Re: GROUP BY DISTINCT
Vik Fearing <vik@postgresfriends.org>
From: Vik Fearing <vik@postgresfriends.org>
To: Georgios Kokolatos <gkokolatos@protonmail.com>,
pgsql-hackers@lists.postgresql.org
Cc: Erik Rijkers <er@xs4all.nl>
Date: 2021-03-02T16:51:52Z
Lists: pgsql-hackers, pgsql-docs
Attachments
- 0001-implement-GROUP-BY-DISTINCT.v03.patch (text/x-patch)
On 3/2/21 4:06 PM, Georgios Kokolatos wrote: > As a minor gripe, I would note the addition of list_int_cmp. > The block > > + /* Sort each groupset individually */ > + foreach(cell, result) > + list_sort(lfirst(cell), list_int_cmp); > > Can follow suit from the rest of the code, and define a static cmp_list_int_asc(), as > indeed the same patch does for cmp_list_len_contents_asc. > This is indeed point of which I will not hold a too strong opinion. I did it this way because list_int_cmp is a general purpose function for int lists that can be reused elsewhere in the future. Whereas cmp_list_len_contents_asc is very specific to this case so I kept it local. I'm happy to change it around if that's what consensus wants. > Overall :+1: from me. Thanks for looking at it! > I will be bumping to 'Ready for Committer' unless objections. In that case, here is another patch that fixes a typo in the docs mentioned privately to me by Erik. The typo (and a gratuitous rebase) is the only change to what you just reviewed. -- Vik Fearing
Commits
-
Use lfirst_int in cmp_list_len_contents_asc
- b822ae13ea93 14.0 landed
-
Fix misuse of foreach_delete_current().
- 1d581ce7129d 14.0 landed
-
Implement GROUP BY DISTINCT
- be45be9c33a8 14.0 landed