On Wed, Dec 23, 2020 at 3:41 AM Heikki Linnakangas <hlinnaka@iki.fi> wrote:
I'm not sure it's worth the trouble, though. Custom conversions are very rare. And I don't think any other object can depend on a conversion, so you can always drop the conversion before upgrade, and re-create it with the new function signature afterwards. A note in the release notes and a check in pg_upgrade, with instructions to drop and recreate the conversion, are probably enough.
