"Merlin Moncure" <[EMAIL PROTECTED]> writes:
> Nailed it.

> problem is in mainloop.c -> setup_cancel_handler.  Apparently you can
> have multiple handlers and windows keeps track of them all, even if they
> do the same thing.  Keeping track of so many system handles would
> naturally slow the whole process down.

Yipes.  So we really want to do that only once.

AFAICS it is appropriate to move the sigsetjmp and setup_cancel_handler
calls in front of the per-line loop inside MainLoop --- can anyone see
a reason not to?

I'm inclined to treat this as an outright bug, not just a minor
performance issue, because it implies that a sufficiently long psql
script would probably crash a Windows machine.

                        regards, tom lane

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