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. 09, 2010
Filed:
Jul. 02, 2007
Stefano Stefani, Issaquah, WA (US);
Naveen Prakash, Sammamish, WA (US);
Craig S. Freedman, Sammamish, WA (US);
Marcel Van Der Holst, Issaquah, WA (US);
Stefano Stefani, Issaquah, WA (US);
Naveen Prakash, Sammamish, WA (US);
Craig S. Freedman, Sammamish, WA (US);
Marcel van der Holst, Issaquah, WA (US);
Microsoft Corporation, Redmond, WA (US);
Abstract
Disclosed are systems and methods for optimization and efficient processing of MERGE statements. MERGE allows performing a mix of inserts, updates, and deletes in a single statement, and introduces new challenges compared to legacy DML statements, where the kind of action to be performed is hard-coded and known at compile time. Such optimizations may include Halloween Protection detection for MERGE statements, optimized prevention of non-deterministic MERGE statements, in-place inserts for MERGE statements scanning the 'Read Instance' of the target table, and optimized execution of MERGE statements seeking the 'Read Instance' of the target table. Such optimizations may be fundamental in order to ensure proper performance and reliable processing times.