Conceptpossible-worlds model / 可能世界
Possible Worlds Model
A classical framework in database uncertainty theory that describes the distribution over exponentially many possible deterministic worlds in a probabilistic database. It is used to analyze the expected value and distribution of query results over uncertain data.
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Oct 12
The study uses a possible-worlds model to characterize error propagation, where query plans amplify these changes exponentially with the number of rows involved in the answer
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