Method and mechanism for extending native optimization in a database system
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United States of America Patent
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Apr 9, 2002
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N/A
app pub date -
Mar 18, 1999
filing date -
Mar 18, 1999
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Abstract
A method and system for optimizing the execution of database statement is described. An aspect is related to providing a framework for the creation, association, and use of optimizer-related functions to calculate the cost of execution plans involving non-native database entities. Examples of these optimizer-related functions include selectivity, statistics, and costs functions. Another aspect is related to the optimization of database statements having non-boolean predicates. Yet another aspect is related to the determination and use of different granularity levels of information for submitting database statement predicates to optimizer-related functions. Optimizer-related functions can also be defined for system-supplied objects and entities.
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