Hi folks. Thomas, I'm trying understand the h2 cost model and I'm having some doubts. Why do you multiply the costs to the level tree nodes? How you choosed the coeficients of item access type (index and so on)? Is there any specific documentation to the cost model? How do you choosed this cost model, have you based in another model? Do you have some plan to add other join methods or include CPU cost in the model? Do you use histogram to make some predictions?
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