Technique for detecting a subsuming temporal relationship of valid time data in a relational database management system
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United States of America Patent
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Nov 11, 2003
Grant Date -
N/A
app pub date -
Jan 28, 2000
filing date -
Jan 28, 2000
priority date (Note) -
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Abstract
A method, apparatus, and article of manufacture for detecting subsuming temporal relationships in a relational database. In accordance with the present invention, an invocation of a within operation that specifies a first event and a second event is received. In response to the invocation, a combination of temporal relationships between the first event and the second event is evaluated to determine (1) whether the second event starts at the same time as the first event or whether the second event starts before the first event and (2) whether the second event ends at the same time as the first event or whether the second event ends after the first event.
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