Yugo Nagata <nagata(at)sraoss(dot)co(dot)jp> writes:
> I'm sorry the patch attached in the previous mail is broken and
> not raises a compile error. I attached the fixed patch.
This patch is almost certainly wrong: you can't assume that the scan-level
state matches the tuple we are currently processing at top level. Any
sort of delaying action, for instance a sort or materialize node in
between, would break it.
We need to either fix this aspect:
>> IndexOnlyScan returns a virtual tuple that doesn't have system
>> column, so we can not get ctid in the same way of other plans.
or else disallow using IndexOnlyScan when the ctid is needed.
regards, tom lane