On 10/31/19 8:32 PM, Tomas Vondra wrote: > IMO having some sort of CDF approximation (being a q-digest or t-digest) > would be useful, although it'd probably need to be optional (mostly > becuase of memory consumption).
+1, I like this idea. If we are afraid of CPU cost we could imagine some kind of sampling or add the possibility to collect only for a specific queryid. I dreamed of this kind of feature for PoWA. Thus, it could make possible to compare CDF between two days for example, before and after introducing a change. Regards, -- Adrien NAYRAT
