Re: ALTER TABLE ... ALTER COLUMN ... SET DISTINCT

There wasn't any response to this comment:

marcin mank <marcin.mank@gmail.com> writes:
> ALTER COLUMN SET DISTINCT
> feels like adding a unique constraint.

> ALTER COLUMN SET STATISTICS DISTINCT ?
> ALTER COLUMN SET STATISTICS NDISTINCT ?

I don't want to add a new keyword, but "SET STATISTICS DISTINCT" would
be an easy change.  Comments?
        regards, tom lane