发明授权
- 专利标题: Managing overflow access records in a database
- 专利标题(中): 管理数据库中的溢出访问记录
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申请号: US13410548申请日: 2012-03-02
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公开(公告)号: US09043294B2公开(公告)日: 2015-05-26
- 发明人: Sebastian Nelke , Martin Oberhofer , Yannick Saillet , Jens Seifert , Knut Stolze
- 申请人: Sebastian Nelke , Martin Oberhofer , Yannick Saillet , Jens Seifert , Knut Stolze
- 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
- 代理机构: Cantor Colburn LLP
- 优先权: EP11158976 20110321
- 主分类号: G06F17/30
- IPC分类号: G06F17/30
摘要:
Overflow access records (OARs) are managed in a database system. An OAR is created in response to receiving an update command for a data record and to the updated data record generated by the update command not fitting onto the page in the table where the data record was stored. The OAR that is created includes an index counter that indicates a number of indexes associated with the table. When an OAR is accessed in response to a query command, an identifier of the accessed OAR is replaced in the index by an identifier of a data record pointed to by the OAR, and the index counter in the accessed OAR is changed by a predefined amount. When the index counter reaches a predefined value, the accessed OAR is removed from the table.
公开/授权文献
- US20120246132A1 MANAGING OVERFLOW ACCESS RECORDS IN A DATABASE 公开/授权日:2012-09-27
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