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SPAA
2009
ACM
14 years 7 months ago
2009
ACM
Hash tables are one of the most fundamental data structures in computer science, in both theory and practice. They are especially useful in external memory, where their query perf...
IJCAI
1997
13 years 8 months ago
1997
Generating query-answering plans for information gathering agents requires to translate a user query, formulated in terms of a set of virtual relations, to a query that uses relat...
COMAD
2009
13 years 8 months ago
2009
The problem of information integration is discussed in the context of answering a query over the web. Querying the web requires that information from different web and other sourc...
PODS
2000
ACM
13 years 11 months ago
2000
ACM
The problem of query containment is fundamental to many aspects of database systems, including query optimization, determining independence of queries from updates, and rewriting ...
DEXA
2005
Springer
14 years 15 days ago
2005
Springer
In relational database systems a combination of privileges and views is employed to limit a user’s access and to hide non-public data. The data privacy problem is to decide wheth...