Manfred Koizar <mkoi-pg@aon.at> writes:
> That's not what I meant. I tried to say that if we have a GROUP BY
> several columns and one of these columns alone has more than N/10
> distinct values, there's no way to get less than that many groups.
Oh, I see, you want a "max" calculation in there too. Seems reasonable.
Any objections?
regards, tom lane
