Re: Add counted_by attribute

From: Peter Eisentraut <peter(at)eisentraut(dot)org>
To: Tristan Partin <tristan(at)partin(dot)io>
Cc: pgsql-hackers <pgsql-hackers(at)postgresql(dot)org>, Japin Li <japinli(at)hotmail(dot)com>
Subject: Re: Add counted_by attribute
Date: 2026-11-02 10:49:18
Message-ID: d160efd8-bb83-49b6-899f-70e6bd7c8c47@eisentraut.org
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On 06.10.26 22:41, Tristan Partin wrote:
> On Mon Oct 5, 2026 at 7:52 PM UTC, Peter Eisentraut wrote:
>> Ok, all the infrastructure is in place now. I'm working through the
>> attribute additions now.
>>
>> One thing to think about is that adding these attributes to server
>> header files would also affect extensions. I think we might want to do
>> some research about that. Like, is the normal API to fill in the
>> structure yourself, or are there wrapper functions that are mandatory to
>> use? I'm going to park that for the moment and work through the
>> attribute additions in .c files first.
>
> I have to think that extensions testing with
> -fsanitize=bounds/_FORTIFY_SOURCE=3 is pretty rare. In any case, I did
> some analysis (grepping and reading) on the list of structs exposed in
> header files against 9 popular extensions (not in contrib), and I didn't
> find any potential issues.

Ok, I studies this a bit, too, and I think it's ok. I have committed
the rest of this, and added a note in the commit message about this.

I added an annotation to SharedMaterialInfo, which was added to
executor/instrument_node.h concurrently and fit with the pattern of the
other changes.

I dropped the annotation for BackendParameters. The way this type is
used as a local variable seems kind of a weird fit for this attribute.
I'm not sure.

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