发明名称 |
Estimating the compilation time of a query optimizer |
摘要 |
A compilation time estimator provides a quantified estimate of the optimizer compilation time for a given query optimizer. The estimator automates the optimizer to choose the right level of optimization in commercial database systems. The estimator reuses an optimizer's join enumerator to obtain actual number of joins, but bypasses plan generation to save estimation overhead, and maintains a small number of interesting physical properties to estimate the number of plans by using a linear regression model. The estimator uses the number of generated plans to estimate query compilation time.
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申请公布号 |
US2005071331(A1) |
申请公布日期 |
2005.03.31 |
申请号 |
US20030673433 |
申请日期 |
2003.09.30 |
申请人 |
GAO DENGFENG;ILYAS IHAB F.;LIN EILEEN TIEN;LOHMAN GUY MARING;RAO JUN |
发明人 |
GAO DENGFENG;ILYAS IHAB F.;LIN EILEEN TIEN;LOHMAN GUY MARING;RAO JUN |
分类号 |
G06F17/30;(IPC1-7):G06F17/30 |
主分类号 |
G06F17/30 |
代理机构 |
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