发明名称 |
Closed-loop predicate analysis |
摘要 |
A method, computer system, and database system for optimizing processing of a request are disclosed. The request has one or more predicates. A list of the one or more predicates in the request is created and predicates for which an actual cost has not been stored or for which a cost cannot be estimated are pruned from the list. An access path for the each of the predicates is selected. The request is processed using the selected access paths producing one or more actual predicate costs. The one or more actual predicate costs are stored.
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申请公布号 |
US2007162426(A1) |
申请公布日期 |
2007.07.12 |
申请号 |
US20060328702 |
申请日期 |
2006.01.10 |
申请人 |
BROWN DOUGLAS P;RICHARDS ANITA;RAMESH BHASHYAM |
发明人 |
BROWN DOUGLAS P.;RICHARDS ANITA;RAMESH BHASHYAM |
分类号 |
G06F17/30;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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