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:
Aug. 29, 1995
Filed:
Aug. 03, 1992
George P Copeland, Austin, TX (US);
Richard D Hoffman, Austin, TX (US);
Timothy R Malkemus, Unionville, CA;
Marc G Smith, Austin, TX (US);
International Business Machines Corporation, Armonk, NY (US);
Abstract
A method, system and process for providing an improved database blocking technique for updatable and scrollable cursors is disclosed. The invention is facilitated by the operation of a process in the memory of a processor. The processor, under the control of the process, builds a reserved area in the memory of the computer. The reserved area in the memory contains an image of a portion of the information residing on disk in the database. When an application opens a cursor to a database, the type of blocking is specified for that cursor. The application issues a fetch request, and if the row is not in the block in the reserved area in the memory, then a remote procedure call is performed to get the required next block of rows and return the block containing the rows back to the application. Various lock data structures are employed to manage and control the processing.