发明名称 |
Fast refresh of snapshots |
摘要 |
A method and apparatus employs primary key values stored in a master table to drive a fast refresh mechanism for a snapshot defined on the master table. A primary key is a set of columns in the master table having a combined value that uniquely identifies each row in the master table. When rows of the master table are modified, the primary key values of the modified rows are recorded in a master log. In response to a fresh command, differences between the master table and snapshot are reconciled based on primary key values stored in the master table, the master log, and the snapshot.
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申请公布号 |
US5963959(A) |
申请公布日期 |
1999.10.05 |
申请号 |
US19970865645 |
申请日期 |
1997.05.30 |
申请人 |
ORACLE CORPORATION |
发明人 |
SUN, HARRY;DOWNING, ALAN;SOUDER, BENNY |
分类号 |
G06F17/30;(IPC1-7):G06F17/30 |
主分类号 |
G06F17/30 |
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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