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公开(公告)号:US5758337A
公开(公告)日:1998-05-26
申请号:US689352
申请日:1996-08-08
申请人: Bradley Mark Hammond
发明人: Bradley Mark Hammond
IPC分类号: G06F17/30
CPC分类号: G06F17/30371 , Y10S707/99933 , Y10S707/99936
摘要: A system for creating database partial replicas is provided where the referential integrity of the original database is maintained in the partial replica. Filters are specified to allow a user to select, using boolean logic, which rows of the original database are to be propagated to the partial replica. A row containing the primary key corresponding to a foreign key of a row propagated to the partial replica is also propagated to the partial replica. Also, a filter may be specified to include rows that are part of a relationship between multiple record sources. The result is a partial replica database containing only those records desired by the user but also all the records necessary to maintain the referential integrity of the original database.
摘要翻译: 提供了一种用于创建数据库部分副本的系统,其中原始数据库的引用完整性保留在部分副本中。 过滤器被指定为允许用户使用布尔逻辑来选择将原始数据库的哪些行传播到部分副本。 包含对应于传播到部分副本的行的外键的主键的行也被传播到部分副本。 此外,可以指定过滤器以包括作为多个记录源之间的关系的一部分的行。 结果是仅包含用户期望的那些记录的部分副本数据库,还包括维护原始数据库的参照完整性所需的所有记录。