So far, I have nothing to add, but just one thing. See below:
On 09.04.2018 00:37, g@luxsci.net wrote:
> One advantage to using logic and functions in the db is that you can
> fix things immediately without having to make new application builds.
> That in itself is a huge advantage, IMO.
This is actually not the case. You want to have those logic tested as
thoroughly as possible being so close to your precious data.
So, you write migration code that substitutes the old logic, test the
whole package, if successful, deploy (and thus run the migration).
Cheers,
Sven