Jim Nasby <jim.na...@bluetreble.com> writes:
> On 10/21/16 7:43 PM, Tom Lane wrote:
>> Alvaro Herrera <alvhe...@2ndquadrant.com> writes:
>>> Agreed.  The problem is how to install it without breaking pg_upgrade.

> It can't look up relation names?

It can't shove 64 bytes into a page that has < 64 bytes free space.

>> Well, that's the first problem.  The second problem is how to cope with

> If the name was only encoded in the first block of the relation I'm not 
> sure how bad this would be; are there any facilities to change the name 
> back on a rollback?

No.  How would that work in crash situations?  (And keep in mind that the
argument for this hinges entirely on its being 100% trustworthy after a

                        regards, tom lane

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