发明申请
US20090083212A1 SYSTEM AND METHOD FOR EXECUTNG MULTIPLE CONCURRENT INDEX-DRIVEN TABLE ACCESS OPERATIONS
失效
用于多项式多目标指数驱动表访问操作的系统和方法
- 专利标题: SYSTEM AND METHOD FOR EXECUTNG MULTIPLE CONCURRENT INDEX-DRIVEN TABLE ACCESS OPERATIONS
- 专利标题(中): 用于多项式多目标指数驱动表访问操作的系统和方法
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申请号: US11859405申请日: 2007-09-21
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公开(公告)号: US20090083212A1公开(公告)日: 2009-03-26
- 发明人: Bishwaranjan Bhattacharjee , Christian A. Lang , Timothy R. Malkemus
- 申请人: Bishwaranjan Bhattacharjee , Christian A. Lang , Timothy R. Malkemus
- 申请人地址: US NY ARMONK
- 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
- 主分类号: G06F17/30
- IPC分类号: G06F17/30
摘要:
An index scan processor and method to perform concurrent scans of stored indexed data. An indexed data scanner performs a first scan of stored data by sequentially scanning through an index data structure and maintains, over a duration of the first scan, a first scan current scan location within the index data structure that indicates a currently accessed record within the stored data structure for the first scan. A scan manager accepts a request for a second scan of the stored data, determines, during the performing the first scan, a starting index scan location within the index data structure for the second scan that is sufficiently near the first scan current index scan location to cause records indicated by the starting location index to be stored within a buffer due to the performing the first scan, and starts the second scan at the starting location and proceeding to the second end key.