Re: HOT updates & REDIRECT line pointers

Robert Haas <robertmhaas@gmail.com> writes:
> On Wed, Mar 21, 2012 at 8:13 PM, Tom Lane <tgl@sss.pgh.pa.us> wrote:
>> Another issue, quite independent from race conditions against other
>> observers of the row, is what if the tuple is part of an update chain?
>> You have no way to find the predecessor row version and update its
>> t_ctid forward link.

> I don't see why I need to.  The predecessor, if any, points to the
> root of the HOT chain;

Oh, right.  So scratch that objection.  The other one is still fatal
though ...
        regards, tom lane