Data base locking
    1.
    发明授权
    Data base locking 失效
    数据库锁定

    公开(公告)号:US4698752A

    公开(公告)日:1987-10-06

    申请号:US858085

    申请日:1986-04-29

    IPC分类号: G06F9/46 G06F17/30 G06F15/40

    摘要: A data base system is disclosed in which records are locked out during record changing by using a dynamically generated directed acyclic graph of the records. The edges of the graph, stored in the records themselves, point toward a "root" record representing multiply-shared information. An application to the assignment of telephone facilities to telephone subscribers is also described. A transaction list is maintained to identify locked out records previously locked out during the same transaction.

    摘要翻译: 公开了一种数据库系统,其中通过使用动态生成的记录的有向非循环图来在记录更改期间锁定记录。 存储在记录本身中的图形的边缘指向表示多重共享信息的“根”记录。 还描述了将电话设备分配给电话用户的应用。 维护一个事务列表以识别先前在同一个事务中被锁定的锁定的记录。

    Hyperedge entity-relationship data base systems
    2.
    发明授权
    Hyperedge entity-relationship data base systems 失效
    超实体实体关系数据库系统

    公开(公告)号:US4479196A

    公开(公告)日:1984-10-23

    申请号:US441730

    申请日:1982-11-15

    IPC分类号: G06F17/30 H04Q3/47 G06F15/40

    CPC分类号: G06F17/30604 H04Q3/47

    摘要: A data base management system is disclosed in which data entities are records representing nodes in an entity-relationship directed graph. The body of each node represents one of the physical entities to be utilized while the edges of each node represent relationships between that physical entity and other physical entities. Some of the edges are hyperedges to permit the identification of simultaneous relationships with more than one other node. An application of this system to the assignment of telephone outside plant equipment to telephone subscribers is also described.

    摘要翻译: 公开了一种数据库管理系统,其中数据实体是表示实体关系有向图中的节点的记录。 每个节点的主体表示要使用的物理实体之一,而每个节点的边缘表示该物理实体和其他物理实体之间的关系。 边缘中的一些是超出的,以允许识别与多于另一个节点的同时关系。 还描述了该系统将电话机外部设备电话分配给电话用户的应用。