289 search results - page 2 / 58 » Control of an Extensible Query Optimizer: A Planning-Based A... |
EDBTW
2006
Springer
13 years 9 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...
EDBT
2006
ACM
14 years 5 months ago
2006
ACM
In this paper we present a novel approach for estimating the selectivity of XML twig queries. Such a technique is useful for approximate query answering as well as for determining...
IDEAS
2010
IEEE
13 years 3 months ago
2010
IEEE
Even though an effective cost-based query optimizer is of utmost importance for the efficient evaluation of XQuery expressions in native XML database systems, such a component is...
SIGMOD
2001
ACM
14 years 5 months ago
2001
ACM
The ability to approximately answer aggregation queries accurately and efficiently is of great benefit for decision support and data mining tools. In contrast to previous sampling...
IEEEPACT
2002
IEEE
13 years 10 months ago
2002
IEEE
In this paper, we describe an algorithm and implementation of locality optimizations for architectures with instruction sets such as Intel’s SSE and Motorola’s AltiVec that su...