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    • 13. 发明授权
    • Query plan analysis of alternative plans using robustness mapping
    • 使用鲁棒性映射的替代计划的查询计划分析
    • US09128984B2
    • 2015-09-08
    • US12364107
    • 2009-02-02
    • Janet L. WienerGoetz GraefeHarumi Kuno
    • Janet L. WienerGoetz GraefeHarumi Kuno
    • G06F7/00G06F17/30
    • G06F17/30463G06F17/30474
    • Computer-implemented and associated operating methods evaluate robustness of a query plan by measuring performance with regard to a range of runtime conditions and producing a map of relative performance of the given query plan when compared with alternative plans for a range of conditions. The computer-implemented system comprises logic that evaluates the selected query plan in comparison to multiple alternative query plans in a predetermined range of runtime conditions that include data characteristics. The logic produces a set of performance measurements and analyzes the measured performance to map performance of the selected query plan in comparison to performance of one or more alternative query plans.
    • 计算机实现和相关联的操作方法通过针对一系列运行时条件测量性能,并且与一系列条件的替代计划相比较,产生给定查询计划的相对性能的映射来评估查询计划的鲁棒性。 计算机实现的系统包括在包括数据特性的运行时间条件的预定范围内与多个备选查询计划相比较来评估所选择的查询计划的逻辑。 与一个或多个替代查询计划的性能相比,该逻辑产生一组性能测量并分析测量的性能以映射所选查询计划的性能。