Woodcock Washburn LLP
System and method for cardinality estimation based on query execution feedback
During query execution, statistics associated with expressions are observed. Such observed statistics preferably include the cardinality of each expression. The observed statistics are submitted to an expression manager as feedback from the executed query. The statistics are preferably stored for use in estimating the cardinality of execution plans for future queries.
Microsoft Corporation
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Y10S G06F Y10S G06F
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Milind M. Cesar A. Florian M.
Joshi Galindo-Legaria Waas