651 search results - page 75 / 131 » Algebraic Query Optimization for Distributed Top-k Queries |
PODS
2010
ACM
14 years 2 months ago
2010
ACM
A fundamental problem in data management is to draw a sample of a large data set, for approximate query answering, selectivity estimation, and query planning. With large, streamin...
JAR
2006
13 years 9 months ago
2006
We describe an algorithm for deciding the first-order multisorted theory BAPA, which combines 1) Boolean algebras of sets of uninterpreted elements (BA) and 2) Presburger arithmeti...
ICWE
2009
Springer
14 years 3 months ago
2009
Springer
DeXIN (Distributed extended XQuery for data INtegration) integrates multiple, heterogeneous, highly distributed and rapidly changing web data sources in different formats, e.g. XML...
ICDE
1994
IEEE
14 years 1 months ago
1994
IEEE
We describe the design of Mariposa, an experimental distributed data management system that provides high performance in an environment of high data mobility and heterogeneous hos...
ICDE
2004
IEEE
14 years 10 months ago
2004
IEEE
Twig queries represent the building blocks of declarative query languages over XML data. A twig query describes a complex traversal of the document graph and generates a set of el...