intarray sort returns wrong result

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

regards, tom lane

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