公开(公告)号：US20100318584A1

公开(公告)日：2010-12-16

申请号：US12484185

申请日：2009-06-13

申请人： Muralidhar Krishnaprasad ,  Maoni Z. Stephens ,  Lu Xun ,  Anil K. Nori

发明人： Muralidhar Krishnaprasad ,  Maoni Z. Stephens ,  Lu Xun ,  Anil K. Nori

IPC分类号： G06F12/00 ,  G06F12/08

CPC分类号： G06F12/0253 ,  G06F12/0806

摘要： Techniques are described herein for managing access to a distributed cache during garbage collection. When garbage collection is to be performed with respect to a node, the node may send a request to a data manager requesting to have an instance of data module(s) included in the node that are in a primary state placed in a secondary state. The data manager may change the state of the data module(s) to the secondary state. The data manager may change the state of another instance of the data module(s) that is included in another node to the primary state. When the garbage collection is complete with respect to the node, the node may send another request to the data manager requesting that the data module(s) that were placed in the secondary state be returned to the primary state. The data manager may return those data module(s) to the primary state.

摘要翻译： 本文描述了在垃圾收集期间管理对分布式缓存的访问的技术。 当相对于节点执行垃圾回收时，节点可以向数据管理器发送一个请求，该数据管理器请求将节点中包括的处于主状态的数据模块的实例置于次级状态。 数据管理器可以将数据模块的状态更改为辅助状态。 数据管理器可以将包含在另一个节点中的数据模块的另一个实例的状态改变为主状态。 当相对于节点完成垃圾收集时，节点可以向数据管理器发送另一个请求，请求将处于次要状态的数据模块返回到主状态。 数据管理器可以将这些数据模块返回到主状态。

公开(公告)号：US07853619B2

公开(公告)日：2010-12-14

申请号：US10949895

申请日：2004-09-23

申请人： Qin Yu ,  Muralidhar Krishnaprasad ,  Subramanian Muralidhar ,  Thomas Chang ,  Susan Kotsovolos

发明人： Qin Yu ,  Muralidhar Krishnaprasad ,  Subramanian Muralidhar ,  Thomas Chang ,  Susan Kotsovolos

IPC分类号： G06F7/00 ,  G06F17/30

CPC分类号： G06F17/30318 ,  G06F17/30607

摘要： Methods and apparatus for enabling a plurality of table columns arranged to be associated with large objects (LOBs) to share a single LOB data segment within a database are disclosed. According to one aspect of the present invention, a method for allocating space associated with at least a first column arranged to accommodate LOB data and a second column arranged to accommodate LOB data includes allocating a first LOB data segment. The method also includes associating both the first column and the second column with the first LOB data segment.

摘要翻译： 公开了一种用于启用被布置为与大对象（LOB）相关联的多个表列以在数据库内共享单个LOB数据段的方法和装置。 根据本发明的一个方面，一种用于分配空间的方法，所述方法用于分配与至少布置成容纳LOB数据的第一列相关联的空间，以及用于容纳LOB数据的第二列，包括分配第一LOB数据段。 该方法还包括将第一列和第二列与第一LOB数据段相关联。

公开(公告)号：US20100293332A1

公开(公告)日：2010-11-18

申请号：US12469688

申请日：2009-05-21

申请人： Muralidhar Krishnaprasad ,  Sudhir Mohan Jorwekar ,  Sharique Muhammed ,  Subramanian Muralidhar ,  Anil K. Nori

发明人： Muralidhar Krishnaprasad ,  Sudhir Mohan Jorwekar ,  Sharique Muhammed ,  Subramanian Muralidhar ,  Anil K. Nori

IPC分类号： G06F12/08 ,  G06F17/30 ,  G06F12/00

CPC分类号： G06F12/0813 ,  G06F12/0866 ,  G06F17/30949

摘要： In response to a request including a state object, which can indicate a state of an enumeration of a cache, the enumeration can be continued by using the state object to identify and send cache data. Also, an enumeration of cache units can be performed by traversing a data structure that includes object nodes, which correspond to cache units, and internal nodes. An enumeration state stack can indicate a current state of the enumeration, and can include state nodes that correspond to internal nodes in the data structure. Additionally, a cache index data structure can include a higher level table and a lower level table. The higher level table can have a leaf node pointing to the lower level table, and the lower level table can have a leaf node pointing to one of the cache units. Moreover, the lower level table can be associated with a tag.

摘要翻译： 响应于包括可指示高速缓存的枚举状态的状态对象的请求，可以通过使用状态对象来识别和发送高速缓存数据来继续枚举。 此外，可以通过遍历包括对应于高速缓存单元的对象节点和内部节点的数据结构来执行缓存单元的枚举。 枚举状态堆栈可以指示枚举的当前状态，并且可以包括对应于数据结构中的内部节点的状态节点。 此外，缓存索引数据结构可以包括更高级别的表和较低级别的表。 较高级别的表可以具有指向低级表的叶节点，并且下级表可以具有指向其中一个高速缓存单元的叶节点。 此外，较低级别的表可以与标签相关联。

公开(公告)号：US07730080B2

公开(公告)日：2010-06-01

申请号：US11474038

申请日：2006-06-23

申请人： Zhen Hua Liu ,  Muralidhar Krishnaprasad ,  Hui Joe Chang ,  Anand Manikutty ,  James W. Warner ,  Vikas Arora ,  Susan Kotsovolos

发明人： Zhen Hua Liu ,  Muralidhar Krishnaprasad ,  Hui Joe Chang ,  Anand Manikutty ,  James W. Warner ,  Vikas Arora ,  Susan Kotsovolos

IPC分类号： G06F7/00 ,  G06F17/30

CPC分类号： G06F17/30935

摘要： A method for processing queries is provided. A first representation of a query is generated, where the query includes a certain operator that is to be performed based on an XPath expression that is expandable into multiple location paths. The first representation of the query is rewritten into a second representation that corresponds to an equivalent query, where rewriting the first representation includes expanding the XPath expression into the plurality of location paths and, based on the certain operator, including a plurality of operators in the second representation, where the plurality of operators include: a first set of operators that is to be performed based on each of the plurality of location paths, and a second set of operators that is to be performed based on data returned from at least one operator included in the first set of operators. The query may thereafter be executed based on the second representation. The second representation may be further rewritten to third representation depending on the physical storage of XML.

摘要翻译： 提供了一种处理查询的方法。 生成查询的第一个表示形式，其中查询包含一个基于可扩展到多个位置路径的XPath表达式执行的某个运算符。 查询的第一表示被重写成对应于等效查询的第二表示，其中重写第一表示包括将XPath表达式扩展到多个位置路径中，并且基于特定运算符，包括多个运算符 第二表示，其中所述多个运算符包括：将基于所述多个位置路径中的每一个来执行的第一组运算符，以及将基于从至少一个运算符返回的数据来执行的第二组运算符 包含在第一组运算符中。 此后可以基于第二表示来执行查询。 取决于XML的物理存储，第二表示可以进一步重写为第三表示。

公开(公告)号：US07685150B2

公开(公告)日：2010-03-23

申请号：US11237286

申请日：2005-09-27

申请人： Anand Manikutty ,  Muralidhar Krishnaprasad ,  Zhen Hua Liu ,  Vikas Arora ,  James W. Warner ,  Rohan Angrish ,  Hui Zhang

发明人： Anand Manikutty ,  Muralidhar Krishnaprasad ,  Zhen Hua Liu ,  Vikas Arora ,  James W. Warner ,  Rohan Angrish ,  Hui Zhang

IPC分类号： G06F17/30

CPC分类号： G06F17/30935 ,  Y10S707/99943

摘要： Optimization is provided for database statements involving XML data, e.g., XPath and XQuery, which operate over views that use aggregate set operators, e.g., UNION ALL. As part of a “view merge” stage of query transformation, the query that operates over the view is merged with a query that defines the view. One or more expressions (e.g., operators, predicates, virtual table constructs) from the query that operates over the view are then “pushed down” to operate on the individual underlying XML data constructs. “Branch elimination” is performed based on the structure of the view and the query acting over the view, based on which it is possible to determine whether any of the sub-queries, if executed, would result in the return of zero rows. If so, then such branches are eliminated from the transformed query, leaving a reduced set of data containers on which to execute the query.

摘要翻译： 针对涉及XML数据的数据库语句（例如，XPath和XQuery）提供优化，该数据库语句对使用聚合集合运算符（例如UNION ALL）的视图进行操作。 作为查询转换的“视图合并”阶段的一部分，通过视图操作的查询与定义视图的查询合并。 然后，通过视图操作的查询中的一个或多个表达式（例如，运算符，谓词，虚拟表结构）被“推下”以对各个底层XML数据结构进行操作。 基于视图的结构和在视图上执行的查询执行“分支消除”，基于此可以确定是否任何子查询（如果被执行）将导致返回零行。 如果是这样，则从转换的查询中消除这样的分支，留下一组减少的数据容器来执行查询。

公开(公告)号：US20080235210A1

公开(公告)日：2008-09-25

申请号：US11726275

申请日：2007-03-21

申请人： Muralidhar Krishnaprasad ,  Meeten Bhavsar

发明人： Muralidhar Krishnaprasad ,  Meeten Bhavsar

IPC分类号： G06F17/30

CPC分类号： G06F17/30011

摘要： Systems, methods, and other embodiments associated with logically expanding a document and determining the relevance of the logically expanded document to a query are described. One method embodiment includes searching an index to locate a document identifier for a document in which a query term appears. The method includes determining whether the index entry includes an expansion identifier, and, if so, producing a logically expanded document. The logically expanded document may include both a document associated with the document identifier and a document associated with the expansion identifier. The method may then determine a relevance value of the logically expanded document with respect to the query and may provide a signal corresponding to the relevance value.

摘要翻译： 描述了与逻辑上扩展文档相关联的系统，方法和其他实施例，并且确定逻辑上扩展的文档与查询的相关性。 一个方法实施例包括搜索索引以定位其中出现查询词的文档的文档标识符。 该方法包括确定索引条目是否包括扩展标识符，如果是，则生成逻辑上扩展的文档。 逻辑上扩展的文档可以包括与文档标识符相关联的文档和与扩展标识符相关联的文档。 该方法然后可以确定相对于查询的逻辑扩展文档的相关性值，并且可以提供对应于相关性值的信号。

公开(公告)号：US20080222063A1

公开(公告)日：2008-09-11

申请号：US11714418

申请日：2007-03-06

申请人： Muralidhar Krishnaprasad ,  Ciya Liao ,  Thomas H. Chang ,  Meeten Bhavsar

发明人： Muralidhar Krishnaprasad ,  Ciya Liao ,  Thomas H. Chang ,  Meeten Bhavsar

IPC分类号： G06F15/18

CPC分类号： H04L51/12

摘要： Systems, methods, and other embodiments associated with identifying and selectively deleting duplicate search results are described. One example system embodiment includes logic to receive an identity indicator from a search logic. The identity indicator is associated with a search item that the search logic determines to be relevant to a search request. The example system may also include logic to determine whether the search result associated with the identity indicator is a duplicate result based on comparing the identity indicator to another identity indicator associated with another search result.

摘要翻译： 描述与识别和选择性地删除重复搜索结果相关联的系统，方法和其他实施例。 一个示例系统实施例包括从搜索逻辑接收身份指示符的逻辑。 身份指示符与搜索项目相关联，搜索逻辑确定与搜索请求相关。 该示例系统还可以包括用于基于将身份指示符与与另一搜索结果相关联的另一身份指示符进行比较来确定与身份指示符相关联的搜索结果是否是重复结果的逻辑。

公开(公告)号：US07386567B2

公开(公告)日：2008-06-10

申请号：US10956300

申请日：2004-09-30

申请人： Anand Manikutty ,  Muralidhar Krishnaprasad ,  Ravi Murthy ,  Visar Nimani ,  James Warner ,  Eric Sedlar ,  Neema Jalali ,  Bhushan Khaladkar

发明人： Anand Manikutty ,  Muralidhar Krishnaprasad ,  Ravi Murthy ,  Visar Nimani ,  James Warner ,  Eric Sedlar ,  Neema Jalali ,  Bhushan Khaladkar

IPC分类号： G06F17/30

CPC分类号： G06F17/3061 ,  G06F17/30923 ,  Y10S707/99943

摘要： Techniques are provided for changing data for an XML construct in an SQL/XML compliant database management system (DBMS). The DBMS allows instances of XML type to represent XML constructs, such as XML documents, XML elements, XML attributes, and fragments of XML documents. An SQL statement is received that includes an XML operator that operates on a particular component in an instance of XML type. During execution of the SQL statement, the XML operator is evaluated by modifying content for the component without modifying the entire instance. For example, an XML delete operator deletes the particular component from the instance. Other XML operators include an insert operator, an insert-before operator, an append-child operator, and an update operator. During execution, these operators may be rewritten to operate on existing SQL constructs, or evaluated by updating only some of the existing SQL constructs, or both.

摘要翻译： 提供技术用于在符合SQL / XML的数据库管理系统（DBMS）中更改XML构造的数据。 DBMS允许XML类型的实例表示XML构造，例如XML文档，XML元素，XML属性和XML文档片段。 收到一条SQL语句，其中包含一个在XML类型的实例中对特定组件进行操作的XML运算符。 在执行SQL语句期间，通过修改组件的内容而不修改整个实例来评估XML运算符。 例如，XML删除运算符从实例中删除特定组件。 其他XML运算符包括一个插入运算符，一个insert-before运算符，一个append-child运算符和一个update运算符。 在执行期间，这些运算符可能被重写为对现有的SQL结构进行操作，或者只通过更新现有的SQL结构或两者来评估。

公开(公告)号：US20080120322A1

公开(公告)日：2008-05-22

申请号：US11601147

申请日：2006-11-17

申请人： Zhen Hua Liu ,  Muralidhar Krishnaprasad ,  Hui Joe Chang ,  Vikas Arora

发明人： Zhen Hua Liu ,  Muralidhar Krishnaprasad ,  Hui Joe Chang ,  Vikas Arora

IPC分类号： G06F17/30

CPC分类号： G06F17/30911 ,  G06F17/30929

摘要： Commonly searched nodes of complex data types contained in a collection of XML documents can be projected to, and their values can be stored in, corresponding columns in XML Table Index tables in a database system. In one embodiment, those columns stores logical pointers, rather than raw values, of the complex data types. Domain indexes are further provided to index at least one of the columns of complex data types in XML Table Indexes. The inclusion of complex data types and domain indexes provide a more efficient mechanism for searching domain specific data, such as audio, video, text stored in the collection of XML documents. Query optimizer logic of the database system can prepare one or more query execution plans for a submitted query including a plan that leverages XML Table Indexes and domain indexes and select a query execution plan based on cost information.

摘要翻译： 可以将包含在XML文档集合中的复杂数据类型的常见搜索节点投影到其数据库系统中的XML表索引表中的相应列中，并将其值存储在相应的列中。 在一个实施例中，这些列存储复杂数据类型的逻辑指针而不是原始值。 进一步提供域索引以索引XML表索引中复杂数据类型的列中的至少一列。 包含复杂数据类型和域索引提供了一种更有效的机制，用于搜索存储在XML文档集合中的域特定数据，例如音频，视频，文本。 数据库系统的查询优化器逻辑可以为提交的查询准备一个或多个查询执行计划，包括利用XML表索引和域索引的计划，并根据成本信息选择查询执行计划。

公开(公告)号：US20070220268A1

公开(公告)日：2007-09-20

申请号：US11680559

申请日：2007-02-28

申请人： Muralidhar Krishnaprasad ,  Sachin Bhatkar ,  Visar Nimani ,  Thomas Chang ,  Meeten Bhavsar

发明人： Muralidhar Krishnaprasad ,  Sachin Bhatkar ,  Visar Nimani ,  Thomas Chang ,  Meeten Bhavsar

IPC分类号： H04L9/00

CPC分类号： G06F17/30477 ,  G06F17/30427 ,  H04L63/0815

摘要： A flexible and extensible architecture allows for secure searching across an enterprise. Such an architecture can provide a simple Internet-like search experience to users searching secure content inside (and outside) the enterprise. The architecture allows for the crawling and searching of a variety or sources across an enterprise, regardless of whether any of these sources conform to a conventional user role model. The architecture further allows for security attributes to be submitted at query time, for example, in order to provide real-time secure access to enterprise resources. The user query also can be transformed to provide for dynamic querying that provides for a more current result list than can be obtained for static queries.

摘要翻译： 灵活可扩展的架构允许跨企业进行安全搜索。 这样的架构可以为在企业内部（和外部）搜索安全内容的用户提供简单的类似Internet的搜索体验。 该架构允许在整个企业中爬行和搜索各种或多个源，无论这些源是否符合常规用户角色模型。 该体系结构进一步允许在查询时提交安全属性，例如为了提供对企业资源的实时安全访问。 用户查询也可以被转换以提供动态查询，其提供比静态查询可获得的更多当前结果列表。