Invention Grant
- Patent Title: Techniques for scoring and comparing query execution plans
- Patent Title (中): 评估和比较查询执行计划的技术
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Application No.: US11782824Application Date: 2007-07-25
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Publication No.: US07941425B2Publication Date: 2011-05-10
- Inventor: Birendra Kumar Sahu , Deva Raju Kvm
- Applicant: Birendra Kumar Sahu , Deva Raju Kvm
- Applicant Address: US OH Dayton
- Assignee: Teradata US, Inc.
- Current Assignee: Teradata US, Inc.
- Current Assignee Address: US OH Dayton
- Agency: Schwegman, Lundberg & Woessner
- Main IPC: G06F7/00
- IPC: G06F7/00 ; G06F17/30

Abstract:
Techniques for scoring and comparing query execution plans are provided. Predefined parameter types are identified in query execution plans and predefined weighted values are assigned to any identified parameters within the query execution plans. The weights are summed on a per processing step bases and the sum of the processing steps represents a total score for a particular query execution plan. The total scores or individual step scores from different query execution plans can then be compared or evaluated against one another for optimization and problem detection analysis.
Public/Granted literature
- US20090030888A1 TECHNIQUES FOR SCORING AND COMPARING QUERY EXECUTION PLANS Public/Granted day:2009-01-29
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