Garamda commented on issue #12824:
URL: https://github.com/apache/datafusion/issues/12824#issuecomment-2401659938
I see. So there are 3 sub tasks, I think.
1. fix the syntax of `approx_percentile_cont` and
`approx_percentile_cont_with_weight` to support `WITHIN GROUP` (#11732)
2. fix the same functions to support `ORDER BY sort_expression`
3. After finishing step 1 & 2, implement new functions below (since `WITHIN
GROUP` & `ORDER BY` will be reused)
- mode() WITHIN GROUP (ORDER BY sort_expression)
- percentile_cont(fraction) WITHIN GROUP (ORDER BY sort_expression)
- percentile_cont(fractions) WITHIN GROUP (ORDER BY sort_expression)
- percentile_disc(fraction) WITHIN GROUP (ORDER BY sort_expression)
- percentile_disc(fractions) WITHIN GROUP (ORDER BY sort_expression)
If there is nothing that I missed, I can start from step 1.
So I think I can make a `take` comment on #11732 and get assigned, right?
(or if you want to reorganize sub tasks and make new issues for each one
since it was changed into `EPIC`, I can wait.)
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