Query Processing in Heterogeneous Data Sources Based on XQuery
Yuan Liu · Jisuanji gongcheng · 2009
The integration of heterogeneous data sources,which can effectively make use of the information sources and realize data sharing better,is a hotspot within the field of current data processing research.This paper describes an architecture of heterogeneous data integration system based on a Mediator-Wrapper middleware,and makes a deep research on the XQuery query processing,especially the key issues,such as query decomposition and optimization technology.This paper illustrates the realization of query decomposition and optimization with examples.