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EDOC
2011
IEEE
13 years 9 months ago
2011
IEEE
—In this paper, we present a UML metamodel-based approach for creating and executing workflow models. The modeling language is introduced through its abstract syntax, and an eval...
ICDE
2010
IEEE
15 years 9 months ago
2010
IEEE
Estimation via sampling out of highly selective join queries is well known to be problematic, most notably in online aggregation. Without goal-directed sampling strategies, samples...
BTW
2005
Springer
15 years 3 months ago
2005
Springer
: User-defined data types such as intervals require specialized access methods to be efficiently searched and queried. As database implementors cannot provide appropriate index str...
JAR
2006
14 years 9 months ago
2006
We describe an algorithm for deciding the first-order multisorted theory BAPA, which combines 1) Boolean algebras of sets of uninterpreted elements (BA) and 2) Presburger arithmeti...
EUROPAR
2003
Springer
15 years 2 months ago
2003
Springer
We consider the use of a cluster of PC servers for Application Service Providers where applications and databases must remain autonomous. We use data replication to improve data av...