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LOPSTR
2009
Springer
14 years 3 months ago
2009
Springer
We propose a new grouping operator for logic programs based on the group_by operator of SQL. The novelty of our proposal lies in the use of modes, which allows us to relax some rat...
ICALP
1995
Springer
14 years 22 days ago
1995
Springer
We consider the problem of preprocessing an n-vertex digraph with real edge weights so that subsequent queries for the shortest path or distance between any two vertices can be ef...
ER
2001
Springer
14 years 1 months ago
2001
Springer
A Data Warehouse (DW) can be used to integrate data from multiple distributed data sources. A DW can be seen as a set of materialized views that determine its schema and its conten...
MP
2010
13 years 7 months ago
2010
In this paper, we develop a convexification tool that enables the construction of convex hulls for orthogonal disjunctive sets using convex extensions and disjunctive programming...
ICDE
1996
IEEE
14 years 10 months ago
1996
IEEE
Query folding refers to the activity of determining if and how a query can be answered using a given set of resources, which might be materialized views, cached results of previou...