251 search results - page 25 / 51 » Optimizing recursive queries in SQL |
FOCS
1991
IEEE
13 years 11 months ago
1991
IEEE
We perform linear programming optimizations on the intersection of k polyhedra in R3 , represented by their outer recursive decompositions, in expected time O(k log k log n + √ ...
SIGMOD
2004
ACM
14 years 7 months ago
2004
ACM
Exploratory ad-hoc queries could return too many answers ? a phenomenon commonly referred to as "information overload". In this paper, we propose to automatically catego...
SIGMOD
2007
ACM
14 years 7 months ago
2007
ACM
Complex queries often contain common or similar subexpressions, either within a single query or among multiple queries submitted as a batch. If so, query execution time can be imp...
EDBT
2008
ACM
14 years 7 months ago
2008
ACM
Scientific data are available through an increasing number of heterogeneous, independently evolving, sources. Although the sources themselves are independently evolving, the data ...
FOIKS
2008
Springer
13 years 9 months ago
2008
Springer
Abstract In this paper we present a new rule-based approach for consistency preserving view updating in deductive databases. Based on rule transformations performed during schema d...