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SIGMOD
2011
ACM
169views Database» more  SIGMOD 2011»
13 years 1 months ago
Leveraging query logs for schema mapping generation in U-MAP
In this paper, we introduce U-MAP, a new system for schema mapping generation. U-MAP builds upon and extends existing schema mapping techniques. However, it mitigates some key pro...
Hazem Elmeleegy, Ahmed K. Elmagarmid, Jaewoo Lee
ICDE
2004
IEEE
85views Database» more  ICDE 2004»
15 years 3 days ago
Selectivity Estimation for String Predicates: Overcoming the Underestimation Problem
Queries with (equality or LIKE) selection predicates over string attributes are widely used in relational databases. However, state-of-the-art techniques for estimating selectivit...
Surajit Chaudhuri, Venkatesh Ganti, Luis Gravano
ISPA
2007
Springer
14 years 4 months ago
Distributed Multi-source Regular Path Queries
Regular path queries are the building block of almost any mechanism for querying semistructured data. Despite the fact that the main applications of such data are distributed, ther...
Maryam Shoaran, Alex Thomo
XSYM
2007
Springer
168views Database» more  XSYM 2007»
14 years 4 months ago
Dynamic Fusion of Web Data
: Mashups exemplify a workflow-like approach to dynamically integrate data and services from multiple web sources. Such integration workflows can build on existing services for web...
Erhard Rahm, Andreas Thor, David Aumueller
DEXAW
1996
IEEE
79views Database» more  DEXAW 1996»
14 years 2 months ago
Managing Multiple Representations of Georeferenced Elements
This paper presents a framework for the management of multiple representations of georeferenced elements in a GIS environment. This solution is presented from a database perspecti...
Claudia Bauzer Medeiros, Marie-Jo Bellosta, Genevi...