16 search results - page 2 / 4 » Weighted Hypertree Decompositions and Optimal Query Plans |
ADHOCNOW
2008
Springer
13 years 6 months ago
2008
Springer
This paper presents a novel method for optimizing sliding window based continuous queries. We deal with two categories of aggregation operations: stepwise aggregation (e.g. COUNT) ...
ICDE
2010
IEEE
13 years 10 months ago
2010
IEEE
— In recent years, the research community introduced various methods for processing skyline queries in multidimensional databases. The skyline operator retrieves all objects bein...
DBPL
1995
Springer
13 years 8 months ago
1995
Springer
Physical design for object-oriented databases is still in its infancy. Implementation decisions often intrude into the conceptual design (such as inverse links and object decompos...
JELIA
2010
Springer
13 years 3 months ago
2010
Springer
Multi-Context Systems (MCS) are formalisms that enable the interlinkage of single knowledge bases, called contexts, via bridge rules. Recently, the evaluation of heterogeneous, no...
DATESO
2008
13 years 6 months ago
2008
Abstract In recent years, many approaches to indexing XML data have appeared. These approaches attempt to process XML queries efficiently and sufficient query plans are built for t...