%0 Journal Article
%T QUERY OPTIMIZATION IN OBJECT ORIENTED DATABASE SYSTEMS<br>面向对象数据库的查询优化
%A WU Shengli
%A WANG Nengbin
%A <br>吴胜利
%A 王能斌
%J 软件学报
%D 1997
%I 
%X Query optimization traditionally involves two deeply connected levels that are qualified as logical and physical. In the implementation of a concrete system, dividing it in two completely is not a good way. Considering the problem comprehensively is much better , the authors discuss this in the paper based on association algebra, and give query optimization algorithms in object oriented database system which taking into account both logical and physical aspects.
%K Object oriented database
%K association algebra
%K query optimization<br>面向对象数据库
%K 联系代数
%K 查询优化
%U http://www.alljournals.cn/get_abstract_url.aspx?pcid=5B3AB970F71A803DEACDC0559115BFCF0A068CD97DD29835&cid=8240383F08CE46C8B05036380D75B607&jid=7735F413D429542E610B3D6AC0D5EC59&aid=ADC1FB5043A199F2D68171DBEF636513&yid=5370399DC954B911&vid=5D311CA918CA9A03&iid=0B39A22176CE99FB&sid=D59111839E7C8BDF&eid=1B97AE5098AEB49C&journal_id=1000-9825&journal_name=软件学报&referenced_num=5&reference_num=22