3225 search results - page 170 / 645 » Query Optimization by Stored Queries |
ICDE
2010
IEEE
14 years 9 months ago
2010
IEEE
Given a positive value r, a circular range query returns the objects that lie within the distance r of the query location. In this paper, we study the circular range queries that c...
EDBT
2002
ACM
14 years 10 months ago
2002
ACM
Abstract. Estimating the sizes of query results, and intermediate results, is crucial to many aspects of query processing. In particular, it is necessary for effective query optimi...
ICDE
2008
IEEE
14 years 11 months ago
2008
IEEE
With the explosion in the amount of semi-structured data users access and store, there is a need for complex search tools to retrieve often very heterogeneous data in a simple and ...
IPPS
2005
IEEE
14 years 3 months ago
2005
IEEE
Continuous query systems are an intuitive way for users to access streaming data in large-scale scientific applications containing many hundreds of streams. A challenge in these ...
SAC
2008
ACM
13 years 9 months ago
2008
ACM
We address aggregate queries over GIS data and moving object data, where non-spatial information is stored in a data warehouse. We propose a formal data model and query language t...