170 search results - page 4 / 34 » Approximate Range Selection Queries in Peer-to-Peer Systems |
PODS
2002
ACM
14 years 6 months ago
2002
ACM
Data Warehousing and OLAPapplications typically view data as having multiple logical dimensions e.g., product, location with natural hierarchies de ned on each dimension. OLAP que...
SIGIR
2012
ACM
11 years 8 months ago
2012
ACM
We propose a mathematical framework for query selection as a mechanism for reducing the cost of constructing information retrieval test collections. In particular, our mathematica...
ICDE
2004
IEEE
14 years 7 months ago
2004
IEEE
We examine the problem of evaluating selection queries over imprecisely represented objects. Such objects are used either because they are much smaller in size than the precise on...
SIGMOD
1996
ACM
13 years 10 months ago
1996
ACM
Many commercial database systems maintain histograms to summarize the contents of relations and permit efficient estimation of query result sizes and access plan costs. Although s...
IWMMDBMS
1996
13 years 7 months ago
1996
The maintenance of large raster images under spatial operations is still a major performance bottleneck. For reasons of storage space, images in a collection, such as satellite pi...