115 search results - page 4 / 23 » Predicate Migration: Optimizing Queries with Expensive Predi... |
DASFAA
2006
IEEE
14 years 17 hour ago
2006
IEEE
As business and enterprises generate and exchange XML data more often, there is an increasing need for searching and querying XML data. A lot of researches have been done to match ...
VLDB
2005
ACM
13 years 11 months ago
2005
ACM
Cost-based query optimizers need to estimate the selectivity of conjunctive predicates when comparing alternative query execution plans. To this end, advanced optimizers use multi...
COMPGEOM
2006
ACM
13 years 12 months ago
2006
ACM
This paper examines the computation of the Voronoi diagram of a set of ellipses in the Euclidean plane. We propose the first complete algorithms, under the exact computation para...
GEOINFORMATICA
2008
13 years 6 months ago
2008
Topological relationships like overlap, inside, meet, and disjoint uniquely characterize the relative position between objects in space. For a long time, they have been a focus of...
VLDB
2007
ACM
14 years 6 months ago
2007
ACM
In this paper we argue that developing information extraction (IE) programs using Datalog with embedded procedural extraction predicates is a good way to proceed. First, compared ...