342 search results - page 11 / 69 » Conjunctive Queries over Trees |
EDBT
2006
ACM
14 years 7 months ago
2006
ACM
Scientific data in the life sciences is distributed over various independent multi-format databases and is constantly expanding. We discuss a scenario where a life science research...
LICS
2005
IEEE
14 years 1 months ago
2005
IEEE
We consider unranked trees, that have become an active subject of study recently due to XML applications, and characterize commonly used fragments of firstorder (FO) and monadic ...
CORR
2004
Springer
13 years 7 months ago
2004
Springer
Abstract. Spatial conjunction is a powerful construct for reasoning about dynamically allocated data structures, as well as concurrent, distributed and mobile computation. While re...
VLDB
2000
ACM
13 years 11 months ago
2000
ACM
We present the TreeScape system that, unlike any other system known to the authors, enables the reuse of pre-computed aggregate query results for irregular dimension hierarchies, ...
BTW
2009
Springer
14 years 11 days ago
2009
Springer
: Cost-based optimizers in relational databases make use of data statistics to estimate intermediate result cardinalities. Those cardinalities are needed to estimate access plan co...