Optimizing Database Queries
    31.
    发明申请
    Optimizing Database Queries 失效
    优化数据库查询

    公开(公告)号:US20090281992A1

    公开(公告)日:2009-11-12

    申请号:US12117037

    申请日:2008-05-08

    IPC分类号: G06F7/06 G06F1/32 G06F17/30

    摘要: Embodiments of the invention provide techniques for optimizing database queries for energy efficiency. In general, a query optimizer is configured to compare energy requirements of query plans, and to select a query plan requiring minimal energy to execute. In one embodiment, the query optimizer may also compare time performance of the query plans, and may select a query plan by matching to a user preference for a relative priority between energy requirements and time performance.

    摘要翻译: 本发明的实施例提供了用于优化能量效率的数据库查询的技术。 通常,查询优化器被配置为比较查询计划的能量需求,并选择需要最少能量执行的查询计划。 在一个实施例中,查询优化器还可以比较查询计划的时间性能,并且可以通过与能量需求和时间性能之间的相对优先级的用户偏好匹配来选择查询计划。

    METHODS, SYSTEMS, AND COMPUTER PROGRAM PRODUCTS FOR USER-DRIVEN TARGETED QUERY RE-OPTIMIZATIONS USING DELTA VALUES
    32.
    发明申请
    METHODS, SYSTEMS, AND COMPUTER PROGRAM PRODUCTS FOR USER-DRIVEN TARGETED QUERY RE-OPTIMIZATIONS USING DELTA VALUES 审中-公开
    方法,系统和计算机程序产品,用于使用DELTA VALUES的用户驱动的目标查询重新优化

    公开(公告)号:US20090077013A1

    公开(公告)日:2009-03-19

    申请号:US11857814

    申请日:2007-09-19

    IPC分类号: G06F7/00

    CPC分类号: G06F16/24534 G06F16/217

    摘要: A method, system, and computer program product for user-driven targeted query re-optimizations using delta values are provided. The method includes displaying a query tree for a query via a graphical user interface (GUI), where the query tree includes a plurality of interconnected nodes in a tree structure, and outputting a delta value as a difference between an estimated and an actual performance metric of query execution. The method also includes receiving a request to provide alternative execution plans for a subtree of a selected node of the query tree, and displaying at least one alternative execution plan description for the subtree of the selected node. The method further includes receiving a re-optimization request for a user selected alternative execution plan description, and displaying a re-optimized query tree resulting from the re-optimization request.

    摘要翻译: 提供了一种使用增量值进行用户驱动的目标查询重新优化的方法,系统和计算机程序产品。 该方法包括通过图形用户界面(GUI)显示用于查询的查询树,其中查询树包括树形结构中的多个互连节点,并且输出增量值作为估计和实际性能度量之间的差值 的查询执行。 该方法还包括接收对查询树的所选节点的子树提供替代执行计划的请求,以及显示所选节点的子树的至少一个备选执行计划描述。 该方法还包括接收对用户选择的替代执行计划描述的重新优化请求,以及显示由重新优化请求产生的重新优化的查询树。