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:
Jul. 10, 2001
Filed:
Feb. 09, 1999
Robert Joseph Bestgen, Dodge Center, MN (US);
Randy Lynn Egan, Rochester, MN (US);
Thomas Paul Giordano, Rochester, MN (US);
Scott Joseph Heimer, Rochester, MN (US);
Carol Ledermann Ramler, Rochester, MN (US);
International Business Machines Corporation, Armonk, NY (US);
Abstract
A method and computer program product are provided for implementing skip key processing for database grouping queries involving aggregate operations using one or more indices in a computer system. First checking for a selected entry in a current group in a primary file is performed. Responsive to finding the selected entry in the current group, the set of records of the current group is ordered to provide an aggregate value in an aggregate field of the current group. Then checking for an excluded value in the aggregate field of the current group is performed. Responsive to not finding the excluded value in the aggregate field, a current entry is saved as a result for the group. Then checking for more groups in the primary file is performed. Responsive to finding more groups in the primary file, a unique key or prefix to the query index is obtained to position to a next group. When the selected entry in the next group is not found, then checking for more groups in the primary file is performed.