Re: intarray sort returns wrong result - Mailing list pgsql-hackers

From Junwang Zhao
Subject Re: intarray sort returns wrong result
Date
Msg-id CAEG8a3+Uf97p9rcaPhJGbVRZKqn1k8gOpiFkS_LcgL3-AJ1kfQ@mail.gmail.com
Whole thread Raw
In response to Re: intarray sort returns wrong result  (Tom Lane <tgl@sss.pgh.pa.us>)
List pgsql-hackers
On Tue, Nov 12, 2024 at 9:13 AM Tom Lane <tgl@sss.pgh.pa.us> wrote:
>
> Junwang Zhao <zhjwpku@gmail.com> writes:
> > While working on general array sort[1], I played with intarray
> > extension, found a bug (or at least inconsistency) when sorting
> > multidimensional int array:
>
> > create extension intarray;
> > select sort('{{1,2,3}, {2,3,4}}');
>
> > this returns {{1,2,2},{3,3,4}} instead of {{1,2,3},{2,3,4}}
>
> This is documented, isn't it?
>
>     Many of these operations are only sensible for one-dimensional
>     arrays. Although they will accept input arrays of more dimensions,
>     the data is treated as though it were a linear array in storage
>     order.
>

I did not notice this statement, my bad 😞

> I don't think anyone will thank us for changing intarray's behavior
> many years after the fact.
>

Agreed. Sorry for the noise.

>                         regards, tom lane



--
Regards
Junwang Zhao



pgsql-hackers by date:

Previous
From: Tom Lane
Date:
Subject: Re: intarray sort returns wrong result
Next
From: Peter Smith
Date:
Subject: Re: Skip collecting decoded changes of already-aborted transactions