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热词
    • 18. 发明授权
    • Dynamic and selective data source binding through a metawrapper
    • 动态和选择性的数据源绑定通过metawrapper
    • US07315872B2
    • 2008-01-01
    • US10931002
    • 2004-08-31
    • Inderpal S. NarangVijayshankar RamanPeter M. Schwarz
    • Inderpal S. NarangVijayshankar RamanPeter M. Schwarz
    • G06F17/00
    • G06F17/30575Y10S707/99933Y10S707/99955
    • A system, method, and program storage device implementing the method, for integrating data in a database management system, wherein the method comprises grouping data sources and replicas of the data sources that provide analogous data into a common logical domain; writing application queries against the common logical domain; selecting a correct set of replicas of the data sources and a query-execution strategy for combining a content of the correct set of replicas of the data sources in order to answer the application queries according to query-cost-based optimization; selecting a correct set of data sources according to run-time constraints; shielding the application queries from changes to the data sources by dynamically binding the application queries against the correct sets of data sources and replicas of the data sources; and processing the application queries by generating an optimum query result based on the steps of grouping and shielding.
    • 实现该方法的系统,方法和程序存储设备,用于将数据集成在数据库管理系统中,其中该方法包括将提供类似数据的数据源的数据源和副本分组到公共逻辑域中; 针对公共逻辑域编写应用程序查询; 选择正确的数据源副本和用于组合数据源的正确的副本集合的内容的查询执行策略,以便根据基于查询成本的优化来应答应用查询; 根据运行时限制选择正确的数据源集合; 通过将应用程序查询与数据源的正确数据源和副本集合动态绑定来屏蔽应用程序查询对数据源的更改; 并通过基于分组和屏蔽的步骤产生最佳查询结果来处理应用查询。