发明授权
US08566300B2 Mechanism for efficient maintenance of XML index structures in a database system
有权
在数据库系统中有效维护XML索引结构的机制
- 专利标题: Mechanism for efficient maintenance of XML index structures in a database system
- 专利标题(中): 在数据库系统中有效维护XML索引结构的机制
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申请号: US11286873申请日: 2005-11-22
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公开(公告)号: US08566300B2公开(公告)日: 2013-10-22
- 发明人: Ravi Murthy , Sivasankaran Chandrasekar , Eric Sedlar , Nipun Agarwal
- 申请人: Ravi Murthy , Sivasankaran Chandrasekar , Eric Sedlar , Nipun Agarwal
- 申请人地址: US CA Redwood Shores
- 专利权人: Oracle International Corporation
- 当前专利权人: Oracle International Corporation
- 当前专利权人地址: US CA Redwood Shores
- 代理机构: Hickman Palermo Truong Becker Bingham Wong LLP
- 代理商 Daniel D. Ledesma
- 主分类号: G06F17/30
- IPC分类号: G06F17/30
摘要:
A method and apparatus for efficiently maintaining XML index structures in a database system is provided. Instead of immediately synchronizing the XML index structures for every change submitted to the database, the changes are stored in a PENDING table. The XML index structures are periodically synchronized, based on certain criteria or at a user's discretion. Between synchronizations, the XML index structures may be in stale mode or current mode. If in stale mode, a request to access indexed information will use the XML index structures to find the desired indexed information without checking the PENDING table. If in current mode, a request to access indexed information will search the XML index structures and also check the PENDING table to determine 1) whether the indexed information has been updated or deleted, and 2) whether information relevant to the request has been inserted or updated.
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