Re: Assert failure on 'list_member_ptr(rel->joininfo, restrictinfo)' - Mailing list pgsql-hackers

On Mon, Nov 27, 2023 at 8:07 PM Andres Freund <andres@anarazel.de> wrote:
>
> On 2023-11-27 11:29:48 +0530, Ashutosh Bapat wrote:
> > How do we ensure that we are not making unnecessary copies of Bitmapsets?
>
> We don't - but that's not specific to this patch. Bitmapsets typically aren't
> very large, I doubt that it's a significant proportion of the memory
> usage. Adding refcounts or such would likely add more overhead than it'd save,
> both in time and memory.
>
> I am a bit worried about the maintainability of remove_rel_from_query() et
> al. Is there any infrastructure for detecting that some PlannerInfo field that
> needs updating wasn't updated?  There's not even a note in PlannerInfo that
> documents that that needs to happen.

That makes sense, thank you.  We need at least a comment about this.
I'll write a patch adding this comment.

BTW, what do you think about the patches upthread [1].

Links
1. https://www.postgresql.org/message-id/CAPpHfdtLgCryACcrmLv=Koq9rAB3=tr5y9D84dGgvUhSCvjzjg@mail.gmail.com

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Regards,
Alexander Korotkov