发明授权
- 专利标题： Accelerating value-based lookup of XML document in XQuery
- 专利标题（中）： 在XQuery中加速基于价值的XML文档查找
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申请号： US11827801申请日： 2007-07-13
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公开(公告)号： US07836098B2公开(公告)日： 2010-11-16
- 发明人: Thomas Baby , Sivasankaran Chandrasekar , Asha Tarachandani , Nipun Agarwal
- 申请人： Thomas Baby , Sivasankaran Chandrasekar , Asha Tarachandani , 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 LLP
- 主分类号： G06F7/00
- IPC分类号： G06F7/00 ; G06F17/30
摘要：
A method and apparatus for accelerating value-based lookups of XML documents in XQuery is provided. XML indices can help to optimize SQL queries of XML documents stored in object-relational databases. Certain SQL/XML functions such as XMLTABLE( ) use XQuery expressions to query XML documents. Previously, such queries could not use the XML index because the PATH table of the XML index was not defined for XQuery semantics. Techniques described herein extend the XML index for use with queries that require evaluation of XQuery expressions. Consequently, techniques described herein accelerate value-based lookups of XML documents in XQuery by introducing the possibility of an index-assisted evaluation of XQuery expressions.