> Just to avoid any confusion with the patch I sent out this
> week, we are setting HEAP_UPDATE_ROOT on all tuples which are
> HOT-updated.
>
> We set HEAP_ONLY_TUPLE for all tuples which does not have
> index reference. So may be combination of (HEAP_UPDATE_ROOT &
> ~HEAP_ONLY_TUPLE) can be used to identify index referred
> tuple in a HOT-update chain.
Oh sorry. Thanks for the clarification. Imho HEAP_UPDATE_ROOT should be
renamed for this meaning then (or what does ROOT mean here ?).
Maybe HEAP_UPDATE_CHAIN ?
Andreas