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Rewriting Aggregate Queries using Description Logic

12 years 1 months ago
Rewriting Aggregate Queries using Description Logic
This paper presents an application of a DL reasoner to the optimization of an object-relational query language. Queries containing aggregate functions are difficult to optimize because care must be taken to guarantee that the output value of the aggregate function is not affected. We present a mapping from an objectrelational aggregate query to a DL implication problem such that satisfaction of the implication is a sufficient condition for the correctness of a particular logical rewrite rule with respect to a given schema.
David DeHaan, David Toman, Grant E. Weddell
Added 31 Oct 2010
Updated 31 Oct 2010
Type Conference
Year 2003
Where DLOG
Authors David DeHaan, David Toman, Grant E. Weddell
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