Dear all, i have some difficulty with text search in virtuoso using bif:contains property.
if i specified graph name or resource type, the text search query runs extremely slow ~~ but it runs very fast if i remove graph CLAUSE and resource type triple pattern , the two queries are shown bellow. -- extremely slow query PREFIX rdf: <http://www.w3.org/1999/02/22-rdf-syntax-ns#> PREFIX rdfs: <http://www.w3.org/2000/01/rdf-schema#> PREFIX bif: <bif:> SELECT * FROM <http://lod.knps.or.kr/knps> WHERE { ?s rdfs:label ?label . ?label bif:contains "'덕유산'" . ?s rdf:type <http://lod.knps.or.kr/schema/class/NationalPark> .} LIMIT 5 OFFSET 0 -- extremely fast query PREFIX rdf: <http://www.w3.org/1999/02/22-rdf-syntax-ns#> PREFIX rdfs: <http://www.w3.org/2000/01/rdf-schema#> PREFIX bif: <bif:> SELECT * WHERE { ?s rdfs:label ?label . ?label bif:contains "'지리산'" .} i suppose that if i specified the graph name and type of resource using "rdf:type" , the query must run much faster than non-specified query in common sense, am i right? but the query above shows just inverse result about this issue. My question is : 1. what is the reason cause the problem above? 2. if i want to run text search using type and graph specified query, then how can i make it ? thanks . Best Regards -- ================================ Sohn, Taemo LiST Co., Ltd. 9th Floor, Yangyong bldg., 3, Beodeunaru-ro 19-gil, Yeongdeungpo-gu, Seoul, Korea Tel +82 2 2632 5133 Fax +82 2 2632 5134 Mobile +82 10 2647 0108 ================================ ------------------------------------------------------------------------------ Developer Access Program for Intel Xeon Phi Processors Access to Intel Xeon Phi processor-based developer platforms. With one year of Intel Parallel Studio XE. Training and support from Colfax. Order your platform today. http://sdm.link/xeonphi _______________________________________________ Virtuoso-users mailing list Virtuoso-users@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/virtuoso-users
