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SIGMOD
2004
ACM
14 years 7 months ago
2004
ACM
We present the Priority R-tree, or PR-tree, which is the first R-tree variant that always answers a window query using O((N/B)1-1/d + T/B) I/Os, where N is the number of ddimensio...
SIGMOD
2004
ACM
14 years 7 months ago
2004
ACM
Sovereign information sharing allows autonomous entities to compute queries across their databases in such a way that nothing apart from the result is revealed. We describe an imp...
SIGMOD
2004
ACM
14 years 7 months ago
2004
ACM
We demonstrate an XML full-text search engine that implements the TeXQuery language. TeXQuery is a powerful fulltext search extension to XQuery that provides a rich set of fully c...
SIGMOD
2004
ACM
14 years 7 months ago
2004
ACM
Exploratory ad-hoc queries could return too many answers ? a phenomenon commonly referred to as "information overload". In this paper, we propose to automatically catego...
SIGMOD
2004
ACM
14 years 7 months ago
2004
ACM
The increasing use of temporal and spatial data in presentday relational systems necessitates an efficient support of joins on interval-valued attributes. Standard join algorithms...