Representing user-defined routines with defined data structures
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United States of America Patent
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Dec 11, 2012
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app pub date -
Dec 18, 2002
filing date -
Dec 18, 2002
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Abstract
A database system constructs representation for predicate expressions invoking user-defined routines. A first representation is constructed if an indicator has a first value, and a second representation is constructed if the indicator has a second value. Based on which representation is used, an optimizer in the database system selects use of indexing and/or statistics and/or other performance-enhancement features in generating a query plan.
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