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Query Evaluation with Soft-Key Constraints

Summary: Introduce soft-key constraints for probabilistic DBs that penalize key violations and model distributions as Markov networks with per-tuple and per-key cardinality potentials. Provide two polynomial-time algorithms for conjunctive-query marginals (single-relation and multi-relation), prove dichotomy to #P-hardness otherwise, and give a syntactic safety criterion: safe iff safe after making each key hard or removed. (summarized by gpt-5-mini on Feb 09 2026)

Paper ID
1452
Venue
PODS
Year
2008
Pagerank
4.1945683e-05
Overall Rank
12,356 | 14.05%
DOI
-

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