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Re: Teaching planner to short-circuit empty UNION/EXCEPT/INTERSECT inputs - Mailing list pgsql-hackers

From David Rowley
Subject Re: Teaching planner to short-circuit empty UNION/EXCEPT/INTERSECT inputs
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Msg-id CAApHDvpC+vso+v2aSnqYG5_LKQqFnv9x1OrocEyFo__ek0xusg@mail.gmail.com
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In response to Re: Teaching planner to short-circuit empty UNION/EXCEPT/INTERSECT inputs  (David Rowley <dgrowleyml@gmail.com>)
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On Wed, 5 Nov 2025 at 18:26, David Rowley <dgrowleyml@gmail.com> wrote:
> I'm considering restricting that code Path to where the
> path->parent->reloptkind != RELOPT_UPPER_REL.

I couldn't think of anything better, so here's a patch to that effect.

David
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