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Predictable query execution through early materialization
Predictable query execution through early materialization
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机译:通过尽早实现实现可预测的查询执行
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摘要
A method for predictable query execution through early materialization is provided. The method deals with the problem of cardinality misestimation in query execution plans, by pre-executing sub-plans on a query execution plan that have questionable estimates and collecting statistics on the output of these sub-plans. If needed, the overall query execution plan is changed in light of these statistics, before optimizing and executing the remainder of the query.
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