Tom Lane <tgl@sss.pgh.pa.us> wrote:
> Hmm, I would think you'd get assertion failures from calling
> HeapTupleHeaderGetCmax when xmax isn't the current transaction.
> (But I'm not sure that the regression tests really exercise such
> cases ... did you try the isolation tests with this?) I was
> thinking we should probably define the cmax as being returned only
> in SelfUpdated cases.
You were right. One of the isolation tests failed an assertion;
things pass with the attached change, setting the cmax
conditionally. Some comments updated. I hope this is helpful. I
can't take more time right now, because we're getting major snowfall
and I've got to leave now to get home safely.
-Kevin