491 search results - page 52 / 99 » Optimizing complex queries with multiple relation instances |
SAC
2009
ACM
14 years 2 months ago
2009
ACM
XML data warehouses form an interesting basis for decisionsupport applications that exploit heterogeneous data from multiple sources. However, XML-native database systems currentl...
EDBT
2011
ACM
12 years 11 months ago
2011
ACM
The popularity of batch-oriented cluster architectures like Hadoop is on the rise. These batch-based systems successfully achieve high degrees of scalability by carefully allocati...
DAGSTUHL
2004
13 years 9 months ago
2004
We present the Priority R-tree, or PR-tree, which is the first R-tree variant that always answers a window query using O((N/B)1-1/d + T/B) I/Os, where N is the number of ddimensio...
FGCS
2006
13 years 7 months ago
2006
This work introduces a method for instrumenting applications, producing execution traces, and visualizing multiple trace instances to identify performance features. The approach p...
ICDE
2004
IEEE
14 years 9 months ago
2004
IEEE
Twig queries represent the building blocks of declarative query languages over XML data. A twig query describes a complex traversal of the document graph and generates a set of el...