发明授权
US07877381B2 Progressive refinement of a federated query plan during query execution
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查询执行期间联合查询计划的逐步细化
- 专利标题： Progressive refinement of a federated query plan during query execution
- 专利标题（中）： 查询执行期间联合查询计划的逐步细化
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申请号： US11389596申请日： 2006-03-24
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公开(公告)号： US07877381B2公开(公告)日： 2011-01-25
- 发明人: Stephan Eberhard Ewen , Holger Kache , Volker Gerhard Markl , Vijayshankar Raman
- 申请人： Stephan Eberhard Ewen , Holger Kache , Volker Gerhard Markl , Vijayshankar Raman
- 申请人地址： US NY Armonk
- 专利权人： International Business Machines Corporation
- 当前专利权人： International Business Machines Corporation
- 当前专利权人地址： US NY Armonk
- 代理机构： Yee & Associates, P.C.
- 代理商 Doug H. Lefeve
- 主分类号： G06F7/00
- IPC分类号： G06F7/00 ; G06F17/00
摘要：
A way for progressively refining a query execution plan during query execution in a federated data system is provided. Re-optimization constraints are placed in the query execution plan during query compilation. When a re-optimization constraint is violated during query execution, a model of the query execution plan is refined using a partially executed query to form a new query execution plan. The new query execution plan is compiled. The compiled new query execution plan is executed.
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