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:
Jan. 31, 1995
Filed:
Nov. 12, 1992
James R Boykin, Pflugerville, TX (US);
Lisa A Geer, Elgin, TX (US);
Gary R Horn, Austin, TX (US);
Timothy R Malkemus, Round Rock, TX (US);
International Business Machines Corporation, Armonk, NY (US);
Abstract
A system and method for enforcing referential integrity within a database system provides for determination of relevant referential constraints at compile time for an access plan. All referential constraints which are relevant to data changes to the database are identified when the access plan is created. Code necessary for performing referential constraint checks is inserted directly into the access plan at compile time, eliminating the necessity for determining the relevant constraints at run time. Constraint checking can be performed using substantially the same low-level procedural statements already used in the access plan for performing database accesses.