2223 search results - page 21 / 445 » Query Optimization in an OODBMS |
VLDB
1999
ACM
13 years 11 months ago
1999
ACM
The problem of nding the best answers to a query quickly, rather than nding all answers, is of increasing importance as relational databases are applied in multimedia and decision...
PODS
2001
ACM
14 years 7 months ago
2001
ACM
The need to search for complex and recurring patterns in database sequences is shared by many applications. In this paper, we discuss how to express and support efficiently sophis...
SIGMOD
1993
ACM
13 years 11 months ago
1993
ACM
Abstract: We propose a framework for the specification of extensible database systems. A particular goal is to implement a software component for parsing and rule-based optimizatio...
DLOG
2011
12 years 11 months ago
2011
Query answering in Ontology Based Data Access (OBDA) exploits the knowledge of an ontology’s TBox to deal with incompleteness of the ABox (or data source). Current query-answerin...
PODS
2010
ACM
14 years 14 days ago
2010
ACM
Both semantic and type-based query optimization rely on the idea that queries often exhibit non-trivial rewritings if the state space of the database is restricted. Despite their ...