Andrei Lepikhov <lepi...@gmail.com> writes:
> Pardon the noise, but I'm curious why the optimiser must choose NestLoop 
> in the case of lateral reference.

To pass down the current outer row's value of the lateral reference.

> It would be nice to provide alternatives. Because now we have some 
> corner cases.

That's a fairly bizarre case, and I'm not at all convinced that
the old plan was correct.

                        regards, tom lane


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