Alvaro Herrera wrote:

Is anybody working or considering to work on pg_upgrade, or is all this
hypothetical?  Our past history has seen lots of people offering to work
on pg_upgrade, and none has produced a working version.  Is it fair or
useful to impose restrictions on development just because it's remotely
possible that somebody is going to be motivated enough to consider
producing it?

Depends on the impact the restriction imposes. If stability/scalability/functionality or so is affected, this sounds not tolerable. If it's about not saving two bytes that have been spoiled for ages before, or keeping a backward compatibility type, it appears feasible to me. Changing on-disk structures at the start of the 8.2 dev cycle is a guarantee that nobody will implement pg_upgrade for 8.2.


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