Re: general purpose array_sort

On Fri, Sep 27, 2024 at 9:15 PM Junwang Zhao <zhjwpku(at)gmail(dot)com> wrote:
>
> Hi hackers,
>
> per David's suggestion, this patch implements general
> purpose array sort.
>
> We can do the following with this patch:
>
> SELECT array_sort('{1.1,3.3,5.5,2.2,4.4,6.6}'::float8[], 'asc');
> SELECT array_sort('{abc DEF 123abc,ábc sßs ßss DÉF,DŽxxDŽ džxxDž
> Džxxdž,ȺȺȺ,ⱥⱥⱥ,ⱥȺ}'::text[]);
> SELECT array_sort('{abc DEF 123abc,ábc sßs ßss DÉF,DŽxxDŽ džxxDž
> Džxxdž,ȺȺȺ,ⱥⱥⱥ,ⱥȺ}'::text[], 'asc', 'pg_c_utf8');
>
> --
> Regards
> Junwang Zhao

PFA v2, use COLLATE keyword to supply the collation suggested by
Andreas offlist.

SELECT array_sort('{abc DEF 123abc,ábc sßs ßss DÉF,DŽxxDŽ džxxDž
Džxxdž,ȺȺȺ,ⱥⱥⱥ,ⱥȺ}'::text[]);
SELECT array_sort('{abc DEF 123abc,ábc sßs ßss DÉF,DŽxxDŽ džxxDž
Džxxdž,ȺȺȺ,ⱥⱥⱥ,ⱥȺ}'::text[] COLLATE "pg_c_utf8");

I also created a CF entry[1] so it can be easily reviewed.

[1]: https://commitfest.postgresql.org/50/5277/

--
Regards
Junwang Zhao