View matching for materialized outer-join views
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United States of America Patent
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Jul 29, 2008
Grant Date -
Dec 14, 2006
app pub date -
Jun 14, 2005
filing date -
Jun 14, 2005
priority date (Note) -
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status (Latency Note)
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Abstract
A computer implemented system that facilitates view matching for outer join views comprises an interface component that receives at least one query that includes one or more outer join operators. A view matching-component converts the at least one query and outputs a substitute query expression. In accordance with one aspect of the subject invention, the view-matching component can comprise a normalization component that converts the at least one query and at least one materialized view into a normalized query expression and a normalized view expression. Furthermore, the view-matching component can include an analysis component that receives the normalized query expression and the normalized view expression, and a construction component that constructs the substitute query expression.
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