188 search results - page 12 / 38 » Query evaluation with soft-key constraints |
PVLDB
2010
13 years 5 months ago
2010
Violations of functional dependencies (FDs) are common in practice, often arising in the context of data integration or Web data extraction. Resolving these violations is known to...
LICS
2002
IEEE
14 years 9 days ago
2002
IEEE
We study relations on trees defined by first-order constraints over a vocabulary that includes the tree extension relation Ì Ì ¼, holding if and only if every branch of Ì ex...
DEXAW
2007
IEEE
13 years 11 months ago
2007
IEEE
The problem of efficiently evaluating XPath and XQuery queries has become increasingly significant since more and more XML data is stored in its native form. We propose a novel op...
EDBT
2009
ACM
13 years 11 months ago
2009
ACM
We investigate the problem of refining SQL queries to satisfy cardinality constraints on the query result. This has applications to the many/few answers problems often faced by da...
SARA
2007
Springer
14 years 1 months ago
2007
Springer
Constraint Programming is a powerful approach for modeling and solving many combinatorial problems, scalability, however, remains an issue in . Abstraction and reformulation techni...