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Include option to always report access path changes.
Reporting access path changes should be independent of cost filtering. Some access paths can be detrimental even if little to no cost change is reported by an explain. For instance, the move to a hybrid join from a nested loop join can cause detrimental slow downs, even if an explain does not show a cost increase, or even a cost decrease. You should be able to specify that you want to see any path changes, regardless of cost. So ideally, you should be able to specify that you want to see any access path changes, plus any cost increases above a threshold you specify, regardless of whether or not there is a path change. You should also be able to say list all path changes only, and ignore all cost changes.
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