10 search results - page 2 / 2 » Query Rewriting under Non-Guarded Rules |
CAISE
2005
Springer
13 years 10 months ago
2005
Springer
Abstract. Recently, the database and AI research communities have paid increased attention to ontologies. The main motivating reason is that ontologies promise solutions for comple...
SIGMOD
2009
ACM
14 years 5 months ago
2009
ACM
We present a complete XPath cost-based optimization and execution framework and demonstrate its effectiveness and efficiency for a variety of queries and datasets. The framework i...
VLDB
2007
ACM
14 years 5 months ago
2007
ACM
Query generators producing sequences of SQL statements are embedded in many applications. As the execution time of such sequences is often far from optimal, their optimization is ...
ICDE
2007
IEEE
14 years 6 months ago
2007
IEEE
Logical constraints, (e.g., 'phone numbers in toronto can have prefixes 416, 647, 905 only'), are ubiquitous in relational databases. Traditional integrity constraints, ...
ENTCS
2006
13 years 5 months ago
2006
Model transformation means converting an input model available at the beginning of the transformation process to an output model. A widely used approach to model transformation us...