TKDE
2010
13 years 5 months ago
2010
DHT is a widely used building block for scalable P2P systems. However, as uniform hashing employed in DHTs destroys data locality, it is not a trivial task to support complex queri...
PVLDB
2010
13 years 9 months ago
2010
Uncertain data streams are increasingly common in real-world deployments and monitoring applications require the evaluation of complex queries on such streams. In this paper, we c...
VLDB
2002
ACM
13 years 10 months ago
2002
ACM
The BANKS system enables keyword-based search on databases, together with data and schema browsing. BANKS enables users to extract information in a simple manner without any knowl...
CORR
1999
Springer
13 years 10 months ago
1999
Springer
Complex queries are becoming commonplace, with the growing use of decision support systems. These complex queries often have a lot of common sub-expressions, either within a singl...
BMCBI
2008
13 years 11 months ago
2008
Background: Ontologies such as the Gene Ontology can enable the construction of complex queries over biological information in a conceptual way, however existing systems to do thi...
DMDW
2000
14 years 11 days ago
2000
View materialization is a central issue in logical design of data warehouses since it is one of the most powerful techniques to improve the response to the workload. Most approach...
KR
2010
Springer
14 years 3 months ago
2010
Springer
The DL-Lite family of Description Logics has been designed with the specific goal of allowing for answering complex queries (in particular, conjunctive queries) over ontologies w...
ADC
1994
Springer
14 years 3 months ago
1994
Springer
We present a proposed query language for extended entity relationship schemas. The language improves on previous proposals by using only concepts explicitly in a given schema. It ...
GRID
2003
Springer
14 years 4 months ago
2003
Springer
We are developing a grid information service, RGIS, that is based on the relational data model. RGIS supports complex queries written in SQL that search for compositions (using jo...
DEXA
2003
Springer
14 years 4 months ago
2003
Springer
Query optimizers in current database management systems (DBMS) often face problems such as intolerably long optimization time and/or poor optimization results when optimizing compl...