Sciweavers

EDBT
2009
ACM
160views Database» more  EDBT 2009»
13 years 9 months ago
Estimating aggregates in time-constrained approximate queries in Oracle
The concept of time-constrained SQL queries was introduced to address the problem of long-running SQL queries. A key approach adopted for supporting time-constrained SQL queries i...
Ying Hu, Seema Sundara, Jagannathan Srinivasan
EDBT
2009
ACM
156views Database» more  EDBT 2009»
13 years 9 months ago
Secondary bitmap indexes with vertical and horizontal partitioning
Traditional bitmap indexes are utilized as a special type of primary or clustered indexes where the queries are answered by performing fast logical operations supported by hardwar...
Guadalupe Canahuate, Tan Apaydin, Ahmet Sacan, Hak...
EDBT
2009
ACM
173views Database» more  EDBT 2009»
13 years 9 months ago
PROUD: a probabilistic approach to processing similarity queries over uncertain data streams
We present PROUD - A PRObabilistic approach to processing similarity queries over Uncertain Data streams, where the data streams here are mainly time series streams. In contrast t...
Mi-Yen Yeh, Kun-Lung Wu, Philip S. Yu, Ming-Syan C...
EDBT
2009
ACM
108views Database» more  EDBT 2009»
13 years 9 months ago
Reverse k-nearest neighbor search in dynamic and general metric databases
In this paper, we propose an original solution for the general reverse k-nearest neighbor (RkNN) search problem. Compared to the limitations of existing methods for the RkNN searc...
Elke Achtert, Hans-Peter Kriegel, Peer Kröger...
EDBT
2009
ACM
172views Database» more  EDBT 2009»
13 years 9 months ago
Continuous visible nearest neighbor queries
In this paper, we identify and solve a new type of spatial queries, called continuous visible nearest neighbor (CVNN) search. Given a data set P, an obstacle set O, and a query li...
Yunjun Gao, Baihua Zheng, Wang-Chien Lee, Gencai C...
EDBT
2009
ACM
85views Database» more  EDBT 2009»
13 years 9 months ago
Expressive, yet tractable XML keys
Constraints are important for a variety of XML recommendations and applications. Consequently, there are numerous opportunities for advancing the treatment of XML semantics. In pa...
Sven Hartmann, Sebastian Link
EDBT
2009
ACM
156views Database» more  EDBT 2009»
13 years 9 months ago
Evaluating very large datalog queries on social networks
We consider a near future scenario in which users of a Web 2.0 application, such as a social network, contribute to the application not only data, but also rules which automatical...
Royi Ronen, Oded Shmueli
EDBT
2009
ACM
81views Database» more  EDBT 2009»
13 years 9 months ago
Exploiting similarity-aware grouping in decision support systems
Decision Support Systems (DSS) are information systems that support decision making processes. In many scenarios these systems are built on top of data managed by DBMSs and make e...
Yasin N. Silva, Muhammad U. Arshad, Walid G. Aref
EDBT
2009
ACM
100views Database» more  EDBT 2009»
13 years 9 months ago
A view selection algorithm with performance guarantee
A view selection algorithm takes as input a fact table and computes a set of views to store in order to speed up queries. The performance of view selection algorithm is usually me...
Nicolas Hanusse, Sofian Maabout, Radu Tofan
EDBT
2009
ACM
112views Database» more  EDBT 2009»
13 years 9 months ago
GCIP: exploiting the generation and optimization of integration processes
As a result of the changing scope of data management towards the management of highly distributed systems and applications, integration processes have gained in imporuch integrati...
Matthias Böhm, Uwe Wloka, Dirk Habich, Wolfga...