Sciweavers

Share
552 search results - page 1 / 111
» On the Complexity of Join Predicates
Sort
View
PODS
2001
ACM
135views Database» more  PODS 2001»
12 years 5 months ago
On the Complexity of Join Predicates
We consider the complexity of join problems, focusing on equijoins, spatial-overlap joins, and set-containment joins. We use a graph pebbling model to characterize these joins com...
Jin-yi Cai, Venkatesan T. Chakaravarthy, Raghav Ka...
SSD
2001
Springer
120views Database» more  SSD 2001»
11 years 9 months ago
On Multi-way Spatial Joins with Direction Predicates
Spatial joins are fundamental in spatial databases. Over the last decade, the primary focus of research has been on joins with the predicate “region intersection.” In modern da...
Hongjun Zhu, Jianwen Su, Oscar H. Ibarra
SIGMOD
2003
ACM
129views Database» more  SIGMOD 2003»
12 years 5 months ago
Efficient Processing of Joins on Set-valued Attributes
Object-oriented and object-relational DBMS support setvalued attributes, which are a natural and concise way to model complex information. However, there has been limited research...
Nikos Mamoulis
SIGMOD
1993
ACM
150views Database» more  SIGMOD 1993»
11 years 9 months ago
Predicate Migration: Optimizing Queries with Expensive Predicates
The traditional focus of relational query optimization schemes has been on the choice of join methods and join orders. Restrictions have typically been handled in query optimizers ...
Joseph M. Hellerstein, Michael Stonebraker
SIGMOD
1994
ACM
106views Database» more  SIGMOD 1994»
11 years 9 months ago
Multi-Step Processing of Spatial Joins
Spatial joins are one of the most important operations for combining spatial objects of several relations. In this paper, spatial join processing is studied in detail for extended...
Thomas Brinkhoff, Hans-Peter Kriegel, Ralf Schneid...
books