The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Mar. 20, 2012
Filed:
Aug. 13, 2008
Nicolas Bruno, Redmond, WA (US);
Surajit Chaudhuri, Redmond, WA (US);
Nicolas Bruno, Redmond, WA (US);
Surajit Chaudhuri, Redmond, WA (US);
Microsoft Corporation, Redmond, WA (US);
Abstract
Described is a constraint language and related technology by which complex constraints may be used in selecting configurations for use in physical database design tuning. The complex constraint (or constraints) is processed, e.g., in a search framework, to determine and output at least one configuration that meets the constraint, e.g., a best configuration found before a stopping condition is met. The search framework processes a current configuration into candidate configurations, including by searching for candidate configurations from a current configuration based upon a complex constraint, iteratively evaluating a search space until a stopping condition is satisfied, using transformation rules to generate new candidate configurations, and selecting a best candidate configuration. Transformation rules and pruning rules are applied to efficiently perform the search. Constraints may be specified as assertions that need to be satisfied, or as soft assertions that come close to satisfying the constraint.