摘要
分析和研究了XML数据在关系数据库中的存储方法,提出了全面的存储方法,此种存储方法是基于查询代价的,首先通过转换接口把XML DTD转换为XML Schema,然后通过DOM树解析工具得到初始模式,接着通过模式转换操作获取模式空间,之后引入了以哈希连接算法为基础的代价模型,用改进的算法从模式空间中找出一个最优的模式,提高了存储方法的性能。最后,通过实验证明改进后的映射方法与经典的伯哈农存储方法相比较具有更好的性能。
Analysis and research of the XML data stored in a relational database approach,in this paper, a comprehensive storage method is put forward.This storage method is based on the query cost.First of all, through the conversion interface, the XML DTD into XML Schema,Then use the DOM tree analysis tool get the initial mode of analysis tools,Then use the mode conversion to obtain pattern space, after the introduction to hash join algorithm based on cost model, improved method is used from the model space to find a best model,improve the performance of the storage method.Finally,experiments shows that improved mapping method and the classical Bohannon storage method have better performance compared.
出处
《湖南农机（学术版）》
2010年第5期32-33,60,共3页
Hunnan Agricultural Machinery
