Robert Haas <robertmhaas@gmail.com> writes:
> If it doesn't have any effect anyway, what's the virtue of back-patching it?
Because 8.4 just fails in cases where we can easily allow it to work
according to the new definition. Right now, if you want to use FOR
UPDATE in a query that has WITHs, you have to carefully write
FOR UPDATE OF x,y,z,... for all the non-WITH relations.
regards, tom lane