On Fri, Feb 5, 2010 at 8:53 PM, Bruce Momjian wrote:
> Do you want a C comment to document this problem?
Well I would rather a better heuristic :)
We really need some statistics nerds in this group who can pipe up
when these kinds of issues come up. There must be a good way to
estimate the proba
Greg Stark wrote:
> So I never realized the consequences of this little heuristic in
> analyze.c in the handling of very low cardinality columns where we
> want to just capture the complete list of values in the mcv and throw
> away the histogram:
>
> else if (toowide_cnt == 0 && nmu
So I never realized the consequences of this little heuristic in
analyze.c in the handling of very low cardinality columns where we
want to just capture the complete list of values in the mcv and throw
away the histogram:
else if (toowide_cnt == 0 && nmultiple == ndistinct)
