Re: Add bms_offset_members() function for bitshifting Bitmapsets

On Wed, 15 Apr 2026 at 14:33, David Rowley <dgrowleyml(at)gmail(dot)com> wrote:
>
> On Wed, 15 Apr 2026 at 14:30, Tom Lane <tgl(at)sss(dot)pgh(dot)pa(dot)us> wrote:
> >
> > David Rowley <dgrowleyml(at)gmail(dot)com> writes:
> > > I'd not considered surprise-prone as an aspect. I understand we have
> > > bms_join and bms_union, which do the same thing if you only care about
> > > the value of the result and not what happens to the inputs.
> >
> > Sure, but bms_join is an optional optimization of the far safer
> > bms_union operation. It bothers me to create the optimized case
> > but not the base case.
>
> Hmm, yeah. That seems like a good argument for making a new set. I'll
> go make it so.

Patch attached for the version that creates a new set rather than
modifying the input set in-place.

David