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    • 4. 发明授权
    • Multiple result sets generated from single pass through a dataspace
    • 从单次通过数据空间生成的多个结果集
    • US09411861B2
    • 2016-08-09
    • US11962980
    • 2007-12-21
    • Robert Joseph BestgenDavid Glenn CarlsonRobert Victor DownerShantan Kethireddy
    • Robert Joseph BestgenDavid Glenn CarlsonRobert Victor DownerShantan Kethireddy
    • G06F17/30
    • G06F17/30545
    • A method, apparatus and program product are provided for performing a query of a database. A database query is received, which includes first and second operations respectively configured to generate first and second disjoint results sets from a dataspace. The database query is analyzed to identify a set of attributes from the dataspace that are used by at least one of the first and second operations in the database query. During execution of the database query, a plurality of records from the dataspace is iteratively processed in a single pass, including, for each of the plurality of records, processing such record by retrieving the plurality of attributes for such record from the dataspace and performing each of the first and second operations on the record using the retrieved attributes for such record to build the first and second disjoint results sets.
    • 提供了一种用于执行数据库查询的方法,装置和程序产品。 接收到数据库查询,其包括分别被配置为从数据空间生成第一和第二不相交结果集的第一和第二操作。 分析数据库查询以从数据库空间识别由数据库查询中的第一和第二操作中的至少一个使用的一组属性。 在执行数据库查询期间,来自数据空间的多个记录在单次传递中被迭代地处理,包括对于多个记录中的每一个记录,通过从数据空间检索这样的记录的多个属性并且执行每个记录 使用检索到的这种记录的属性来构建第一和第二不相交结果集的记录上的第一和第二操作。
    • 5. 发明申请
    • Multiple Result Sets Generated from Single Pass Through a Dataspace
    • 通过数据空间从单次生成的多个结果集
    • US20090164412A1
    • 2009-06-25
    • US11962980
    • 2007-12-21
    • Robert Joseph BestgenDavid Glenn CarlsonRobert Victor DownerShantan Kethireddy
    • Robert Joseph BestgenDavid Glenn CarlsonRobert Victor DownerShantan Kethireddy
    • G06F17/30
    • G06F17/30545
    • A method, apparatus and program product are provided for performing a query of a database. A database query is received, which includes first and second operations respectively configured to generate first and second disjoint results sets from a dataspace. The database query is analyzed to identify a set of attributes from the dataspace that are used by at least one of the first and second operations in the database query. During execution of the database query, a plurality of records from the dataspace is iteratively processed in a single pass, including, for each of the plurality of records, processing such record by retrieving the plurality of attributes for such record from the dataspace and performing each of the first and second operations on the record using the retrieved attributes for such record to build the first and second disjoint results sets.
    • 提供了一种用于执行数据库查询的方法,装置和程序产品。 接收到数据库查询,其包括分别被配置为从数据空间生成第一和第二不相交结果集的第一和第二操作。 分析数据库查询以从数据库空间识别由数据库查询中的第一和第二操作中的至少一个使用的一组属性。 在执行数据库查询期间,数据空间中的多个记录在单次传递中被迭代处理,包括对于多个记录中的每个记录,通过从数据空间检索这样的记录的多个属性并执行每个记录 使用检索到的这种记录的属性来构建第一和第二不相交结果集的记录上的第一和第二操作。