250 search results - page 20 / 50 » Tree pattern query minimization |
WEBDB
2009
Springer
15 years 4 months ago
2009
Springer
The question whether a given set of views, defined by queries, can be used to answer another query, arises in several contexts such as query optimization, data integration and se...
PODS
2007
ACM
15 years 9 months ago
2007
ACM
The pebble tree automaton and the pebble tree transducer are enhanced by additionally allowing an unbounded number of `invisible' pebbles (as opposed to the usual `visible�...
MICS
2010
14 years 8 months ago
2010
Abstract. A Range Minimum Query asks for the position of a minimal element between two specified array-indices. We consider a natural extension of this, where our further constrai...
MDM
2009
Springer
15 years 4 months ago
2009
Springer
Continuous queries in Wireless Sensor Networks (WSNs) are founded on the premise of Query Routing Tree structures (denoted as T), which provide sensors with a path to the querying...
JGTOOLS
2008
14 years 9 months ago
2008
Hierarchical spatial data structures provide a means for organizing data for efficient processing. Most spatial data structures are optimized for performing queries, such as inters...