50 search results - page 5 / 10 » Conditional Selectivity for Statistics on Query Expressions |
RIAO
2000
13 years 9 months ago
2000
We propose an original approach for the characterization of video dynamic content with a view to supplying new functionalities for motion-based video indexing and retrieval with q...
ICDE
2009
IEEE
14 years 2 months ago
2009
IEEE
— Complex ad hoc join queries over enterprise databases are commonly used by business data analysts to understand and analyze a variety of enterprise-wide processes. However, eff...
PVLDB
2010
13 years 6 months ago
2010
Optimization of join queries based on average selectivities is suboptimal in highly correlated databases. In such databases, relations are naturally divided into partitions, each ...
SIGMOD
2009
ACM
14 years 8 months ago
2009
ACM
Users often try to accumulate information on a topic of interest from multiple information sources. In this case a user's informational need might be expressed in terms of an...
ICDE
2009
IEEE
14 years 2 months ago
2009
IEEE
— Existing stream processing systems are optimized for a specific metric, which may limit their applicability to diverse applications and environments. This paper presents XFlow...