136 search results - page 3 / 28 » Optimization and Dataflow Algorithms for Nested Tree Queries |
PODS
2008
ACM
14 years 8 months ago
2008
ACM
We consider the navigational core of XPath, extended with two operators: the Kleene star for taking the transitive closure of path expressions, and a subtree relativisation operat...
CIKM
2008
Springer
13 years 10 months ago
2008
Springer
We present in this paper an approach for XQuery optimization that exploits minimization opportunities raised in composition-style nesting of queries. More precisely, we consider t...
SIAMCOMP
2012
11 years 11 months ago
2012
Let S be a set of n intervals in R, and let (S, +) be any commutative semigroup. We assign a weight ω(s) ∈ S to each interval in S. For a point x ∈ R, let S(x) ⊆ S be the se...
ICOODB
2009
13 years 6 months ago
2009
The integration of database and programming languages is made difficult by the different data models and type systems prevalent in each field. Functional-object query languages con...
DMDW
2000
13 years 10 months ago
2000
View materialization is a central issue in logical design of data warehouses since it is one of the most powerful techniques to improve the response to the workload. Most approach...