Sciweavers

1394 search results - page 55 / 279
» Executing Nested Queries
Sort
View
PVLDB
2010
114views more  PVLDB 2010»
15 years 2 months ago
ObjectRunner: Lightweight, Targeted Extraction and Querying of Structured Web Data
We present in this paper ObjectRunner, a system for extracting, integrating and querying structured data from the Web. Our system harvests real-world items from template-based HTM...
Talel Abdessalem, Bogdan Cautis, Nora Derouiche
PODS
2008
ACM
204views Database» more  PODS 2008»
16 years 4 months ago
Annotated XML: queries and provenance
We present a formal framework for capturing the provenance of data appearing in XQuery views of XML. Building on previous work on relations and their (positive) query languages, w...
J. Nathan Foster, Todd J. Green, Val Tannen
ICDE
2001
IEEE
141views Database» more  ICDE 2001»
16 years 5 months ago
Processing Queries with Expensive Functions and Large Objects in Distributed Mediator Systems
LeSelect is a mediator system which allows scientists to publish their resources (data and programs) so they can be transparently accessed. The scientists can typically issue quer...
Fabio Porto, Françoise Fabret, Luc Bouganim...
223
Voted
VLDB
2007
ACM
190views Database» more  VLDB 2007»
16 years 4 months ago
Request Window: an Approach to Improve Throughput of RDBMS-based Data Integration System by Utilizing Data Sharing Across Concur
This paper focuses on the problem of improving distributed query throughput of the RDBMS-based data integration system that has to inherit the query execution model of the underly...
Rubao Lee, Minghong Zhou, Huaming Liao
153
Voted
BTW
2007
Springer
142views Database» more  BTW 2007»
15 years 10 months ago
Algebraic Query Optimization for Distributed Top-k Queries
: Distributed top-k query processing is increasingly becoming an essential functionality in a large number of emerging application classes. This paper addresses the efficient alge...
Thomas Neumann, Sebastian Michel