Leveraging Structured XML Index Data For Evaluating Database Queries
    21.
    发明申请
    Leveraging Structured XML Index Data For Evaluating Database Queries 审中-公开
    利用结构化XML索引数据来评估数据库查询

    公开(公告)号:US20150039642A1

    公开(公告)日:2015-02-05

    申请号:US14513176

    申请日:2014-10-13

    CPC classification number: G06F17/30932 G06F17/30935

    Abstract: A query may be rewritten to leverage information stored in a structured XML index. An operator in the query may be analyzed to determine an input source database object for the operator by traversing an operator tree rooted at the operator. The path expressions associated with the operator tree may be fused together to form an effective path expression for the operator. If the effective path expression directly matches a path expression derived from the index, the query may be rewritten using references to the index. Operators in a query that have effective paths that refer to data in the same index table may be grouped together. A single subquery may be written for a group of operators. Also, a structured XML index may be used as an implied schema for indexed XML data. This implied schema may be used to optimize queries that refer to the indexed XML data.

    Abstract translation: 可以重写查询以利用存储在结构化XML索引中的信息。 可以分析查询中的运算符以通过遍历运算符的操作符树来确定运算符的输入源数据库对象。 与运算符树相关联的路径表达式可以被融合在一起以形成操作者的有效路径表达式。 如果有效路径表达式直接匹配从索引导出的路径表达式,则可以使用对索引的引用来重写查询。 具有指向相同索引表中的数据的有效路径的查询中的运算符可以被分组在一起。 可以为一组运营商编写单个子查询。 此外,结构化XML索引可以用作索引XML数据的隐含模式。 此隐含模式可用于优化引用索引XML数据的查询。

    Evaluating XML Full Text Search
    22.
    发明申请
    Evaluating XML Full Text Search 审中-公开
    评估XML全文检索

    公开(公告)号:US20140095519A1

    公开(公告)日:2014-04-03

    申请号:US13783141

    申请日:2013-03-01

    CPC classification number: G06F16/8373

    Abstract: Processes, machines, and stored instructions are provided for storing posting lists for tokens in XML documents and using the posting lists to process queries. For each occurrence of a token in the XML documents, a document processor adds an entry to a list for the token. The entry for the token maps the token to documents or nodes within the documents where the tokens can be found. The document processor may also detect tags in the XML documents and, for each occurrence of a tag, add an entry to a list for the tag. The entry for the tag specifies a range of locations covered by the tag. A query processor may then receive a full text query for evaluation against XML documents, and the query processor may determine a result set for the query using the lists for the tokens and/or the lists for the tags.

    Abstract translation: 提供过程,机器和存储的指令用于存储XML文档中的令牌的发布列表,并使用发布列表来处理查询。 对于XML文档中每个出现的令牌,文档处理器将一个条目添加到令牌的列表中。 令牌的条目将令牌映射到可以找到令牌的文档中的文档或节点。 文档处理器还可以检测XML文档中的标签,并且对于标签的每次出现,向标签的列表中添加条目。 标签的条目指定标记覆盖的位置范围。 查询处理器然后可以接收用于针对XML文档的评估的全文查询,并且查询处理器可以使用标记的列表和/或标签的列表来确定查询的结果集。

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