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- W3022012018 abstract "Executing aggregate queries on the web of data allows to compute useful statistics ranging from the number of properties per class in a dataset to the average life of famous scientists per country. However, processing aggregate queries on public SPARQL endpoints is challenging, mainly due to quotas enforcement that prevents queries to deliver complete results. Existing distributed query engines allow to go beyond quota limitations, but their data transfer and execution times are clearly prohibitive when processing aggregate queries. Following the web preemption model, we define a new preemptable aggregation operator that allows to suspend and resume aggregate queries. Web preemption allows to continue query execution beyond quota limits and server-side aggregation drastically reduces data transfer and execution time of aggregate queries. Experimental results demonstrate that our approach outperforms existing approaches by orders of magnitude in terms of execution time and the amount of transferred data." @default.
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- W3022012018 date "2020-01-01" @default.
- W3022012018 modified "2023-10-17" @default.
- W3022012018 title "Processing SPARQL Aggregate Queries with Web Preemption" @default.
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- W3022012018 doi "https://doi.org/10.1007/978-3-030-49461-2_14" @default.
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