Re: range_agg

On Mon, Jul 1, 2019 at 3:38 PM Jeff Davis <pgsql@j-davis.com> wrote:
>
> The patch is implicitly introducing the concept of
> a "multirange" (in this case, an array of ranges),

I meant to say before: this patch always returns a sorted array, and I
think a multirange should always act as if sorted when we stringify it
or cast it to an array. If you disagree let me know. :-)

You could imagine that when returning arrays we rely on the caller to
do the sorting (range_agg(r ORDER BY r)) and otherwise give wrong
results. But hopefully everyone agrees that would not be nice. :-) So
even the array-returning version should always return a sorted array I
think. (I'm not sure anything else is really coherent or at least easy
to describe.)

Paul