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    • 5. 发明授权
    • Performance data for query optimization of database partitions
    • 数据库分区查询优化的性能数据
    • US07734615B2
    • 2010-06-08
    • US11138832
    • 2005-05-26
    • Mark John AndersonRobert Joseph BestgenShantan KethireddyJeffrey Wayne Tenner
    • Mark John AndersonRobert Joseph BestgenShantan KethireddyJeffrey Wayne Tenner
    • G06F17/30
    • G06F17/30312
    • A method, apparatus, system, and signal-bearing medium that, in an embodiment, determine performance data for query optimization of a query directed to a database table having multiple partitions. The performance data for the query optimization is presented in a user interface, and an option is provided in the user interface to create a non-spanning index for any of the partitions mentioned in the performance data. In various embodiments, determining the performance data may include: determining the partitions that were unexpanded by the query optimization, determining the partitions that had a runtime estimate that was different from an actual query runtime by a threshold, determining whether any of the partitions had expansion forced by a client request, determining whether the query performed partition elimination, determining whether any of the partitions has an associated index that is unused by the query and that also has a key that is not present in all of the partitions, and determining a constraint for partition elimination.
    • 一种方法,装置,系统和信号承载介质,其在一个实施例中确定用于针对具有多个分区的数据库表的查询的查询优化的性能数据。 查询优化的性能数据在用户界面中呈现,并且在用户界面中提供了一个选项,以便为演奏数据中提到的任何分区创建非跨度索引。 在各种实施例中,确定性能数据可以包括:确定由查询优化未展开的分区,将具有与实际查询运行时间不同的运行时间估计的分区确定为阈值,确定是否有任何分区具有扩展 通过客户端请求强制,确定查询是否执行分区消除,确定任何分区是否具有由查询未使用的关联索引,并且还具有不存在于所有分区中的密钥,以及确定约束 用于分区消除。
    • 7. 发明授权
    • Aggregating database queries
    • 聚合数据库查询
    • US07958158B2
    • 2011-06-07
    • US12142182
    • 2008-06-19
    • Robert Joseph BestgenWei HuShantan KethireddyAndrew Peter PasseUlrich Thiemann
    • Robert Joseph BestgenWei HuShantan KethireddyAndrew Peter PasseUlrich Thiemann
    • G06F7/00
    • G06F17/30442Y02D10/45
    • Embodiments of the invention provide techniques for aggregating database queries for energy efficiency. In one embodiment, queries received by a DBMS are aggregated and staged according to hard-disk drives required for query execution. Each group of queries accessing a given drive may be dispatched for execution together. Further, the queries received by a DBMS may be matched to patterns of previously received queries. The matching patterns may be used to predict other queries which are likely to be received by the DBMS. The received queries may be staged to be dispatched with the predicted queries. By aggregating queries to be executed, access to each hard-disk drive may be optimized, thus reducing the overall energy consumption required for executing the queries.
    • 本发明的实施例提供了用于聚合用于能量效率的数据库查询的技术。 在一个实施例中,由DBMS接收的查询根据查询执行所需的硬盘驱动器进行聚合和分段。 可以一起调度访问给定驱动器的每组查询。 此外,由DBMS接收的查询可以与之前接收到的查询的模式相匹配。 匹配模式可用于预测DBMS可能接收到的其他查询。 所接收的查询可以被分段以用预测的查询进行调度。 通过聚合要执行的查询,可以优化对每个硬盘驱动器的访问,从而降低执行查询所需的总体能量消耗。