> 2. The logic changes in RelationGetBufferForTuple seem bizarre and
> overcomplicated. ISTM that the buffer saved by the bistate ought to
> be about equivalent to relation->rd_targblock, ie, it's your first
> trial location and also a place to save the located buffer on the way
> out. I'd suggest tossing that part of the patch and starting over.
Hmm, would that be safe in the presence of concurrent or recursive
bulk inserts into the same relation?
...Robert