首页>
外国专利>
Mechanism to efficiently index structured data that provides hierarchical access in a relational database system
Mechanism to efficiently index structured data that provides hierarchical access in a relational database system
展开▼
机译:有效索引结构化数据的机制,该结构化数据在关系数据库系统中提供分层访问
展开▼
页面导航
摘要
著录项
相似文献
摘要
Described is a hierarchical index that captures the hierarchical relationship of a hierarchy emulated by a relational database system. The hierarchical index is implemented, using a database table which contains rows that serve as entries of the hierarchical index. Another table has rows that are associated with nodes in the hierarchy. Each entry in the hierarchal index maps to a row that corresponds to a node in the hierarchy. A node in the hierarchy may be a parent node with one or more child nodes. In this case, the corresponding entry in the hierarchical index contains identifiers which identify other entries in the index, where the other entries correspond to rows associated with child nodes of the parent node.
展开▼