On Sat, 22 Jun 2019 at 15:10, Tomas Vondra <tomas.von...@2ndquadrant.com> wrote: > One annoying thing I noticed is that the base_frequency tends to end up > being 0, most likely due to getting too small. It's a bit strange, though, > because with statistic target set to 10k the smallest frequency for a > single column is 1/3e6, so for 2 columns it'd be ~1/9e12 (which I think is > something the float8 can represent). >
Yeah, it should be impossible for the base frequency to underflow to 0. However, it looks like the problem is with mcv_list_items()'s use of %f to convert to text, which is pretty ugly. Regards, Dean
