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    • 1. 发明授权
    • Transient range versioning based on redirection
    • 基于重定向的瞬态范围版本控制
    • US08117170B2
    • 2012-02-14
    • US10711808
    • 2004-10-06
    • James C. KleeweinEdison Lao Ting
    • James C. KleeweinEdison Lao Ting
    • G06F7/00G06F17/30
    • G06F17/30309
    • A method (and an article of manufacture having computer readable program code to implement the method) is disclosed to version a node range and locate a versioned node range in a storage architecture, wherein the method comprises: maintaining a set of node ranges, with each node range being formed from a range of node ID values assigned to each node among a plurality of nodes, receiving a node modification request for a node range from a database system, versioning the node range by copying (to a storage) a node range to which the node modification request is to be made, labeling the copied node range with a timestamp, locating the labeled node range via the timestamp and a hash on the node range, and outputting the located labeled node range. Optionally, versioning is done by shadowing nodes in the range to a version hash table based on a range identifier.
    • 公开了一种方法(以及具有用于实现该方法的计算机可读程序代码的制造物品),用于对节点范围进行版本定位并将存储体系结构中的版本化节点范围定位,其中所述方法包括:维护一组节点范围, 节点范围从分配给多个节点中的每个节点的节点ID值的范围形成,从数据库系统接收节点范围的节点修改请求,通过将节点范围复制(存储)到节点范围来对节点范围进行版本化 要进行节点修改请求,用时间戳标记复制的节点范围,经由时间戳定位标记的节点范围,并在节点范围上定位散列,并输出定位的标记节点范围。 可选地,版本控制通过基于范围标识符将范围内的节点映射到版本哈希表来完成。
    • 4. 发明授权
    • Isolated ordered regions (IOR) prefetching and page replacement
    • 隔离有序区域(IOR)预取和页面替换
    • US07165147B2
    • 2007-01-16
    • US10604453
    • 2003-07-22
    • Edison Lao TingJames C. Kleewein
    • Edison Lao TingJames C. Kleewein
    • G06F12/00G06F12/12
    • G06F12/0862G06F12/121
    • The concept of isolated ordered regions to maintain coordinates of nodes is used by associating each node with coordinates relative to a containing region. Modifications to nodes within a region only affect the nodes in that region, and not nodes in other regions. Traversals that retrieve information from the nodes can rebase the coordinates from their containing region and return with a total order. Access patterns and usage are used to recognize and prefetch pages. The probability of revisiting traversed nodes are identified and pages in a bufferpool are replaced based upon the identified probabilities (e.g., replacing pages with the least probability of a revisit).
    • 通过将每个节点与相对于包含区域的坐标相关联来使用隔离有序区域维持节点坐标的概念。 对区域内节点的修改仅影响该区域中的节点,而不影响其他区域中的节点。 从节点检索信息的遍历可以从其包含的区域中重新调整坐标,并以总顺序返回。 访问模式和用法用于识别和预取页面。 识别遍历节点的重新访问概率,并且基于所识别的概率来替换缓冲池中的页面(例如,替换具有最小访问概率的页面)。
    • 7. 发明授权
    • Method and apparatus for handling a LET binding
    • 用于处理LET绑定的方法和装置
    • US07698295B2
    • 2010-04-13
    • US11684410
    • 2007-03-09
    • Kevin Scott BeyerEdison Lao Ting
    • Kevin Scott BeyerEdison Lao Ting
    • G06F17/30
    • G06F17/30929Y10S707/99943
    • An apparatus and method for handling a LET binding used in a WHERE clause of an XQuery FLWOR expression during an XML pivot join procedure. XPath steps under a LET binding are identified and marked as bindings. During a match graph construction phase of the pivot join procedure, the bindings are linked to a first common non-LET binding ancestor, while traversing from the bottom up. A location identifier for each binding is truncated to the location identifier of the first common non-LET binding ancestor to create a truncated location identifier. The truncated location identifier is compared to a node identification of a FOR binding of the XQuery FLWOR expression. A match of the node identifications will qualify the XML document and the XML document is returned by the XML pivot join procedure.
    • 一种用于在XML枢轴连接过程中处理XQuery FLWOR表达式的WHERE子句中使用的LET绑定的装置和方法。 识别LET绑定下的XPath步骤,并将其标记为绑定。 在枢轴连接过程的匹配图构造阶段期间,绑定链接到第一个公共非LET绑定祖先,同时从下往上遍历。 每个绑定的位置标识符被截断为第一个公共非LET绑定祖先的位置标识符以创建截断的位置标识符。 将截断的位置标识符与XQuery FLWOR表达式的FOR绑定的节点标识进行比较。 节点标识的匹配将限定XML文档,并且XML文档由XML枢轴连接过程返回。
    • 8. 发明授权
    • Apparatus and method for skipping XML index scans with common ancestors of a previously failed predicate
    • 用以前故障谓词的共同祖先跳过XML索引扫描的设备和方法
    • US07552119B2
    • 2009-06-23
    • US11613757
    • 2006-12-20
    • Edison Lao TingTuong Chanh Truong
    • Edison Lao TingTuong Chanh Truong
    • G06F17/30
    • G06F17/30938Y10S707/99936Y10S707/99943
    • An apparatus and method are disclosed for skipping XML index scans with common ancestors of a previously failed predicate. An XML index is scanned by an XML index scan to filter entries of the index matching at least one search value (predicate) of an XML query. When the XML index scan finds a matching entry, the entry is passed to an XPath evaluation component. The XPath evaluation component evaluates the entry against remaining predicates of the XML query for further qualification. When the XPath evaluation component disqualifies an entry, the XPath evaluation component provides feedback to the XML index scan to skip remaining entries comprising a common ancestor of the disqualified entry's path. The XML index scan can then efficiently skip index entries that will not qualify against the XML query.
    • 公开了一种用于跳过具有先前故障谓词的共同祖先的XML索引扫描的装置和方法。 通过XML索引扫描扫描XML索引,以过滤与XML查询的至少一个搜索值(谓词)匹配的索引的条目。 当XML索引扫描找到匹配的条目时,该条目将传递给XPath评估组件。 XPath评估组件根据XML查询的剩余谓词评估条目以进一步验证。 当XPath评估组件取消条目资格时,XPath评估组件向XML索引扫描提供反馈,以跳过包含不合格条目路径的共同祖先的剩余条目。 然后,XML索引扫描可以有效地跳过不符合XML查询条件的索引条目。