Mar 23, 2021 · Second, we introduce an algorithm to enhance SHACL shapes with statistical information and to exploit these statistics for join cardinality ...
Mar 23, 2021 · Our extensive experiments on synthetic and real data show that shapes statistics can be generated and managed with only little overhead without ...
We have generated global and shapes statistics and proposed a join ordering technique to make use of these statistics and estimate cardinalities to propose ...
Mar 23, 2021 · In this paper we propose shapes statistics, which extend the recent SHACL standard with statistic information to capture the correlation between classes and ...
Dec 13, 2023 · In this paper, we therefore propose an approach to optimizing SPARQL queries over decentralized knowledge graphs, called Lothbrok.
Apr 15, 2016 · In many SPARQL systems, you can optimize your queries by re-ordering the triples in a graph pattern. In others, you cannot (the query engine optimizes them ...
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Nov 6, 2023 · We propose a set of optimizations that can be applied to a given SPARQL query, and that guarantee that the optimized query has the same answers under bag ...
Abstract. We propose a set of optimizations that can be applied to a given. SPARQL query, and that guarantee that the optimized query has the same answers.
Duration: 0:31
Posted: Feb 26, 2021
Posted: Feb 26, 2021
In our work we tackle this issue by proposing a number of RDF-specific heuristics rather than RDF-specific statistics embedded in relational optimiz- ers ...