发明申请
- 专利标题： Mechanism for improving performance on XML over XML data using path subsetting
- 专利标题（中）： 使用路径子集提高XML数据的性能的机制
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申请号： US11401613申请日： 2006-04-10
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公开(公告)号： US20060184551A1公开(公告)日： 2006-08-17
- 发明人: Asha Tarachandani , Sivasankaran Chandrasekar , Nipun Agarwal , Eric Sedlar , Ravi Murthy , Anh-Tuan Tran
- 申请人： Asha Tarachandani , Sivasankaran Chandrasekar , Nipun Agarwal , Eric Sedlar , Ravi Murthy , Anh-Tuan Tran
- 主分类号： G06F17/00
- IPC分类号： G06F17/00 ; G06F7/00
摘要：
Techniques are provided for indexing XML documents using path subsetting. According to one embodiment, a PATH table created for storing one row for each indexed node of the XML documents using user-defined criteria. The user-defined criteria are used to determine which nodes of XML documents to included in The PATH TABLE. The PATH table row for a node includes (1) information for locating the XML document that contains the node, (2) information that identifies the path of the node, and (3) information that identifies the position of the node within the hierarchical structure of the XML document that contains the node. Use of the user defined criteria is transparent to any query improves DML indexes overhead costs.