Verifying correctness of a database system via extended access paths
    1.
    发明授权
    Verifying correctness of a database system via extended access paths 有权
    通过扩展访问路径验证数据库系统的正确性

    公开(公告)号:US09195730B2

    公开(公告)日:2015-11-24

    申请号:US13252447

    申请日:2011-10-04

    IPC分类号: G06F7/00 G06F17/30

    CPC分类号: G06F17/30595

    摘要: The invention provides for verifying correctness of a database system. A SQL instruction is received and access paths of the received SQL instruction are extended. The SQL instruction is executed by using the extended access paths, and the correctness of the database system is verified according to results of executing the SQL instruction. With the method and system of the invention, the object of verifying correctness of a database system by automatically extending access paths of SQL statement may be achieved, and the object of verifying correctness of a database system scientifically, effectively and purposefully based on ratio of error or defect present in database itself due to various data manipulation approaches (different values of access path elements) may also be achieved.

    摘要翻译: 本发明提供了验证数据库系统的正确性。 接收到SQL指令,扩展接收的SQL指令的访问路径。 通过使用扩展访问路径执行SQL指令,并根据执行SQL指令的结果验证数据库系统的正确性。 利用本发明的方法和系统,可以实现通过自动扩展SQL语句的访问路径来验证数据库系统的正确性的目的,并且基于错误比率来科学,有效和有目的地验证数据库系统的正确性的目的 或者由于各种数据操作方法(不同的访问路径元素值)而存在于数据库本身中的缺陷也可以实现。

    Method of and apparatus for organizing data records in a relational database
    2.
    发明授权
    Method of and apparatus for organizing data records in a relational database 有权
    在关系数据库中组织数据记录的方法和装置

    公开(公告)号:US08972403B2

    公开(公告)日:2015-03-03

    申请号:US13365394

    申请日:2012-02-03

    IPC分类号: G06F17/30 G06F7/00

    CPC分类号: G06F17/30312

    摘要: Embodiments of the invention relate to organizing data records in a relational database. An aspect of the invention includes creating index items for a plurality of data records. Each index item includes a counter and the creating results in a plurality of counters. The numerical values of counters in corresponding index items are updated for data records in the plurality of data records that are subjected to random access. The plurality of data records are reorganized based upon the numerical values of the plurality of counters.

    摘要翻译: 本发明的实施例涉及在关系数据库中组织数据记录。 本发明的一个方面包括创建多个数据记录的索引项。 每个索引项目包括计数器,并且在多个计数器中创建结果。 针对经过随机存取的多个数据记录中的数据记录,对相应索引项中的计数器的数值进行更新。 基于多个计数器的数值重新组织多个数据记录。

    METHOD OF AND APPARATUS FOR ORGANIZING DATA RECORDS IN A RELATIONAL DATABASE
    3.
    发明申请
    METHOD OF AND APPARATUS FOR ORGANIZING DATA RECORDS IN A RELATIONAL DATABASE 有权
    在相关数据库中组织数据记录的方法和装置

    公开(公告)号:US20120221577A1

    公开(公告)日:2012-08-30

    申请号:US13365394

    申请日:2012-02-03

    IPC分类号: G06F17/30

    CPC分类号: G06F17/30312

    摘要: Embodiments of the invention relate to organizing data records in a relational database. An aspect of the invention includes creating index items for a plurality of data records. Each index item includes a counter and the creating results in a plurality of counters. The numerical values of counters in corresponding index items are updated for data records in the plurality of data records that are subjected to random access. The plurality of data records are reorganized based upon the numerical values of the plurality of counters.

    摘要翻译: 本发明的实施例涉及在关系数据库中组织数据记录。 本发明的一个方面包括创建多个数据记录的索引项。 每个索引项目包括计数器,并且在多个计数器中创建结果。 针对经过随机存取的多个数据记录中的数据记录,对相应索引项中的计数器的数值进行更新。 基于多个计数器的数值重新组织多个数据记录。

    DATABASE LARGE OBJECT REORGANIZATION
    4.
    发明申请
    DATABASE LARGE OBJECT REORGANIZATION 有权
    数据库大对象重组

    公开(公告)号:US20130117332A1

    公开(公告)日:2013-05-09

    申请号:US13463870

    申请日:2012-05-04

    IPC分类号: G06F17/30

    CPC分类号: G06F17/30292 G06F17/30318

    摘要: Embodiments of the invention relate to database large object (LOB) reorganization. An aspect of the invention includes calculating an activity of an inline LOB. The length of an inline LOB is redefined according to the activity of the inline LOB. LOB reorganization is performed based on the redefined length of the inline LOB.

    摘要翻译: 本发明的实施例涉及数据库大对象(LOB)重组。 本发明的一个方面包括计算在线LOB的活动。 根据内联LOB的活动重新定义内联LOB的长度。 基于内联LOB的重新定义的长度执行LOB重组。

    DYNAMIC MERGING OF EXECUTABLE STRUCTURES IN A DATABASE SYSTEM
    5.
    发明申请
    DYNAMIC MERGING OF EXECUTABLE STRUCTURES IN A DATABASE SYSTEM 审中-公开
    数据库系统中可执行结构的动态合并

    公开(公告)号:US20120278305A1

    公开(公告)日:2012-11-01

    申请号:US13443941

    申请日:2012-04-11

    IPC分类号: G06F17/30

    CPC分类号: G06F16/2455 G06F16/24524

    摘要: Embodiments of the present invention relate to dynamically merging executable structures in a database system. In one embodiment, there is provided a method of dynamically merging executable structures in a database system that includes, in response to a query to the database system, extracting a stem and a branch of a query statement. The query statement includes query conditions, and the branch includes at least a subset of the query conditions. An executable structure of the stem is obtained from a cache of the database system, and an executable structure of the branch is generated. The executable structure of the stem and the executable structure of the branch are merged into a runtime executable structure.

    摘要翻译: 本发明的实施例涉及在数据库系统中动态合并可执行结构。 在一个实施例中,提供了一种在数据库系统中动态合并可执行结构的方法,该方法响应于对数据库系统的查询,提取查询语句的句柄和分支。 查询语句包括查询条件,分支包括查询条件的至少一个子集。 从数据库系统的高速缓存获得该主干的可执行结构,并生成该分支的可执行结构。 主干的可执行结构和分支的可执行结构被合并到运行时可执行结构中。

    Verifying Correctness of a Database System
    6.
    发明申请
    Verifying Correctness of a Database System 有权
    验证数据库系统的正确性

    公开(公告)号:US20120173498A1

    公开(公告)日:2012-07-05

    申请号:US13252447

    申请日:2011-10-04

    IPC分类号: G06F7/00

    CPC分类号: G06F17/30595

    摘要: The invention provides a method for verifying correctness of a database system, comprising: receiving SQL instruction; extending access paths of the received SQL instruction; executing the SQL instruction by using the extended access paths; and verifying correctness of the database system according to result of executing the SQL instruction. With the method and system of the invention, the object of verifying correctness of a database system by automatically extending access paths of SQL statement may be achieved, and the object of verifying correctness of a database system scientifically, effectively and purposefully based on ratio of error or defect present in database itself due to various data manipulation approaches (different values of access path elements) may also be achieved.

    摘要翻译: 本发明提供了一种验证数据库系统的正确性的方法,包括:接收SQL指令; 扩展接收的SQL指令的访问路径; 通过使用扩展访问路径执行SQL指令; 并根据执行SQL指令的结果验证数据库系统的正确性。 利用本发明的方法和系统,可以实现通过自动扩展SQL语句的访问路径来验证数据库系统的正确性的目的,并且基于错误比率来科学,有效和有目的地验证数据库系统的正确性的目的 或者由于各种数据操作方法(不同的访问路径元素值)而存在于数据库本身中的缺陷也可以实现。

    Database large object reorganization
    7.
    发明授权
    Database large object reorganization 有权
    数据库大对象重组

    公开(公告)号:US09158798B2

    公开(公告)日:2015-10-13

    申请号:US13463870

    申请日:2012-05-04

    IPC分类号: G06F17/30

    CPC分类号: G06F17/30292 G06F17/30318

    摘要: Embodiments of the invention relate to database large object (LOB) reorganization. An aspect of the invention includes calculating an activity of an inline LOB. The length of an inline LOB is redefined according to the activity of the inline LOB. LOB reorganization is performed based on the redefined length of the inline LOB.

    摘要翻译: 本发明的实施例涉及数据库大对象(LOB)重组。 本发明的一个方面包括计算在线LOB的活动。 根据内联LOB的活动重新定义内联LOB的长度。 基于内联LOB的重新定义的长度执行LOB重组。

    String light
    8.
    外观设计

    公开(公告)号:USD962498S1

    公开(公告)日:2022-08-30

    申请号:US29808136

    申请日:2021-09-17

    申请人: Xiang Zhou

    设计人: Xiang Zhou

    Method for improving the performance of digital coherent optical receiver using single ended photo-detection
    9.
    发明授权
    Method for improving the performance of digital coherent optical receiver using single ended photo-detection 有权
    使用单端光检测改善数字相干光接收机性能的方法

    公开(公告)号:US08655194B2

    公开(公告)日:2014-02-18

    申请号:US13566229

    申请日:2012-08-03

    申请人: Xiang Zhou

    发明人: Xiang Zhou

    IPC分类号: H04B10/06 H04B10/12

    摘要: A method and system for mitigating distortion in coherent single-ended photo-detection is disclosed. The methodology comprises: receiving an optical signal carried on an optical transmission medium and coherently detecting the received optical signal to produce a digitized signal; estimating a time-dependent random variable introducing distortion to the coherently detected signal; and subtracting the distortion from digitized signal to produce a distortion mitigated output signal.

    摘要翻译: 公开了一种减轻相干单端光检测失真的方法和系统。 该方法包括:接收在光传输介质上承载的光信号,并相干地检测接收到的光信号以产生数字化信号; 估计对相干检测信号引入失真的时间依赖随机变量; 并从数字化信号中减去失真以产生失真缓解输出信号。