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 functionnality 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 a third sub-system. If a first sub-system is marked as depending on said second sub-system which is marked as depending on a third sub-system, said first sub-system is recursively marked as depending on said third sub-system. Furthermore no two subsystems 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 is 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 |
CA2151255(A1) |
申请公布日期 |
1994.06.23 |
申请号 |
CA19932151255 |
申请日期 |
1993.12.03 |
申请人 |
TELEFONAKTIEBOLAGET LM 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):G06F11/08 |
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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