Piotr Stefaniak <postg...@piotr-stefaniak.me> writes:
> using sqlsmith and UBSan I have found these two division by zero errors:

Hmm, thanks.  Seems there's a bit of a disagreement as to whether
path->rows is allowed to be zero or not.  It normally isn't; but
we've created an exception that provably-empty relations have zero
rowcount, so now these places had better deal with the case.

                        regards, tom lane

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