Linked databases
    3.
    发明授权
    Linked databases 有权
    链接数据库

    公开(公告)号:US09183267B2

    公开(公告)日:2015-11-10

    申请号:US12785502

    申请日:2010-05-24

    IPC分类号: G06F17/30

    CPC分类号: G06F17/30575

    摘要: Several local databases may be linked together to form a large database. Each database may share a common type definition, but may contain only a portion of the large database. When a local database queries information from another database, the result may be stored locally using the type system. Across the entire database, items may be identified as their local or home database along with an identifier provided by that database. Cached information may be stored locally and may refer to the source for that information through the identifier. Once the cached information is present, queries that reference the record may be satisfied by the cached information. The cached information may be refreshed from the source database or may expire to avoid stale or changed data in the cache.

    摘要翻译: 几个本地数据库可以链接在一起以形成大型数据库。 每个数据库可以共享公共类型定义,但可以仅包含大型数据库的一部分。 当本地数据库从另一个数据库查询信息时,结果可能会使用类型系统本地存储。 在整个数据库中,项目可以被标识为它们的本地或家庭数据库以及由该数据库提供的标识符。 缓存信息可以在本地存储,并且可以通过标识符来引用该信息的来源。 一旦存在缓存的信息,引用该记录的查询可能被缓存的信息所满足。 缓存的信息可能会从源数据库刷新,或者可能会过期,以避免缓存中的陈旧或更改的数据。