Re: Todo item: distinct clause - guidance

On Sun, 2022-11-06 at 18:39 +0530, Ankit Kumar Pandey wrote:
> I was looking for some to-do item to pick up and came across 'Implement DISTINCT
> clause in window aggregates'. Can someone pleaseelaborate what is expectation here?
> Do feature request still exists as DISTINCT worked as expected if we try functions
> like avg(distinct col)?

Whis is about window functions, like

  WITH q(a,b) AS (VALUES (1, 1), (1, 1), (2, 1))
  SELECT *,
         count(DISTINCT a) OVER (PARTITION BY b)
  FROM q;

  ERROR:  DISTINCT is not implemented for window functions
  LINE 3:        count(DISTINCT a) OVER (PARTITION BY b)
                 ^

Yours,
Laurenz Albe