[marcosdumay]

One is better keeping heavy processing away from the database. Your application layer can scale almost indefinitely, and the main bottleneck for a random system is usually the database.

As a rule, processing cost should give you a default bias into moving anything away from the database. Multiple sources, the need for temporary storage, and the existence of concerns that don't deal directly with your data should bias you more towards moving your code away from the database.

On the other hand, data consolidation and enforcing non-local (to a record) rules should bias you towards moving your code into the database. If a lot of those happen, moving it there may even reduce the load of your database.

Any one sided advice here is guaranteed to be wrong.