发明申请
- 专利标题: APPARATUS AND METHOD FOR OPTIMIZING A COMPUTER DATABASE QUERY THAT FETCHES N ROWS
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申请号: US11864911申请日: 2007-09-29
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公开(公告)号: US20080021868A1公开(公告)日: 2008-01-24
- 发明人: Brian Muras , Robert Nelson , John Santosuosso
- 申请人: Brian Muras , Robert Nelson , John Santosuosso
- 申请人地址: US NY Armonk 10504
- 专利权人: INTERNATIONAL BUSINESS MACHINES CORPORATION
- 当前专利权人: INTERNATIONAL BUSINESS MACHINES CORPORATION
- 当前专利权人地址: US NY Armonk 10504
- 主分类号: G06F7/00
- IPC分类号: G06F7/00
摘要:
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.
公开/授权文献
- US07734620B2 Optimizing a database query that fetches N rows 公开/授权日:2010-06-08
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