发明名称 |
SYSTEM, METHOD, AND COMPUTER-READABLE MEDIUM FOR COSTING USER-DEFINED FUNCTIONS AND METHODS IN A DATABASE MANAGEMENT SYSTEM |
摘要 |
A system, method, and computer-readable medium for the calculation of execution time estimates of user defined functions/user defined methods are provided. The execution of a UDF or UDM is timed several times at the time of the UDF/UDM creation, and an average execution time of the UDF/UDM is obtained. The resulting average execution time is then stored in a data dictionary where the optimizer may consult this value to factor it into the cost of execution of a query.
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申请公布号 |
US2010121863(A1) |
申请公布日期 |
2010.05.13 |
申请号 |
US20080269085 |
申请日期 |
2008.11.12 |
申请人 |
REED MICHAEL;BREALEY ELIZABETH;VIRGIL KEVIN |
发明人 |
REED MICHAEL;BREALEY ELIZABETH;VIRGIL KEVIN |
分类号 |
G06F17/30 |
主分类号 |
G06F17/30 |
代理机构 |
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主权项 |
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