Techniques for efficient queries on a file system-

专利名称：Techniques for efficient queries on a file

system-like repository

发明人：Asha Tarachandani,Bhushan Khaladkar,Sam

Idicula,Adiel Yoaz,Nipun Agarwal

申请号：US12618356申请日：20091113公开号：US09146961B2公开日：20150929

专利附图：

摘要：Techniques are provided to achieve performance improvements for path-basedaccess to hierarchical data and for utilizing an extensible indexing framework. Extensible

operators may be optimized by evaluating the operators using functions native to thedatabase system instead of using functions defined through an extensible indexingmechanism. Furthermore, the database system may resolve a resource path of a querywhen the query is compiled, and may store the mapping of the resource path to one ormore resources in a cursor for the query execution plan to avoid resolving the resourcepath each time the cursor is used to run the query. The cursor may be made dependenton the one or more resources to which the resource path refers at compile time. Thistakes advantage of the observation that the mapping of the resource path to particularresources rarely changes between evaluations of a particular query.

申请人：Asha Tarachandani,Bhushan Khaladkar,Sam Idicula,Adiel Yoaz,Nipun Agarwal

地址：Newark CA US,Mountain View CA US,Santa Clara CA US,Tel Aviv IL,Santa Clara CAUS

国籍：US,US,US,IL,US

代理机构：Hickman Palermo Becker Bingham LLP

代理人：Ellen Y. Wei

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