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81.发明申请公开(公告)号：US20120066271A1
公开(公告)日：2012-03-15
申请号：US13301690
申请日：2011-11-21
IPC分类号： G06F7/00
CPC分类号： G06F17/30917 , G06F17/30451 , Y10S707/99945
摘要： A modular repository is described, where operational features may be implemented without the need to scan every resource included in the modular repository. A modular repository includes a dedicated set of database objects containing all information needed to access the resources in the repository. For example, the database objects of a modular repository may include those user identifier mappings and ACL mappings, etc., to which metadata in the modular repository refers. A database system may also include a mechanism through which a modular repository may be mounted under a subdirectory of a common directory in the database system. The resources of a modular repository that are mounted under the common directory may be accessed through the common directory. Further, a client may query the resources of any modular repository mounted under the common directory by making the federated repository, represented by the common directory, the context of the query.
摘要翻译： 描述了模块化存储库，其中可以实现操作特征，而不需要扫描模块化存储库中包括的每个资源。 模块化存储库包括一组专用的数据库对象，其中包含访问存储库中资源所需的所有信息。 例如，模块化存储库的数据库对象可以包括模块化存储库中的元数据引用的那些用户标识符映射和ACL映射等。 数据库系统还可以包括机构，模块化存储库可以通过该机制安装在数据库系统中的公用目录的子目录下。 安装在公共目录下的模块化存储库的资源可以通过公共目录访问。 此外，客户端可以通过使由共同目录表示的联合存储库，查询的上下文来查询安装在公用目录下的任何模块化存储库的资源。
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82.发明授权Mechanism for deferred rewrite of multiple XPath evaluations over binary XML 有权对二进制XML进行多个XPath评估的延迟重写的机制公开(公告)号：US08073843B2
公开(公告)日：2011-12-06
申请号：US12181725
申请日：2008-07-29
IPC分类号： G06F7/00
CPC分类号： G06F17/30935 , G06F17/30911
摘要： A mechanism is provided for improving the performance of particular database queries operating on a view comprising binary-encoded XML. A determination is made about whether a XML index is available to improve the computation of XPath data before deriving an optimized execution plan for a particular query. When a XML index is not available to help expedite the computation of binary-encoded XML, then deferring the computation of the XPath data until after the view merge stage avoids unnecessary computation of XPaths that are part of the view but not needed for the particular query.
摘要翻译： 提供了一种机制，用于提高在包含二进制编码XML的视图上操作的特定数据库查询的性能。 在为特定查询导出优化的执行计划之前，确定XML索引是否可用于改进XPath数据的计算。 当XML索引不可用以帮助加速二进制编码的XML的计算时，则推迟XPath数据的计算，直到视图合并阶段之后，避免不必要的计算XPath作为视图的一部分，但不需要特定的查询 。
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83.发明申请公开(公告)号：US20110066654A1
公开(公告)日：2011-03-17
申请号：US12560242
申请日：2009-09-15
IPC分类号： G06F7/00
CPC分类号： G06F17/30917 , G06F17/30451 , Y10S707/99945
摘要： A modular repository is described, where operational features may be implemented without the need to scan every resource included in the modular repository. A modular repository includes a dedicated set of database objects containing all information needed to access the resources in the repository. For example, the database objects of a modular repository may include those user identifier mappings and ACL mappings, etc., to which metadata in the modular repository refers. A database system may also include a mechanism through which a modular repository may be mounted under a subdirectory of a common directory in the database system. The resources of a modular repository that are mounted under the common directory may be accessed through the common directory. Further, a client may query the resources of any modular repository mounted under the common directory by making the federated repository, represented by the common directory, the context of the query.
摘要翻译： 描述了模块化存储库，其中可以实现操作特征，而不需要扫描模块化存储库中包括的每个资源。 模块化存储库包括一组专用的数据库对象，其中包含访问存储库中资源所需的所有信息。 例如，模块化存储库的数据库对象可以包括模块化存储库中的元数据引用的那些用户标识符映射和ACL映射等。 数据库系统还可以包括机构，模块化存储库可以通过该机制安装在数据库系统中的公用目录的子目录下。 安装在公共目录下的模块化存储库的资源可以通过公共目录访问。 此外，客户端可以通过使由共同目录表示的联合存储库，查询的上下文来查询安装在公用目录下的任何模块化存储库的资源。
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公开(公告)号：US20090125480A1
公开(公告)日：2009-05-14
申请号：US11937357
申请日：2007-11-08
IPC分类号： G06F17/30
CPC分类号： G06F17/30932 , G06F17/30935
摘要： A query is rewritten to combine streaming evaluation and XML index evaluation. The query is rewritten to include a streaming operator (e.g. function) that, when executed, uses streaming evaluation. Further, the query is rewritten so that XML index evaluation of a path expression also produces location information that identifies the location of a node within an XML document. The streaming operator is able to exploit the location information to begin and end scanning rather than scanning the entire XML document.
摘要翻译： 重写查询以组合流评估和XML索引评估。 该查询被重写以包括流执行器（例如，功能），当被执行时，使用流评估。 此外，重写该查询，使得路径表达式的XML索引评估还产生标识XML文档中的节点的位置的位置信息。 流操作员能够利用位置信息开始和结束扫描，而不是扫描整个XML文档。
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公开(公告)号：US08090731B2
公开(公告)日：2012-01-03
申请号：US12180760
申请日：2008-07-28
申请人： Balasubramanyam Sthanikam , Sivasankaran Chandrasekar , Nipun Agarwal , Sam Idicula , Vijay Medi
发明人： Balasubramanyam Sthanikam , Sivasankaran Chandrasekar , Nipun Agarwal , Sam Idicula , Vijay Medi
IPC分类号： G06F17/30
CPC分类号： G06F17/30569 , G06F17/30908
摘要： Techniques are provided for ensuring lexical fidelity when an XML document is stored in a binary format. Operations, on the XML data, that would cause the loss of lexical fidelity between the original XML document and the binary-encoded version of the XML document are not performed. Such operations include the removal of unnecessary whitespace characters, certain data type conversions, CRLF normalization, the “collapsing” of two-tag empty elements into a single tag empty element, and the replacing of entity references or numeric character references with another value. An XML schema, to which the XML document conforms, may indicate that the XML document is to be stored in a lexical fidelity mode. Additionally, or alternatively, the database statement that (when executed) causes the XML document to be stored in a binary format may so indicate.
摘要翻译： 当XML文档以二进制格式存储时，提供了用于确保词汇保真度的技术。 不会执行对原始XML文档和XML文档的二进制编码版本之间的词法保真度的XML数据的操作。 这样的操作包括删除不必要的空白字符，某些数据类型转换，CRLF归一化，将双标签空元素“折叠”到单个标签空元素中，以及用另一个值替换实体引用或数字字符引用。 XML文档符合的XML模式可以指示XML文档将以词法保真模式存储。 另外或替代地，数据库语句（当被执行时）导致XML文档以二进制格式存储可能如此指示。
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公开(公告)号：US07933935B2
公开(公告)日：2011-04-26
申请号：US11716074
申请日：2007-03-08
IPC分类号： G06F17/00
CPC分类号： G06F17/30923
摘要： A method is provided to efficiently evaluate an expression to determine the partition key for an XML document stored in a database without the entire XML document first being stored in temporary memory storage. The partition key is determined using streaming evaluation or incrementally using a DOM node tree as a portion of the document is read and stored in the buffer. The XML document is stored in the partition using the read portion of the document stored in the buffer and the remaining portion from the original source.
摘要翻译： 提供了一种方法来有效地评估表达式以确定存储在数据库中的XML文档的分区密钥，而不将整个XML文档首先存储在临时存储器存储器中。 当文档的一部分被读取并存储在缓冲器中时，使用流式评估或递增地使用DOM节点树来确定分区密钥。 使用存储在缓冲区中的文档的读取部分和原始源的剩余部分将XML文档存储在分区中。
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公开(公告)号：US07814117B2
公开(公告)日：2010-10-12
申请号：US11784341
申请日：2007-04-05
CPC分类号： G06F17/30911 , G06F17/30368 , G06F17/30938
摘要： A method and apparatus for computing queries in a way that is consistent with an index and the underlying base table is provided. A query is computed such that it is consistent with the state of an index and base table as of the last point at which the index and table were synchronized. For example, if an index is maintained asynchronously then it is not necessarily consistent with its base table when a query is to be run against the table and the index. Therefore, the query is computed such that it will be consistent with the last point at which the index and the table were synchronized. In one embodiment, a System Change Number (SCN) of the last successful synchronization operation is used to perform a flashback query on the table.
摘要翻译： 提供了一种以与索引和底层基表一致的方式计算查询的方法和装置。 计算一个查询，使得它与索引和基表的状态一致，该索引和基表与索引和表同步的最后一个点相同。 例如，如果异步维护索引，则当要对表和索引运行查询时，它不一定与其基表一致。 因此，计算查询使其与索引和表同步的最后一个点一致。 在一个实施例中，使用上一次成功同步操作的系统更改编号（SCN）来对表执行闪回查询。
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88.发明申请Mechanism For Deferred Rewrite Of Multiple Xpath Evaluations Over Binary XML 有权延迟重写二进制XML的Xpath评估机制公开(公告)号：US20100030726A1
公开(公告)日：2010-02-04
申请号：US12181725
申请日：2008-07-29
IPC分类号： G06F17/30
CPC分类号： G06F17/30935 , G06F17/30911
摘要： A mechanism is provided for improving the performance of particular database queries operating on a view comprising binary-encoded XML. The key to improving performance is to determine whether a XML index is available to improve the computation of XPath data before deriving an optimized execution plan for a particular query. When a XML index is not available to help expedite the computation of binary-encoded XML, then deferring the computation of the XPath data until after the view merge stage avoids unnecessary computation of XPaths that are part of the view but not needed for the particular query.
摘要翻译： 提供了一种机制，用于提高在包含二进制编码XML的视图上操作的特定数据库查询的性能。 提高性能的关键是确定在为特定查询获得优化的执行计划之前，XML索引是否可用于改进XPath数据的计算。 当XML索引不可用以帮助加速二进制编码的XML的计算时，则推迟XPath数据的计算，直到视图合并阶段之后，避免不必要的计算XPath作为视图的一部分，但不需要特定的查询 。
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89.发明申请TECHNIQUES FOR MORE EFFICIENT GENERATION OF XML EVENTS FROM XML DATA SOURCES 有权从XML数据源更有效地生成XML事件的技术公开(公告)号：US20090125693A1
公开(公告)日：2009-05-14
申请号：US11938020
申请日：2007-11-09
IPC分类号： G06F13/00
CPC分类号： G06F17/272 , G06F17/2247 , G06F17/30938
摘要： One may increase the efficiency of an XML event-generating process by reducing the number of requests to allocate or deallocate system memory. Such reduction may occur as the result of pre-allocating a memory chunk of sufficient size to contain all of the memory buffers required by a particular event-generating process. Instead of allocating new memory chunks for new memory buffers, an application may store any required buffers within the pre-allocated memory chunk. A sufficient memory size may be estimated by performing the event-generating process on a training set of XML documents. Also, an application may re-use buffers during the process or between different iterations of the process, thus avoiding the need to deallocate and reallocate memory that is essentially being used for the same purpose.
摘要翻译： 可以通过减少分配或释放系统内存的请求数来提高XML事件生成过程的效率。 这种减少可以作为预先分配足够大小的存储器块以包含特定事件生成过程所需的所有存储器缓冲器的结果而发生。 代替为新的内存缓冲区分配新的内存块，应用程序可以在预先分配的内存块内存储任何所需的缓冲区。 可以通过对XML文档的训练集执行事件生成过程来估计足够的存储器大小。 此外，应用程序可以在进程期间或在进程的不同迭代之间重新使用缓冲区，从而避免需要释放并重新分配基本上被用于相同目的的存储器。
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公开(公告)号：US20090125495A1
公开(公告)日：2009-05-14
申请号：US11938017
申请日：2007-11-09
IPC分类号： G06F17/30
CPC分类号： G06F17/30938 , G06F17/2247 , G06F17/2258
摘要： A database system may perform a streaming evaluation of an XPath expression by utilizing an XPath evaluation component in tandem with an XML event-streaming component. For a more optimal filtered streaming evaluation, the XML event-streaming component may provide an interface whereby the evaluation component sends certain criteria to the event-streaming component when requesting an XML event. The criteria may be based on a next unmatched step in the XPath expression. In response to the request for an XML event, the event-streaming component may only return events that match the criteria. The evaluation component may be, for example, a compiled state machine for the XPath expression. The criteria may be pre-compiled for each possible state in the state machine. The event-streaming component may also utilize the criteria along with schema information to skip parsing of certain segments of XML data.
摘要翻译： 数据库系统可以通过与XML事件流组件一起使用XPath评估组件来执行XPath表达式的流评估。 对于更优化的过滤流评估，XML事件流组件可以提供一个接口，当请求XML事件时，评估组件向事件流组件发送特定标准。 标准可能基于XPath表达式中的下一个不匹配的步骤。 响应对XML事件的请求，事件流组件可能只返回符合条件的事件。 评估组件可以是例如XPath表达式的编译状态机。 可以对状态机中的每个可能的状态预先准备标准。 事件流组件还可以利用标准以及模式信息来跳过某些XML数据段的解析。
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