12 citations · 15 across the 6 of their papers we have counts for
4 papers · 1 filter
Rewriting with Acyclic Queries: Mind Your Head
Gaetano Geck, Jens Keppeler, Thomas Schwentick +1
The paper studies the rewriting problem, that is, the decision problem whether, for a given conjunctive query and a set of views, there is a conjunctive query $Q'…
Distribution Constraints: The Chase for Distributed Data
Gaetano Geck, Frank Neven, Thomas Schwentick
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 distri…
Parallel-Correctness and Containment for Conjunctive Queries with Union and Negation
Gaetano Geck, Bas Ketsman, Frank Neven +1
Single-round multiway join algorithms first reshuffle data over many servers and then evaluate the query at hand in a parallel and communication-free way. A key question is whether…
Parallel-Correctness and Transferability for Conjunctive Queries
Tom J. Ameloot, Gaetano Geck, Bas Ketsman +2
A dominant cost for query evaluation in modern massively distributed systems is the number of communication rounds. For this reason, there is a growing interest in single-round mul…