Andrew Dunstan <[EMAIL PROTECTED]> writes:
> However, I don't think we can promise never to change the ondisk 
> representation of data, nor the page layout. Sometimes an inplace 
> upgrade just won't work, ISTM.

We have talked about batching on-disk changes so that they'd only occur
once every few release cycles.  But until we have a pg_upgrade, there is
no reason to adopt such a policy.

                        regards, tom lane

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