127 search results - page 2 / 26 » Conjunctive Query Containment under Access Limitations |
TOCL
2008
13 years 5 months ago
2008
PODS
2006
ACM
14 years 5 months ago
2006
ACM
Query containment is a fundamental algorithmic problem in database query processing and optimization. Under set semantics, the query-containment problem for conjunctive queries ha...
ICDT
2009
ACM
14 years 6 months ago
2009
ACM
We study containment and equivalence of (unions of) conjunctive queries on relations annotated with elements of a commutative semiring. Such relations and the semantics of positiv...
ICDT
2012
ACM
11 years 7 months ago
2012
ACM
The problems of query containment, equivalence, and minimization are recognized as very important in the context of query processing, specifically of query optimization. In their...
VLDB
2003
ACM
14 years 5 months ago
2003
ACM
In data applications such as information integration, there can be limited access patterns to relations, i.e., binding patterns require values to be specified for certain attribut...