A Unifying Algorithm for Hierarchical Queries
Summary: Hierarchical self-join-free BCQs mark the exact tractability boundary for the bag-set maximization problem—NP-complete for non-hierarchical queries. A single polynomial algorithm over an abstract 2-monoid unifies probabilistic evaluation, Shapley-value computation, and bag-set maximization via different 2-monoid instantiations. (summarized by gpt-5-mini on Feb 11 2026)
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Authors
- 1. Mahmoud Abo Khamis
- 2. Jesse Comer
- 3. Phokion G. Kolaitis
- 4. Sudeepa Roy
- 5. Val Tannen
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| Rank | Cited Paper | Year | Venue | Pagerank |
|---|---|---|---|---|
| 772 | Answering Conjunctive Queries under Updates | 2017 | PODS | 0.00016876498 |
| 4,361 | The Complexity of Resilience and Responsibility for Self-Join-Free Conjunctive Queries | 2016 | VLDB | 6.2559141e-05 |
| 4,937 | New Results for the Complexity of Resilience for Binary Conjunctive Queries with Self-Joins | 2020 | PODS | 5.8187108e-05 |
| 7,022 | A Unified Approach for Resilience and Causal Responsibility with Integer Linear Programming (ILP) and LP Relaxations | 2023 | SIGMOD | 4.8576599e-05 |
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