enhance the overall performance of SQLite.%随着嵌入式应用领域的发展,系统功能的日趋复杂,嵌入式设备中使用嵌入式数据库越来越成为一种趋势.SQLite因其性能和功能上的优势被广泛的使用于嵌入式应用中.但是嵌入式设备CPU处理能力相对较低,存储器容量有限,制约了SQLite的性能.针对上述问题,根据高速缓存原理,简化SQL语句执行过程中的词法分析、语法分析过程,以减少运行过程中的时间消耗.实验表明,本方法可有效提高SQL语句执行效率,在保持可用性与可靠性的前提下,提升SQLite的整体性能.
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