Author

Diego Arroyuelo

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Speeding up Qdags with Generalized Hypertree Decompositions

This paper combines Qdags with a Generalized Hypertree Decomposition of the query, into subqueries with fewer variables, and implements algorithms that find the optimal GHD according to the AGM bounds of the subqueries and the specificities of the Qdag cost model.

Diego Arroyuelo, Gabriel Carmona, Gonzalo Navarro et al. · 0 citations

Jul 2026

Worst-Case Optimal BGPs on Temporal Graphs

An index structure that, for a temporal graph with N edges, requires O(N) space and can evaluate extended BGPs in wco time and yields wco guarantees for related query types, including snapshot evaluation, version queries, and other temporal variants.

Diego Arroyuelo, Aidan Hogan, Gonzalo Navarro et al. · Proceedings of the VLDB Endo... · 0 citations