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- W4287829755 abstract "This paper introduces a declarative framework to specify and reason about distributions of data over computing nodes in a distributed setting. More specifically, it proposes distribution constraints which are tuple and equality generating dependencies (tgds and egds) extended with node variables ranging over computing nodes. In particular, they can express co-partitioning constraints and constraints about range-based data distributions by using comparison atoms. The main technical contribution is the study of the implication problem of distribution constraints. While implication is undecidable in general, relevant fragments of so-called data-full constraints are exhibited for which the corresponding implication problems are complete for EXPTIME, PSPACE and NP. These results yield bounds on deciding parallel-correctness for conjunctive queries in the presence of distribution constraints." @default.
- W4287829755 created "2022-07-26" @default.
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- W4287829755 date "2020-03-02" @default.
- W4287829755 modified "2023-09-27" @default.
- W4287829755 title "Distribution Constraints: The Chase for Distributed Data" @default.
- W4287829755 doi "https://doi.org/10.48550/arxiv.2003.00965" @default.
- W4287829755 hasPublicationYear "2020" @default.
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