公开(公告)号：US20080082560A1

公开(公告)日：2008-04-03

申请号：US11540341

申请日：2006-09-28

申请人： Abhyudaya Agrawal ,  Thomas Baby ,  Nipun Agarwal ,  Sam Idicula ,  Ravi Murthy ,  Eric Sedlar

发明人： Abhyudaya Agrawal ,  Thomas Baby ,  Nipun Agarwal ,  Sam Idicula ,  Ravi Murthy ,  Eric Sedlar

IPC分类号： G06F7/00

CPC分类号： G06F17/2247

摘要： In-place XML schema evolution occurs by evaluating an existing XML schema in a database system to see if it is compatible with a new XML schema. To determine if the old schema is compatible with the new schema, a lock-step traversal is performed on the two schemas. Each instruction in the old schema is compared to instructions in the new schema. Detected differences between the two schemas are evaluated to determine if existing XML documents are still compatible with the new schema. If they are, then an in-place schema evolution operation can take place. The in-place schema operation basically, involves appending the updated object information to the underlying object type and preserving the order of elements in a document by storing element mapping information on disk.

摘要翻译： 通过评估数据库系统中的现有XML模式来查看是否与新的XML模式兼容，就会发生就地XML模式演进。 为了确定旧模式是否与新模式兼容，在两个模式上执行锁步遍历。 将旧模式中的每个指令与新模式中的指令进行比较。 对两个模式之间的检测差异进行评估，以确定现有XML文档是否仍然与新模式兼容。 如果它们是，则可以进行就地模式演进操作。 就地模式操作基本上包括将更新的对象信息附加到底层对象类型，并通过在盘上存储元素映射信息来保留文档中元素的顺序。

公开(公告)号：US07395271B2

公开(公告)日：2008-07-01

申请号：US10648497

申请日：2003-08-25

申请人： Sam Idicula ,  Nipun Agarwal ,  Ravi Murthy ,  Eric Sedlar ,  Sivasankaran Chandrasekar

发明人： Sam Idicula ,  Nipun Agarwal ,  Ravi Murthy ,  Eric Sedlar ,  Sivasankaran Chandrasekar

IPC分类号： G06F17/30

CPC分类号： G06F17/30914 ,  G06F17/2247 ,  G06F17/227 ,  Y10S707/99932 ,  Y10S707/99943 ,  Y10S707/99944

摘要： A method and system for evolving XML-schema-based data to conform to an evolved XML schema is disclosed. Based on an existing XML schema and an instance document that is based on the existing XML schema, an XML-schema-independent form of the instance document is generated. Based on a set of specified transformations and the XML-schema-independent form of the instance document, an evolved instance document is generated. The evolved instance document conforms to an evolved XML schema that incorporates changes to the existing XML schema. Techniques described herein are flexible enough to accommodate a wide variety of evolutions to XML schemas.

摘要翻译： 公开了一种用于演进基于XML模式的数据以符合演进的XML模式的方法和系统。 基于现有XML模式和基于现有XML模式的实例文档，生成实例文档的与XML模式无关的形式。 基于一组指定的转换和实例文档的与XML模式无关的形式，生成了演进的实例文档。 演进的实例文档符合演进的XML模式，其中包含对现有XML模式的更改。 本文描述的技术足够灵活，以适应各种演进到XML模式。

公开(公告)号：US07610304B2

公开(公告)日：2009-10-27

申请号：US11294894

申请日：2005-12-05

申请人： Namit Jain ,  Nipun Agarwal ,  Ravi Murthy ,  Syam Pannala ,  Vikram Kapoor ,  Eric Sedlar

发明人： Namit Jain ,  Nipun Agarwal ,  Ravi Murthy ,  Syam Pannala ,  Vikram Kapoor ,  Eric Sedlar

IPC分类号： G06F17/30 ,  G06F15/16

CPC分类号： G06F17/30504 ,  G06F17/30115 ,  Y10S707/99931 ,  Y10S707/99943

摘要： A method and apparatus for performing file system operations involving a link is provided. A request to perform a file system operation involving a link is received from a client at a database server. The link may establish a relationship a source resource has to a target resource. The source resource and the target resource may be stored within a repository implemented by a storage medium, such as a database. The database server may perform the file system operation by storing, in the database, one or more link records that identifies the link between the first resource and the second resource. File system operations, such as a NFS file system operation, which involve links may be performed at a database management system.

摘要翻译： 提供一种用于执行涉及链接的文件系统操作的方法和装置。 从数据库服务器的客户端接收到执行涉及链接的文件系统操作的请求。 该链接可以建立源资源与目标资源的关系。 源资源和目标资源可以存储在由诸如数据库的存储介质实现的存储库中。 数据库服务器可以通过在数据库中存储标识第一资源和第二资源之间的链接的一个或多个链接记录来执行文件系统操作。 可以在数据库管理系统中执行涉及链接的诸如NFS文件系统操作的文件系统操作。

公开(公告)号：US07051033B2

公开(公告)日：2006-05-23

申请号：US10260384

申请日：2002-09-27

申请人： Nipun Agarwal ,  Eric Sedlar ,  Ravi Murthy ,  Namit Jain

发明人： Nipun Agarwal ,  Eric Sedlar ,  Ravi Murthy ,  Namit Jain

IPC分类号： G06F17/30 ,  G06F17/00

CPC分类号： G06F17/30595 ,  G06F17/30917 ,  Y10S707/99931 ,  Y10S707/99933 ,  Y10S707/99942 ,  Y10S707/99943 ,  Y10S707/99945

摘要： A hierarchy may be explicitly or implicitly reflected in existing data maintained external to hierarchy structures. Such hierarchies are referred to herein as a “pre-existing hierarchies”. Techniques are described herein for capturing a pre-existing hierarchy in hierarchy structures. After a pre-existing hierarchy has been captured, there exist two independent sets of data that reflect the hierarchy: the external hierarchy definition and the internal hierarchy definition. Changing either hierarchy definition changes the hierarchy. Therefore, to maintain a consistent reflection of the hierarchy, the internal hierarchy definition must be modified in response to changes made to the external hierarchy definition, and the external hierarchy definition must be modified in response to changes made to the internal hierarchy definition. Various techniques are described for maintaining consistency between the two hierarchy definitions.

公开(公告)号：US20060101041A1

公开(公告)日：2006-05-11

申请号：US11315835

申请日：2005-12-21

申请人： Nipun Agarwal ,  Eric Sedlar ,  Ravi Murthy ,  Namit Jain

发明人： Nipun Agarwal ,  Eric Sedlar ,  Ravi Murthy ,  Namit Jain

IPC分类号： G06F7/00

CPC分类号： G06F17/30595 ,  G06F17/30917 ,  Y10S707/99931 ,  Y10S707/99933 ,  Y10S707/99942 ,  Y10S707/99943 ,  Y10S707/99945

摘要： A hierarchy may be explicitly or implicitly reflected in existing data maintained external to hierarchy structures. Such hierarchies are referred to herein as a “pre-existing hierarchies”. Techniques are described herein for capturing a pre-existing hierarchy in hierarchy structures. After a pre-existing hierarchy has been captured, there exist two independent sets of data that reflect the hierarchy: the external hierarchy definition and the internal hierarchy definition. Changing either hierarchy definition changes the hierarchy. Therefore, to maintain a consistent reflection of the hierarchy, the internal hierarchy definition must be modified in response to changes made to the external hierarchy definition, and the external hierarchy definition must be modified in response to changes made to the internal hierarchy definition. Various techniques are described for maintaining consistency between the two hierarchy definitions.

公开(公告)号：US08949455B2

公开(公告)日：2015-02-03

申请号：US11284521

申请日：2005-11-21

申请人： Sam Idicula ,  Nipun Agarwal ,  Ravi Murthy ,  Eric Sedlar

发明人： Sam Idicula ,  Nipun Agarwal ,  Ravi Murthy ,  Eric Sedlar

IPC分类号： G06F15/173 ,  G06F17/30

CPC分类号： G06F17/30893 ,  G06F12/0246 ,  G06F12/0817 ,  G06F12/0833 ,  G06F17/30091 ,  G06F17/30595 ,  G06F2212/62 ,  G06F2212/622 ,  G06F2212/7204

摘要： A method and apparatus for processing path-based database operations is provided. According to one aspect, a path cache is maintained. For each hierarchical node that is traversed during a path-determining operation, it is determined whether a cache entry corresponding to that node is already contained in the path cache. If such a cache entry is already contained in the path cache, then the path indicated in that cache entry is used to complete the pathname for the node for which the operation is being performed. As a result, hierarchically higher nodes do not need to be traversed to complete the operation. Alternatively, if such a cache entry is not already contained in the path cache, then a cache entry for the node currently being traversed is generated and inserted into the path cache for use in subsequent path-determining operations.

摘要翻译： 提供了一种用于处理基于路径的数据库操作的方法和装置。 根据一个方面，维护路径高速缓存。 对于在路径确定操作期间遍历的每个分级节点，确定与该节点相对应的高速缓存条目是否已经包含在路径高速缓存中。 如果这样的缓存条目已经包含在路径缓存中，则使用该缓存条目中指示的路径来完成正在执行该操作的节点的路径名。 因此，不需要遍历层次更高的节点来完成操作。 或者，如果这样的高速缓存条目尚未包含在路径高速缓存中，则生成用于当前正在遍历的节点的高速缓存条目并将其插入到路径高速缓存中以用于随后的路径确定操作。

公开(公告)号：US20050050056A1

公开(公告)日：2005-03-03

申请号：US10648497

申请日：2003-08-25

申请人： Sam Idicula ,  Nipun Agarwal ,  Ravi Murthy ,  Eric Sedlar ,  Sivasankaran Chandrasekar

发明人： Sam Idicula ,  Nipun Agarwal ,  Ravi Murthy ,  Eric Sedlar ,  Sivasankaran Chandrasekar

IPC分类号： G06F17/22 ,  G06F17/30 ,  G06F7/00

CPC分类号： G06F17/30914 ,  G06F17/2247 ,  G06F17/227 ,  Y10S707/99932 ,  Y10S707/99943 ,  Y10S707/99944

摘要： A method and system for evolving XML-schema-based data to conform to an evolved XML schema is disclosed. Based on an existing XML schema and an instance document that is based on the existing XML schema, an XML-schema-independent form of the instance document is generated. Based on a set of specified transformations and the XML-schema-independent form of the instance document, an evolved instance document is generated. The evolved instance document conforms to an evolved XML schema that incorporates changes to the existing XML schema. Techniques described herein are flexible enough to accommodate a wide variety of evolutions to XML schemas.

摘要翻译： 公开了一种用于演进基于XML模式的数据以符合演进的XML模式的方法和系统。 基于现有XML模式和基于现有XML模式的实例文档，生成实例文档的与XML模式无关的形式。 基于一组指定的转换和实例文档的与XML模式无关的形式，生成了演进的实例文档。 演进的实例文档符合演进的XML模式，其中包含对现有XML模式的更改。 本文描述的技术足够灵活，以适应各种演进到XML模式。

公开(公告)号：US20070130157A1

公开(公告)日：2007-06-07

申请号：US11294894

申请日：2005-12-05

申请人： Namit Jain ,  Nipun Agarwal ,  Ravi Murthy ,  Syam Pannala ,  Vikram Kapoor ,  Eric Sedlar

发明人： Namit Jain ,  Nipun Agarwal ,  Ravi Murthy ,  Syam Pannala ,  Vikram Kapoor ,  Eric Sedlar

IPC分类号： G06F17/30

CPC分类号： G06F17/30504 ,  G06F17/30115 ,  Y10S707/99931 ,  Y10S707/99943

摘要： A method and apparatus for performing file system operations involving a link is provided. A request to perform a file system operation involving a link is received from a client at a database server. The link may establish a relationship a source resource has to a target resource. The source resource and the target resource may be stored within a repository implemented by a storage medium, such as a database. The database server may perform the file system operation by storing, in the database, one or more link records that identifies the link between the first resource and the second resource. File system operations, such as a NFS file system operation, which involve links may be performed at a database management system.

摘要翻译： 提供一种用于执行涉及链接的文件系统操作的方法和装置。 从数据库服务器的客户端接收到执行涉及链接的文件系统操作的请求。 该链接可以建立源资源与目标资源的关系。 源资源和目标资源可以存储在由诸如数据库的存储介质实现的存储库中。 数据库服务器可以通过在数据库中存储标识第一资源和第二资源之间的链接的一个或多个链接记录来执行文件系统操作。 可以在数据库管理系统中执行涉及链接的诸如NFS文件系统操作的文件系统操作。

公开(公告)号：US07158981B2

公开(公告)日：2007-01-02

申请号：US11315835

申请日：2005-12-21

申请人： Nipun Agarwal ,  Eric Sedlar ,  Ravi Murthy ,  Namit Jain

发明人： Nipun Agarwal ,  Eric Sedlar ,  Ravi Murthy ,  Namit Jain

IPC分类号： G06F17/00 ,  G06F7/00

CPC分类号： G06F17/30595 ,  G06F17/30917 ,  Y10S707/99931 ,  Y10S707/99933 ,  Y10S707/99942 ,  Y10S707/99943 ,  Y10S707/99945

摘要： A hierarchy may be explicitly or implicitly reflected in existing data maintained external to hierarchy structures. Such hierarchies are referred to herein as a “pre-existing hierarchies”. Techniques are described herein for capturing a pre-existing hierarchy in hierarchy structures. After a pre-existing hierarchy has been captured, there exist two independent sets of data that reflect the hierarchy: the external hierarchy definition and the internal hierarchy definition. Changing either hierarchy definition changes the hierarchy. Therefore, to maintain a consistent reflection of the hierarchy, the internal hierarchy definition must be modified in response to changes made to the external hierarchy definition, and the external hierarchy definition must be modified in response to changes made to the internal hierarchy definition. Various techniques are described for maintaining consistency between the two hierarchy definitions.

摘要翻译： 层次结构可以在层次结构外部维护的现有数据中显式或隐式地反映出来。 这样的层次结构在本文中称为“预先存在的层级”。 这里描述了用于在层次结构中捕获预先存在的层次结构的技术。 在捕获了一个预先存在的层次结构之后，存在反映层次结构的两个独立的数据集：外部层次结构定义和内部层次结构定义。 更改层次结构定义会更改层次结构。 因此，为了保持层次结构的一致反映，必须根据对外部层次结构定义所做的更改来修改内部层次结构定义，并且必须根据对内部层次结构定义的更改来修改外部层次结构定义。 描述了用于维持两个层次结构定义之间的一致性的各种技术。

公开(公告)号：US20060117049A1

公开(公告)日：2006-06-01

申请号：US10999864

申请日：2004-11-29

申请人： Namit Jain ,  Fei Ge ,  Ravi Murthy ,  Subramanian Muralidhar ,  Nipun Agarwal ,  Eric Sedlar

发明人： Namit Jain ,  Fei Ge ,  Ravi Murthy ,  Subramanian Muralidhar ,  Nipun Agarwal ,  Eric Sedlar

IPC分类号： G06F17/00

CPC分类号： G06F17/30091 ,  G06F17/30233 ,  Y10S707/99931

摘要： A method and apparatus for processing path-based database operations is provided. According to one aspect, a “parent row ID” column is added to a directory links table. For each row in the table, the value of the “parent row ID” column indicates the row ID, in the table, of the node that is that row's node's parent in the file hierarchy. To determine whether a particular node is within a specified path of the file hierarchy, the particular node's pathname is derived by visiting child-to-parent links indicated in the table and prepending, to the front of a pathname being constructed for the particular node, node names indicated in the visited rows. Each parent node's row in the directory links table is located using the “parent row ID” column of the child node's row. The resulting pathname is compared with the specified path to determine whether the particular node exists therein.