31 search results - page 3 / 7 » Some Algorithmic Improvements for the Containment Problem of... |
WIDM
2003
ACM
13 years 10 months ago
2003
ACM
Query rewriting using views is an essential issue in data integration. A number of algorithms, e.g., the bucket algorithm, the inverse rules algorithm, the SVB algorithm and the M...
PODS
2008
ACM
14 years 5 months ago
2008
ACM
We revisit the classical chase procedure, studying its properties as well as its applicability to standard database problems. We settle (in the negative) the open problem of decid...
ICDT
2012
ACM
11 years 7 months ago
2012
ACM
A universal model of a database D and a set Σ of integrity constraints is a database that extends D, satisfies Σ, and is most general in the sense that it contains sound and co...
SEMWEB
2009
Springer
13 years 11 months ago
2009
Springer
An important application of semantic web technology is recognizing human-defined concepts in text. Query transformation is a strategy often used in search engines to derive querie...
EDBT
2006
ACM
14 years 5 months ago
2006
ACM
The problem of rewriting queries using views has received significant attention because of its applications in a wide variety of datamanagement problems. For select-project-join SQ...