| 摘要: |
| CHIQL（Chinesequerylanguage）是一个正在开发中的中文数据库查询语言．为满足各种用户的需要，CHIQL在设计上具有如下的特点：符合中国用户思维方式的较自然的中文表述方式；过程化与非过程化相结合的多语句查询．对CHIQL而言，在实现上与传统SQL的最大区别在于它的多语句查询处理技术方面．本文在描述了CHIQL语言特征之后，重点讨论了多语句查询独特的优化问题，提出了基于语句合并的优化方法，并定性地分析了效率改善情况． |
| 关键词: 中文查询语言（CHIQL） SQL 用户界面 数据库系统 |
| DOI： |
| 分类号: |
| 基金项目:本文研究得到国家自然科学基金和Chinese University of Hong Kong and the RGC94／95 Earmarked Research Grant资助. |
|
| THE MULTI-STATEMENT FEATURES AND OPTIMIZATION IN CHIQL |
|
MENG Xiaofeng,WANG Shan,Lum V Y,Wong K F,Low B T
|
| Abstract: |
| CHIQL is a new database query language to，satisfy the requests of Chinese users and has the features of naturalness and simplicity，procedural and multi-statement query．AS a main feature，procedurality enable users to use multi-statements to express a query with 11 templates，especially concerning complex one．In term of its implementa-tion，multi-statement optimization iS a special issue in CHIQL．This paper devises a state-ment.merge method to improve the efficiency of CHIQL query and give some qualitative analysis about it． |
| Key words: Chinese query language （CHlQL） SQL user interface database systems |
