116 search results - page 12 / 24 » Database querying under changing preferences |
SIGMOD
2002
ACM
14 years 7 months ago
2002
ACM
This paper addresses the problem of evaluating ranked top-? queries with expensive predicates. As major DBMSs now all support expensive user-defined predicates for Boolean queries...
ICDE
2006
IEEE
14 years 8 months ago
2006
IEEE
Adaptivity is a challenging open issue in data stream management. In this paper, we tackle the problem of memory adaptivity inside a system executing temporal sliding window queri...
ECIR
2009
Springer
13 years 5 months ago
2009
Springer
Abstract. The structural heterogeneity and complexity of XML repositories makes query formulation challenging for users who have little knowledge of XML. To assist its users, an XM...
ICDE
2005
IEEE
14 years 1 months ago
2005
IEEE
Current federated systems deploy cost-based query optimization mechanisms; i.e., the optimizer selects a global query plan with the lowest cost to execute. Thus, cost functions in...
ADC
2005
Springer
14 years 1 months ago
2005
Springer
In this paper we attempt to parallelise a commodity database for OLAP on a cluster of commodity PCs by using a distributed high-performance storage subsystem. By parallelising the...