Memory structure and method for tuning a database statement usin

Data processing: database and file management or data structures – Database design – Data structure types

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707 3, 707 4, 707101, G06F 1730

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active

057616540

ABSTRACT:
A method of constructing an aid to tuning of database statements comprises a data structure (stored in a memory on a computer system) which compactly represents that information which is needed about a database statement to determine the optimal series of operations (e.g., table data fetches) needed to execute the statement. The information includes the relationships between tables joined in the statement and the selectivities of logical conditions applied to rows in those tables.

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