会员体验
专利管家(专利管理)
工作空间(专利管理)
风险监控(情报监控)
数据分析(专利分析)
侵权分析(诉讼无效)
联系我们
交流群
官方交流:
QQ群: 891211   
微信请扫码    >>>
现在联系顾问~
热词
    • 2. 发明授权
    • Obtaining a plan for executing a query in a relational database
    • 获取在关系数据库中执行查询的计划
    • US07937385B2
    • 2011-05-03
    • US12114913
    • 2008-05-05
    • Robert J. BestgenWei HuShantan KethireddyAndrew P. PasseUlrich Thiemann
    • Robert J. BestgenWei HuShantan KethireddyAndrew P. PasseUlrich Thiemann
    • G06F17/30
    • G06F17/3048G06F17/30463
    • A plan for executing a query in a relational database is obtained. A query for accessing data in the relational database is received. The query specifies N tables in the relational database from which data is to be retrieved. A determination is made whether a syntax of the query matches a syntax of a plan in a plan cache for executing the query. Matches are identified between generic table formats of the N tables specified in the query to generic table formats of N tables specified in the plan responsive to the syntax of the query matching the syntax of a plan in the plan cache for executing the query. The plan for executing the query is obtained based on whether the syntax of the query matches the syntax of the plan and based on identified matches between the generic table formats of the N tables specified in the query to the generic table formats of the N tables specified in the plan.
    • 获得在关系数据库中执行查询的计划。 接收到关系数据库中访问数据的查询。 该查询指定要从中检索数据的关系数据库中的N个表。 确定查询的语法是否符合用于执行查询的计划高速缓存中的计划的语法。 在查询中指定的N个表的通用表格式之间的匹配在计划中指定的N个表的通用表格式中被标识,响应于查询的语法,该查询的语法与计划缓存中用于执行查询的计划的语法相匹配。 执行查询的计划是基于查询的语法是否符合计划的语法,并且基于查询中指定的N个表的通用表格格式与指定的N个表的通用表格式之间的所确定的匹配来获得 在计划中。
    • 6. 发明授权
    • Grouping predicted database queries
    • 分组预测数据库查询
    • US08015202B2
    • 2011-09-06
    • US12142206
    • 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接收到的查询可以匹配先前接收到的查询的模式。 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。
    • 10. 发明申请
    • Maintained Symbol Table Only Index
    • 维持符号表仅索引
    • US20090182720A1
    • 2009-07-16
    • US12014562
    • 2008-01-15
    • Michael W. CainMichael S. FaunceWei HuShantan KethireddyAndrew Peter PasseUlrich Thiemann
    • Michael W. CainMichael S. FaunceWei HuShantan KethireddyAndrew Peter PasseUlrich Thiemann
    • G06F17/30
    • G06F17/30336G06F17/30469
    • A method, apparatus and program product is provided for optimizing a database query. A query syntax, system generated predicates, and requisite statistics of the database query are analyzed to determine if a predicate structure is a good candidate for a symbol table only data structure. The predicate structure is analyzed to determine if the predicate structure is already encompassed by an encoded vector index. The symbol table only data structure is generated for at least one column in a database table without generating a corresponding vector data structure from an encoded vector index if the predicate structure is a good candidate and not encompassed by an encoded vector index. The symbol table only data structure is maintained by detecting a change in data associated with the symbol table only data structure and updating the symbol table only data structure to reflect the change in the data.
    • 提供了一种用于优化数据库查询的方法,装置和程序产品。 分析查询语法,系统生成的谓词和数据库查询的必要统计信息,以确定谓词结构是否仅是符号表格数据结构的良好候选。 分析谓词结构以确定谓词结构是否已被编码的向量索引包围。 如果谓词结构是一个很好的候选者并且不被编码的向量索引所包含,那么为数据库表中的至少一列生成符号表数据结构,而不从编码向量索引生成相应的向量数据结构。 仅通过检测与符号表仅数据结构相关联的数据的变化来维护仅符号表数据结构,并且仅更新符号表仅数据结构以反映数据的变化。