Acyclic Conjunctive Regular Path Queries are no Harder than Corresponding Conjunctive Queries
Summary: Output-sensitive evaluation of acyclic CRPQs matches the best known bounds for corresponding acyclic CQs, parameterized by input/output size and free-connex fractional hypertree width. Thus, RPQ recursion adds no output-sensitive complexity. (summarized by gpt-5.6-luna on Jul 26 2026)
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Authors
- 1. Mahmoud Abo Khamis (RelationalAI)
- 2. Alexandru-Mihai Hurjui (University of Zurich)
- 3. Ahmet Kara (Ostbayerische Technische Hochschule Regensburg)
- 4. Dan Olteanu (University of Zurich)
- 5. Dan Suciu (University of Washington)
BibTeX Citation
@inproceedings{khamis_pods26,
address = {New York, NY, USA},
series = {{PODS} '26},
title = {{Acyclic Conjunctive Regular Path Queries are no Harder than Corresponding Conjunctive Queries}},
url = {https://dl.acm.org/doi/10.1145/3801891},
doi = {10.1145/3801891},
booktitle = {Proceedings of the {ACM} {SIGMOD} Symposium on {Principles} of {Database} {Systems}},
publisher = {Association for Computing Machinery},
author = {Khamis, Mahmoud Abo and Hurjui, Alexandru-Mihai and Kara, Ahmet and Olteanu, Dan and Suciu, Dan},
year = {2026}
}
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