508 search results - page 21 / 102 » Bringing Order to Query Optimization |
EDBT
2004
ACM
14 years 7 months ago
2004
ACM
Abstract. Non-contiguous subsequence pattern queries search for symbol instances in a long sequence that satisfy some soft temporal constraints. In this paper, we propose a methodo...
IPPS
2007
IEEE
14 years 2 months ago
2007
IEEE
We study efficient query processing in distributed web search engines with global index organization. The main performance bottleneck in this case is due to the large amount of i...
EDBTW
2006
Springer
13 years 11 months ago
2006
Springer
A data stream management system executes a large number of continuous queries in parallel. As stream characteristics and query workload change over time, the plan initially install...
DEXA
2008
Springer
13 years 9 months ago
2008
Springer
The query performance for tracing tags depends upon the distribution of tag trajectories in the data space. We examine a more efficient representation of tag trajectories by means ...
ICDE
2006
IEEE
14 years 1 months ago
2006
IEEE
The window query model is widely used in data stream management systems where the focus of a continuous query is limited to a set of the most recent tuples. In this dissertation, ...