Sciweavers

610 search results - page 88 / 122
» Efficient Query Evaluation on Probabilistic Databases
Sort
View
192
Voted
SIGMOD
2007
ACM
165views Database» more  SIGMOD 2007»
16 years 25 days 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...
106
Voted
SIGMOD
1998
ACM
143views Database» more  SIGMOD 1998»
15 years 4 months ago
Optimal Multi-Step k-Nearest Neighbor Search
For an increasing number of modern database applications, efficient support of similarity search becomes an important task. Along with the complexity of the objects such as images...
Thomas Seidl, Hans-Peter Kriegel
200
Voted
ICDE
2003
IEEE
161views Database» more  ICDE 2003»
16 years 2 months ago
Structural Join Order Selection for XML Query Optimization
Structural join operations are central to evaluating queries against XML data, and are typically responsible for consuming a lion's share of the query processing time. Thus, ...
Yuqing Wu, Jignesh M. Patel, H. V. Jagadish
SIGMOD
2002
ACM
112views Database» more  SIGMOD 2002»
16 years 25 days ago
Minimal probing: supporting expensive predicates for top-k queries
This paper addresses the problem of evaluating ranked top-? queries with expensive predicates. As major DBMSs now all support expensive user-defined predicates for Boolean queries...
Kevin Chen-Chuan Chang, Seung-won Hwang
188
Voted
SIGMOD
2008
ACM
206views Database» more  SIGMOD 2008»
16 years 25 days ago
Ad-hoc aggregations of ranked lists in the presence of hierarchies
A variety of web sites and web based services produce textual lists at varying time granularities ranked according to several criteria. For example, Google Trends produces lists o...
Nilesh Bansal, Sudipto Guha, Nick Koudas