发明名称 |
Automatic database statistics creation |
摘要 |
A system for automatic statistics creation comprises a query optimizer which automatically generates statistics derived from data in a database and selects an executable procedure from a plurality of procedures that operate on data in a database using the automatically generated statistics. A counter is maintained of updates made to each statistic that has been automatically generated. If the counter breaches a threshold, the automatically generated statistic is removed from the database.
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申请公布号 |
US2005108199(A1) |
申请公布日期 |
2005.05.19 |
申请号 |
US20040981799 |
申请日期 |
2004.11.05 |
申请人 |
MICROSOFT CORPORATION |
发明人 |
ELLIS NIGEL R.;KLINE RODGER N. |
分类号 |
G06F17/30;(IPC1-7):G06F7/00 |
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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