848 search results - page 115 / 170 » Optimization of Sequence Queries in Database Systems |
EDBT
2009
ACM
14 years 3 months ago
2009
ACM
Data stream management systems usually have to process many long-running queries that are active at the same time. Multiple queries can be evaluated more efficiently together tha...
SSD
2005
Springer
14 years 2 months ago
2005
Springer
Abstract. Query optimization is an important functionality of modern database systems and often based on estimating the selectivity of queries before actually executing them. Well-...
ER
2008
Springer
13 years 10 months ago
2008
Springer
Access limitations may occur when querying data sources over the web or heterogeneous data sources presented as relational tables: this happens, for instance, in Data Exchange and ...
STDBM
2004
Springer
14 years 2 months ago
2004
Springer
This paper introduces the Dynamic Cascade Tree (DCT), a structure designed to index query regions on multi-dimensional data streams. The DCT is designed for a stream management sy...
EDBT
2010
ACM
13 years 10 months ago
2010
ACM
Many enterprises nowadays use business processes, based on the BPEL standard, to achieve their goals. Analyzing the execution of such processes is critical for enforcing business ...