管理报表系统用户自定义函数解析器算法实现  

User Define Function Expression Parser Algorithm on the Management Report System

作　　者：陈新林[1] 张双武[1] 

机构地区：[1]中南大学商学院

出　　处：《武汉理工大学学报（信息与管理工程版）》2008年第3期374-377,共4页Journal of Wuhan University of Technology：Information & Management Engineering

基　　金：湖南省科技计划资助项目(2006ZK3104);深圳市科技计划资助项目(SZKJ0608)

摘　　要：针对目前通用报表系统不能实现用户自定义函数的问题,提出了一个基于F1BOOK的表达式解析器算法,通过该表达式解析器可以实现用户自定义函数。解析器实现步骤包括变量的识别与替换、内部函数的识别与替换,及自定义函数的识别与替换等。介绍了数据库中获取用户自定义函数结果值的算法,以及算法实现实例分析和部分函数实现的关键技术。通过该解析器大大提高了通用报表系统的灵活性,使其适应面更广。As general report forms cannot realize the user define functions, an expression parser algorithm based on F1BOOK was put forward. It includes the identification and substitution of the variables, the inner functions and the user define functions etc. The algorithm to get the function result through the user define function in database as well as some key technology to the realization of this algorithm based on some case analysis were introduced. The algorithm can greatly improve the agility to the general report system, which makes it applicable in many different areas.

关 键 词：自定义函数 表达式解析器 通用报表设计 

分 类 号：TP311[自动化与计算机技术—计算机软件与理论]