Robert Haas <robertmhaas(at)gmail(dot)com> writes:
> I have committed this version. I'm expecting Tom to try to find a
> scenario in which it's unfixably broken, so we'll see how that turns
> out; but there seems to be significant support for this feature and
> I'm hopeful that this will pass (or can be made to pass) muster.
I found some problems with it, but with the changes I just committed
it seems like it should be fairly bulletproof.
regards, tom lane