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
