Re: general purpose array_sort

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От David G. Johnston
Тема Re: general purpose array_sort
Дата
Msg-id CAKFQuwYTorYsxiOW0Mh7oS-bqrGt9RCibPfw7K=on21Cj9EckA@mail.gmail.com
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Ответ на Re: general purpose array_sort  (Aleksander Alekseev <aleksander@timescale.com>)
Ответы Re: general purpose array_sort
Список pgsql-hackers
On Thu, Oct 24, 2024 at 7:58 AM Aleksander Alekseev <aleksander@timescale.com> wrote:
Hi,

> It's hardly "general purpose" if it randomly refuses to
> sort certain types.  I would say it should be able to sort
> anything that ORDER BY will handle --- and that certainly
> includes the cases shown here.

I wonder how useful / convenient the new function will be considering
that we already have CTEs and can do:

SELECT array_agg(x ORDER BY x) FROM unnest(ARRAY[5,1,3,2,4]) AS x;

Perhaps there are use cases I didn't consider?


Succinctness of expression.  Plus I'm under the impression that a function doing this is going to be somewhat faster than composing two functions together within a multi-node subtree.

I feel like the same observation could have been made for array_shuffle but we added that.  This function being added feels to me like just completing the set.

David J.

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