136 search results - page 16 / 28 » Query optimizer for spatial join operations |
GVD
2003
13 years 9 months ago
2003
Several mapping schemes have recently been proposed to store XML data in relational tables. Relational database systems are readily available and can handle vast amounts of data v...
SIGMOD
2010
ACM
14 years 21 days ago
2010
ACM
The probabilistic threshold query (PTQ) is one of the most common queries in uncertain databases, where all results satisfying the query with probabilities that meet the threshold...
VLDB
1995
ACM
13 years 11 months ago
1995
ACM
Efficient processing of aggregation queries is essential for decision support applications. This paper describes a class of query transformations, called eager aggregation and lat...
DASFAA
2007
IEEE
14 years 2 months ago
2007
IEEE
Finding all the occurrences of a twig pattern on multiple elements in an XML document is a core operation for efficient evaluation of XML queries. Holistic twig join algorithms, Tw...
WWW
2007
ACM
14 years 8 months ago
2007
ACM
Most RDF query languages allow for graph structure search through a conjunction of triples which is typically processed using join operations. A key factor in optimizing joins is ...