Tomas Vondra <> writes:
> I believe the attached patch should fix this by actually copying the 
> tuples into the densely allocated chunks. Haven't tested it though, will 
> do in a few hours.

BTW, I confirmed that this patch fixes the wrong-number-of-output-tuples
issue in the test case from bug #13908.  So that shows that the diagnosis
is correct.  We still need to clean up the patch, but this way does work
to fix the problem.

                        regards, tom lane

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