- 专利标题: Querying markup language data sources using a relational query processor
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申请号: US12239308申请日: 2008-09-26
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公开(公告)号: US08001151B2公开(公告)日: 2011-08-16
- 发明人: Martin Breining , Vanja Josifovski , Peter M. Schwarz
- 申请人: Martin Breining , Vanja Josifovski , Peter M. Schwarz
- 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: Sughrue Mion, PLLC
- 主分类号: G06F17/30
- IPC分类号: G06F17/30
摘要:
An XML wrapper queries an XML document in an on-the-fly manner so that only parent nodes in the document that satisfy the query are extracted and then unnested. The parent nodes and associated descendent nodes are located using XPath expressions contained as options in data definition language (DDL) statements. The parent nodes satisfying the query and associated descendent nodes are extracted and stored outside of a database according to a relational schema. The wrapper facilitates applications that use convention SQL queries and views to operate on that information stored according to the relational schema. The wrapper also responds to query optimizer requests for costs associated with queries against external data sources associated with the wrapper.