1004 search results - page 51 / 201 » Safe Constraint Queries |
DLOG
2009
13 years 10 months ago
2009
Abstract. We present a family of expressive extensions of Datalog, called Datalog
DKE
2010
13 years 8 months ago
2010
We describe the Consistency Extractor System (ConsEx) that computes consistent answers to Datalog queries with negation posed to relational databases that may be inconsistent with...
WWW
2001
ACM
14 years 9 months ago
2001
ACM
Integrity constraints are an essential part of a modern schema definition language. They are useful for semantic specification, update consistency control, query optimization, inf...
ECIR
2010
Springer
13 years 6 months ago
2010
Springer
Abstract. Traditional retrieval models assume that query terms are independent and rank documents primarily based on various term weighting strategies including TF-IDF and document...
SIGIR
2011
ACM
12 years 11 months ago
2011
ACM
Large search engines process thousands of queries per second over billions of documents, making query processing a major performance bottleneck. An important class of optimization...