发明名称 |
A SYSTEM FOR RELATIONS RECOVERY OF A DATA BASE IN CASE OF ERRORS. |
摘要 |
A system for recovery of relations in a data base in case of errors, comprises functionality executed by a computer and ensuring that data in the data base are structured as items of data in a number of recovery sub-systems, each item of data belonging to only one sub-system. If a sub-system contains one or more items of data that depend on one or more items of data in another sub-system, the first mentioned sub-system is marked as depending on the second mentioned sub-system. If a first sub-system is marked as depending on a second sub-system which is marked as depending on a third sub-system, the first sub-system is recursively marked as depending on the third sub-system. Furthermore no two sub-systems are marked as depending on each other. Integrity constraints between an item of data in one sub-system and an item of data in another sub-system are admitted provided that one of these sub-systems is marked as depending on the other one. Recovery actions are performed on a sub-system so as to only result in changing items of data of that sub-system and of sub-systems marked as depending on it. |
申请公布号 |
EP0673529(A1) |
申请公布日期 |
1995.09.27 |
申请号 |
EP19940902167 |
申请日期 |
1993.12.03 |
申请人 |
TELEFONAKTIEBOLAGET L M ERICSSON |
发明人 |
LARSSON, BO, ERIK, STEFAN;SANCHEZ IVAN, MARIA;SINTORN, JOHAN, HED |
分类号 |
G06F12/00;G06F11/14;G06F17/30;(IPC1-7):G06F15/40 |
主分类号 |
G06F12/00 |
代理机构 |
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代理人 |
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主权项 |
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地址 |
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