We've talked about ideas along those lines. However, rather than altering the plan mid-query, we'd be more likely to have some kind of feedback mechanism that c

We've talked about ideas along those lines. However, rather than altering the plan mid-query, we'd be more likely to have some kind of feedback mechanism that corrects estimates for the benefit of future plans. Another commenter posted an interesting paper that's related to your question: https://www.microsoft.com/en-us/research/uploads/prod/2018/07/p1123-ding.pdf https://www.microsoft.com/en-us/research/uploads/prod/2018/0...