On Thu, May 28, 2009 at 12:21 PM, Tom Lane <tgl@sss.pgh.pa.us> wrote:
> Robert Haas <robertmhaas@gmail.com> writes:
>> What's hard about that? INSERTs are the hard case, because the rows
>> you care about don't exist yet. SELECT, UPDATE, and DELETE are easy
>> by comparison; you can lock the actual rows at issue. Unless I'm
>> confused?
>
> UPDATE isn't really any easier than INSERT: the update might cause
> the row to satisfy someone else's search condition that it didn't
> previously satisfy.
Good point.
...Robert
