On 11/19/20 1:54 AM, Chapman Flack wrote:
> On 11/18/20 19:46, David G. Johnston wrote:
>
>> I doubt there is any substantial resistance to including such a function
>> but it would have to be written in C.
>
> Would anything have to be written at all, save the CREATE AGGREGATE
> suggested in the original message, using the existing array_cat as the
> state transition function?
Nope. As my example showed.
One could imagine extending it with an inverse transition function for
use in windows (small w) but that's about it.
--
Vik Fearing