708 search results - page 89 / 142 » A Genetic Algorithm for Database Query Optimization |
PODS
2008
ACM
14 years 9 months ago
2008
ACM
We consider a fundamental flow maximization problem that arises during the evaluation of multiple overlapping queries defined on a data stream, in a heterogenous parallel environm...
ICDE
1996
IEEE
14 years 10 months ago
1996
IEEE
This paper presents a difference calculus for determining changes to rule conditions in an active DBMS. The calculus has been used for implementing an algorithm to efficiently mon...
VLDB
2005
ACM
14 years 2 months ago
2005
ACM
As a simple XML query language but with enough expressive power, XPath has become very popular. To expedite evaluation of XPath queries, we consider the problem of rewriting XPath...
VLDB
2004
ACM
14 years 9 months ago
2004
ACM
In this paper, we propose a new tunable index scheme, called iMinMax(), that maps points in highdimensional spaces to single-dimensional values determined by their maximum or minim...
ICDE
2007
IEEE
14 years 3 months ago
2007
IEEE
Privacy is a serious concern when microdata need to be released for ad hoc analyses. The privacy goals of existing privacy protection approaches (e.g., -anonymity and -diversity) ...