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New Technology of Library and Information Service  2012, Vol. Issue (10): 42-48    DOI: 10.11925/infotech.1003-3513.2012.10.07
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The Optimization of SPARQL Query
Xu Lei
Center for the Studies of Information Resources, Wuhan University, Wuhan 430072, China
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Abstract  In order to improve SPARQL query efficiency, this paper uses RDF schema to simplify the BGP of SPARQL, and then estimates each node’cardinality and the weight of each edge through B-tree indexes quickly. After that, it uses the methods of joining cost estimation and dynamic programming for the optimal logical query plan. The result of the experiment shows that the new method improves the SPARQL query efficiency,while the performance of this method is as good as Sesame, and much better than Jena.
Key wordsSPARQL      Query optimization      RDF schema      Joining cost      Dynamic programming     
Received: 07 October 2012      Published: 24 January 2013
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Xu Lei. The Optimization of SPARQL Query. New Technology of Library and Information Service, 2012, (10): 42-48.

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https://manu44.magtech.com.cn/Jwk_infotech_wk3/EN/10.11925/infotech.1003-3513.2012.10.07     OR     https://manu44.magtech.com.cn/Jwk_infotech_wk3/EN/Y2012/V/I10/42

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