Access path selection: What did DB2 decide, and why?

选择访问路径：DB 2做出什么决策？为什么？

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One solution is to funnel all the access to widgets/selection objects through the window.

一种解决方案是让所有对窗口小部件／选择对象的访问都经过窗口。

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Insufficient or inaccurate statistics lead to inaccurate cost estimates for the candidate access paths and is the most common reason for the selection of inefficient access paths.

不充分或不准确的统计数据会导致对候选访问路径评估不准确，这也是选择低效访问路径的最常见原因。

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