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Ah, looks like psql seems to have switched to actually using minor and major versions properly during the last two years - I remember the dance from the 9.x versions and postgres-upgrade [1].

In any case it's way more straightforward with mysql.

[1] https://hub.docker.com/r/tianon/postgres-upgrade




For Docker usage you'll probably be better off with the "automatic upgrade" images instead:

https://hub.docker.com/r/pgautoupgrade/pgautoupgrade

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That being said, those pgautoupgrade images are alpine Linux based.

People coming from non-alpine Linux images of PostgreSQL will probably need that older not-automatic approach you linked to.




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