Thread: Re: Prevent COPY FREEZE on Foreign tables

Re: Prevent COPY FREEZE on Foreign tables

From
Sami Imseih
Date:
my apologies for the top post in the last reply. I hit send too fast :)

I also created a CF entry for this https://commitfest.postgresql.org/52/5544/

I don't think we will need to backpatch, unless someone has a different
opinion about this.

Regards,

Sami



Re: Prevent COPY FREEZE on Foreign tables

From
Nathan Bossart
Date:
On Wed, Feb 05, 2025 at 01:11:44PM -0600, Sami Imseih wrote:
> I don't think we will need to backpatch, unless someone has a different
> opinion about this.

I think this falls into the category of a bug, so the only reason I can see
for not back-patching it is that it could lead to somewhat widespread
breakage for existing scripts, etc. which are arguably kind-of working
today.  That seems unlikely, but it'd be good to hear some other opinions
on the matter.

-- 
nathan



Re: Prevent COPY FREEZE on Foreign tables

From
Sami Imseih
Date:
> so the only reason I can see
> for not back-patching it is that it could lead to somewhat widespread
> breakage for existing scripts, etc. which are arguably kind-of working
> today.

That is my thought for not backpatching. It's not breaking the COPY
command, it's just not applying an optimization.

Let's see what others think.

Sami



Re: Prevent COPY FREEZE on Foreign tables

From
Nathan Bossart
Date:
On Wed, Feb 05, 2025 at 01:36:57PM -0600, Sami Imseih wrote:
>> so the only reason I can see
>> for not back-patching it is that it could lead to somewhat widespread
>> breakage for existing scripts, etc. which are arguably kind-of working
>> today.
> 
> That is my thought for not backpatching. It's not breaking the COPY
> command, it's just not applying an optimization.
> 
> Let's see what others think.

Given we don't have any other reports or opinions, I'm probably just going
to apply the patch to v18.  That leaves the door open to back-patch later.
The next minor release is next week, anyway, and this doesn't seem urgent.

I did find one other thread that mentions this behavior [0].  They floated
the idea of blocking COPY FREEZE on foreign tables, but the topic fizzled
out in indecision.  *shrug*

[0] https://postgr.es/m/20181219023814.GA6577%40paquier.xyz

-- 
nathan



Re: Prevent COPY FREEZE on Foreign tables

From
Sami Imseih
Date:
> Given we don't have any other reports or opinions, I'm probably just going
> to apply the patch to v18.

That makes sense. Thanks!

Sami



Re: Prevent COPY FREEZE on Foreign tables

From
Nathan Bossart
Date:
On Thu, Feb 06, 2025 at 10:26:09AM -0600, Sami Imseih wrote:
> That makes sense. Thanks!

Committed.

-- 
nathan