ADAPTIVE QUERY EXECUTION PLAN ENHANCEMENT
    1.
    发明申请
    ADAPTIVE QUERY EXECUTION PLAN ENHANCEMENT 失效
    自适应查询执行计划增强

    公开(公告)号:US20130262435A1

    公开(公告)日:2013-10-03

    申请号:US13431981

    申请日:2012-03-28

    IPC分类号: G06F17/30

    摘要: An adaptive query execution plan enhancement is provided by: selecting a sample of literal sets from an execution history of a query statement; determining a plurality of access paths by applying each literal set in the sample to the query statement; for each given access path of the plurality of access paths, determining a total execution cost by applying each literal set in the sample to the given access path; and selecting a preferred access path from the plurality of access paths based on the total execution costs for each given access path. A plurality of preferred access paths for a plurality of query statements in an application workload is collected and may be presented as a query execution plan enhancement recommendation to users.

    摘要翻译: 通过以下方式提供自适应查询执行计划增强:从查询语句的执行历史中选择文字集合的样本; 通过将样本中的每个文字集合应用于查询语句来确定多个访问路径; 对于所述多个访问路径中的每个给定访问路径,通过将所述样本中的每个文字集合应用于所述给定访问路径来确定总执行成本; 以及基于每个给定访问路径的总执行成本从多个访问路径中选择优选的访问路径。 收集用于应用工作负载中的多个查询语句的多个优选访问路径,并且可以将其作为查询执行计划增强推荐呈现给用户。

    Adaptive query execution plan enhancement
    2.
    发明授权
    Adaptive query execution plan enhancement 失效
    自适应查询执行计划增强

    公开(公告)号:US08645356B2

    公开(公告)日:2014-02-04

    申请号:US13431981

    申请日:2012-03-28

    IPC分类号: G06F7/00 G06F17/30

    摘要: An adaptive query execution plan enhancement is provided by: selecting a sample of literal sets from an execution history of a query statement; determining a plurality of access paths by applying each literal set in the sample to the query statement; for each given access path of the plurality of access paths, determining a total execution cost by applying each literal set in the sample to the given access path; and selecting a preferred access path from the plurality of access paths based on the total execution costs for each given access path. A plurality of preferred access paths for a plurality of query statements in an application workload is collected and may be presented as a query execution plan enhancement recommendation to users.

    摘要翻译: 通过以下方式提供自适应查询执行计划增强:从查询语句的执行历史中选择文字集合的样本; 通过将样本中的每个文字集合应用于查询语句来确定多个访问路径; 对于所述多个访问路径中的每个给定访问路径,通过将所述样本中的每个文字集合应用于所述给定访问路径来确定总执行成本; 以及基于每个给定访问路径的总执行成本从多个访问路径中选择优选的访问路径。 收集用于应用工作负载中的多个查询语句的多个优选访问路径,并且可以将其作为查询执行计划增强推荐呈现给用户。

    TOOL AND A METHOD FOR CUSTOMIZING HINT
    3.
    发明申请
    TOOL AND A METHOD FOR CUSTOMIZING HINT 审中-公开
    工具和定制提示的方法

    公开(公告)号:US20080091647A1

    公开(公告)日:2008-04-17

    申请号:US11766759

    申请日:2007-06-21

    IPC分类号: G06F7/00

    CPC分类号: G06F16/2453

    摘要: The application relates to a tool and a method for customizing hint. According to the invention, provided is at least one hint service adapter configured to collect relevant information of different database platforms, validate customized hint on real database platforms and provide feedback, and deploy the customized hint on database platform. Also provided is hint defining means configured to customize hint independently of database platforms, and providing customized hint to the at least one hint service adapter.

    摘要翻译: 该应用涉及一种用于自定义提示的工具和方法。 根据本发明,提供了至少一个提示服务适配器,其被配置为收集不同数据库平台的相关信息,验证真实数据库平台上的定制提示并提供反馈,并在数据库平台上部署定制提示。 还提供了提示定义装置,被配置为独立于数据库平台定制提示,并且向至少一个提示服务适配器提供定制提示。