The Limits of Efficiency for Open- and Closed-World Query Evaluation Under Guarded TGDs
Summary: Pinpoints the tractability frontier: OMQ evaluation under guarded TGDs is FPT iff the UCQ is equivalent to one of bounded treewidth (under standard assumptions). Shows a parallel dichotomy for CQSs (guarded and frontier‑guarded with bounded head size), links OMQ and CQS evaluation, and analyzes the meta-decision problems (bounded arity assumed). (summarized by gpt-5-mini on Feb 09 2026)
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Authors
- 1. Pablo Barceló
- 2. Victor Dalmau
- 3. Cristina Feier
- 4. Carsten Lutz
- 5. Andreas Pieris
Incoming Citations (Sorted by Pagerank)
Showing 2 of 2 citing papers.
| Rank | Citing Paper | Year | Venue | Pagerank |
|---|---|---|---|---|
| 8,995 | Efficiently Enumerating Answers to Ontology-Mediated Queries | 2022 | PODS | 4.412512e-05 |
| 9,046 | Non-Uniformly Terminating Chase: Size and Complexity | 2022 | PODS | 4.4039656e-05 |
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Outgoing Citations (Sorted by Pagerank)
Showing 5 of 5 cited papers.
Citations counted here include only citations to other VLDB/SIGMOD/CIDR/PODS papers in this database.
| Rank | Cited Paper | Year | Venue | Pagerank |
|---|---|---|---|---|
| 38 | Testing Implications Of Data Dependencies | 1979 | SIGMOD | 0.00075110004 |
| 144 | Testing Containment of Conjunctive Queries Under Functional and Inclusion Dependencies (Extended Abstract) | 1982 | PODS | 0.00041462501 |
| 431 | On the Complexity of Database Queries (Extended Abstract) | 1997 | PODS | 0.00023370207 |
| 6,143 | Ontology-based Data Access: A Study through Disjunctive Datalog, CSP, and MMSNP | 2013 | PODS | 5.1889914e-05 |
| 11,829 | Semantic Acyclicity Under Constraints | 2016 | PODS | 4.1945683e-05 |
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