文档查询语言ODQ查询优化技术  

Query optimization technology of document query language ODQ

作　　者：刘焕金[1,2] 施运梅[1,2] 刘旭红[1,2] 

机构地区：[1]北京信息科技大学计算机学院,北京100101 [2]北京信息科技大学网络文化与数字传播北京市重点实验室,北京100101

出　　处：《北京信息科技大学学报（自然科学版）》2016年第6期57-62,共6页Journal of Beijing Information Science and Technology University

基　　金：北京市教委科技计划面上项目(KM201511232012)

摘　　要：ODQ(Office Document Query)是一种面向流式办公文档的查询语言,为流式办公文档提供增、删、改、查操作。针对文档查询语言ODQ系统I/O操作时会导致执行效率下降的问题,通过采用查询重用技术对ODQ系统进行优化,提出了适合于ODQ的缓冲区管理策略,设计了缓冲区中节点的数据结构、缓冲区节点的替换策略。测试结果表明采用优化策略的ODQ执行效率比优化前有显著提高。ODQ is a query language for fluid office documents, providing all kinds of document operation functions, including insert, delete, update and select. First, aiming at the problem of the decline of execution efficiency caused by I/0 operations, query reuse technique is proposed to optimize the ODQ system, then a suitable buffer management strategy is put forward for ODQ, and the data structure and replacement strategy of buffer nodes are designed. Finally, tests demonstrate that ODQ execution efficiency after using the optimization strategy is significantly improved than before.

关 键 词：文档查询语言 查询重用 缓冲区替换策略 

分 类 号：TP302[自动化与计算机技术—计算机系统结构]