Query Decomposition Algorithm Based on Multi-source Heterogeneous Data
2010; East China Computer Technology Research Institute; Linguagem: Inglês
ISSN
1000-3428
Autores Tópico(s)Advanced Computational Techniques and Applications
ResumoIn order to solve the problem that global query can not query heterogeneous data sources,this paper proposes to decompose the global query into sub-queries against heterogeneous data.It designs query decomposition and subquery reconstruction algorithm.Query decomposition is based on JavaCC and JJTree to abstract the global query into a syntax tree.Subquery reconstruction algorithm traversals the syntax tree,chooses different reconstruction algorithms based on the current node type,and constructs the sunquery based on different datasource.
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