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The Power of Tree Projections: Local Consistency, Greedy Algorithms, and Larger Islands of Tractability

Summary: Precisely characterizes when local consistency yields global consistency via tree projections: existence of tree projections for certain subqueries is necessary and sufficient, covering both decision and projected-answer tasks. Proposes greedy tree projections and identifies new recognizable islands of tractability and quasi-tractability. (summarized by gpt-5-mini on Feb 09 2026)

Paper ID
1530
Venue
PODS
Year
2010
Pagerank
5.5505938e-05
Overall Rank
7,759 | 46.77%
DOI
10.1145/1807085.1807127

Incoming Non-self Citations Over Time

Authors

BibTeX Citation

@inproceedings{greco_pods10,
        address = {New York, NY, USA},
        series = {{PODS} '10},
        title = {{The Power of Tree Projections: Local Consistency, Greedy Algorithms, and Larger Islands of Tractability}},
        url = {https://dl.acm.org/doi/10.1145/1807085.1807127},
        doi = {10.1145/1807085.1807127},
        booktitle = {Proceedings of the {ACM} {SIGMOD} Symposium on {Principles} of {Database} {Systems}},
        publisher = {Association for Computing Machinery},
        author = {Greco, Gianluigi and Scarcello, Francesco},
        year = {2010}
}

Incoming Citations (Sorted by Pagerank)

Showing 3 of 3 citing papers.

Rank Citing Paper Year Venue Pagerank
814 Hypertree Decompositions: Questions and Answers 2016 PODS 0.00013841737
2,448 Counting Solutions to Conjunctive Queries: Structural and Hybrid Tractability 2014 PODS 8.5693075e-05
3,556 Static Analysis and Optimization of Semantic Web Queries 2012 PODS 7.3113256e-05
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Outgoing Citations (Sorted by Pagerank)

Showing 4 of 4 cited papers.

Citations counted here include only citations to other VLDB/SIGMOD/CIDR/PODS papers in this database.

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