On Fri, 28 Jan 2005 10:53:33 -0500, Tom Lane <tgl(at)sss(dot)pgh(dot)pa(dot)us> wrote:
> we should consider
>something like "clamp to size of table / 10" instead.
... unless a *single* grouping column is estimated to have more than
N/10 distinct values, which should be easy to check.
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