Sciweavers

1588 search results - page 178 / 318
» Consistent query answering in databases
Sort
View
VLDB
2002
ACM
126views Database» more  VLDB 2002»
15 years 4 months ago
FAS - A Freshness-Sensitive Coordination Middleware for a Cluster of OLAP Components
Data warehouses offer a compromise between freshness of data and query evaluation times. However, a fixed preference ratio between these two variables is too undifferentiated. Wit...
Uwe Röhm, Klemens Böhm, Hans-Jörg S...
SIGMOD
2007
ACM
165views Database» more  SIGMOD 2007»
16 years 5 months ago
Sharing aggregate computation for distributed queries
An emerging challenge in modern distributed querying is to efficiently process multiple continuous aggregation queries simultaneously. Processing each query independently may be i...
Ryan Huebsch, Minos N. Garofalakis, Joseph M. Hell...
PODS
2009
ACM
130views Database» more  PODS 2009»
16 years 5 months ago
Secondary indexing in one dimension: beyond b-trees and bitmap indexes
Let be a finite, ordered alphabet, and consider a string x = x1x2 . . . xn n . A secondary index for x answers alphabet range queries of the form: Given a range [al, ar] , retu...
Rasmus Pagh, Srinivasa Rao Satti
146
Voted
DEXAW
2002
IEEE
102views Database» more  DEXAW 2002»
15 years 10 months ago
Indexing Mobile Objects on the Plane
We present a method to index objects moving on the plane in order to efficiently answer range queries about their position in the future. This problem is motivated by real-life a...
Dimitris Papadopoulos, George Kollios, Dimitrios G...
ESORICS
2007
Springer
15 years 11 months ago
Encryption Techniques for Secure Database Outsourcing
Abstract. While the idea of database outsourcing is becoming increasingly popular, the associated security risks still prevent many potential users from deploying it. In particular...
Sergei Evdokimov, Oliver Günther