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    • 4. 发明申请
    • Method and system for supporting structured aggregation operations on semi-structured data
    • 支持半结构化数据结构化聚合操作的方法和系统
    • US20060161525A1
    • 2006-07-20
    • US11037640
    • 2005-01-18
    • Rajesh BordawakarChristian Lang
    • Rajesh BordawakarChristian Lang
    • G06F17/30
    • G06F16/83
    • The introduction of extensions to query processing systems for XML documents that allow the analysis of such documents via grouping and aggregation operations. Assumed is the existence of an analysis module for extracting information on how parts of an XML document interrelate with other parts. This information is then used together with a user query in order (1) to partition the nodes of the document in various ways and (2) to compute and output the aggregation value of each such partition. To these ends, there are provided new query operators and extensions to query processing systems comprising a hierarchical node list generator and a hierarchical node list processor. The former takes the grouping information from the query as input and generates document node partitionings. The latter takes the node partitionings as input and computes aggregation values for each partition and generates a query result that is returned to the user.
    • 对XML文档的查询处理系统引入扩展,允许通过分组和聚合操作分析这些文档。 假设存在一个分析模块,用于提取关于XML文档的部分如何与其他部分相关的信息。 然后,该信息与用户查询按顺序(1)一起以各种方式对文档的节点进行分区,以及(2)计算并输出每个这样的分区的聚合值。 为此,提供了新的查询运算符和对包括分层节点列表生成器和分层节点列表处理器的查询处理系统的扩展。 前者将查询中的分组信息作为输入,并生成文档节点分区。 后者将节点分区作为输入,并计算每个分区的聚合值,并生成返回给用户的查询结果。