102 search results - page 1 / 21 » Recursive Query Plans for Data Integration |
JLP
2000
13 years 4 months ago
2000
Generating query-answering plans for data integration systems requires to translate a user query, formulated in terms of a mediated schema, to a query that uses relations that are...
IJCAI
2003
13 years 6 months ago
2003
Information integration systems provide a uniform query interface to a set of sources. One of the key challenges for an information integration system is to provide maximally comp...
ICDE
2008
IEEE
14 years 6 months ago
2008
IEEE
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...
CIKM
2001
Springer
13 years 9 months ago
2001
Springer
Existing approaches for optimizing queries in data integration use decoupled strategies–attempting to optimize coverage and cost in two separate phases. Since sources tend to ha...
IDEAS
2007
IEEE
13 years 11 months ago
2007
IEEE
In this paper we study the problem of deciding whether a regular path query over views in data-integration systems can be re-expressed without recursion. The problem becomes chall...