On Thu, Jul 26, 2018 at 8:39 PM Andrey Borodin <x4mmm@yandex-team.ru> wrote:
> I'm not sure in architectural point of view: supporting two ways (list and heap) to store result seems may be a bit
heavy,but OK. At least, it has meaningful benefits.
It seems that Nikita have reworked it that way after my suspect that
switching regular scans to pairing heap *might* cause a regression.
However, I didn't insist that we need to support two ways. For
instance, if we can prove that there is no regression then it's fine
to use just heap...
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Alexander Korotkov
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The Russian Postgres Company