Invention Grant
- Patent Title: Optimizing a computer database query that fetches N rows
- Patent Title (中): 优化获取N行的计算机数据库查询
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Application No.: US11864913Application Date: 2007-09-29
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Publication No.: US07756861B2Publication Date: 2010-07-13
- Inventor: Brian Robert Muras , Robert Russell Nelson , John Matthew Santosuosso
- Applicant: Brian Robert Muras , Robert Russell Nelson , John Matthew Santosuosso
- Applicant Address: US NY Armonk
- Assignee: International Business Machines Corporation
- Current Assignee: International Business Machines Corporation
- Current Assignee Address: US NY Armonk
- Agency: Martin & Associates, LLC
- Agent Bret J. Petersen
- Main IPC: G06F17/30
- IPC: G06F17/30

Abstract:
An apparatus and method to optimize a query access plan in a computer database system. In preferred embodiments, the query optimizer determines the query can be optimized and generates for the query an optimized access plan that eliminates records defined by a Where clause and one or more ordering criteria prior to ordering the records (sorting or grouping) and then returning a first n rows.
Public/Granted literature
- US20080021869A1 APPARATUS AND METHOD FOR OPTIMIZING A COMPUTER DATABASE QUERY THAT FETCHES N ROWS Public/Granted day:2008-01-24
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