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» Executing SPARQL Queries over the Web of Linked Data
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DEBU
2000
147views more  DEBU 2000»
13 years 7 months ago
XJoin: A Reactively-Scheduled Pipelined Join Operator
Wide-area distribution raises significant performance problems for traditional query processing techniques as data access becomes less predictable due to link congestion, load imb...
Tolga Urhan, Michael J. Franklin
WWW
2007
ACM
14 years 8 months ago
Optimized query planning of continuous aggregation queries in dynamic data dissemination networks
Continuous queries are used to monitor changes to time varying data and to provide results useful for online decision making. Typically a user desires to obtain the value of some ...
Rajeev Gupta, Krithi Ramamritham
APWEB
2010
Springer
14 years 8 days ago
Optimizing Query Processing for the Hidden Web
Abstract. The term Deep Web (sometimes also called Hidden Web) refers to the data content that is created dynamically as the result of a specific search on the Web. In this respec...
Andrea Calì, Davide Martinenghi
PVLDB
2010
98views more  PVLDB 2010»
13 years 5 months ago
Dremel: Interactive Analysis of Web-Scale Datasets
Dremel is a scalable, interactive ad-hoc query system for analysis of read-only nested data. By combining multi-level execution trees and columnar data layout, it is capable of ru...
Sergey Melnik, Andrey Gubarev, Jing Jing Long, Geo...
ICDE
2008
IEEE
127views Database» more  ICDE 2008»
14 years 8 months ago
Querying Data under Access Limitations
Data sources on the web are often accessible through web interfaces that present them as relational tables, but require certain attributes to be mandatorily selected, e.g., via a w...
Andrea Calì, Davide Martinenghi