pg_dump from older version and pg_restore in newer

From: "Perry, Hemy" <hemy_perry(at)mentor(dot)com>
To: "pgsql-admin(at)postgresql(dot)org" <pgsql-admin(at)postgresql(dot)org>
Subject: pg_dump from older version and pg_restore in newer
Date: 2015-01-18 10:25:37
Message-ID: CCA7F829407A9D46B8358520B195A929CE71B55C@EU-MBX-04.mgc.mentorg.com
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Hi,

I am planning a migration from 9.1.7 to 9.4.0.
On many threads I noticed that the recommendation is "Be sure to use pg_dump from the *new* version to take the dump from the old database."

Is that a must?
Is there a chance that a restore using new version will fail because the dump was taken with *old* bin?

Regards
Hemy

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