[candiddevmike]

How do you handle trigger logic that compares old/new without having a round trip back to the application?

[SoftTalker]

Do it in a stored procedure not a trigger. Triggers have their place but a stored procedure is almost always better. Triggers can surprise you.

[candiddevmike]

I don't follow how you would do that in a stored procedure outside of a trigger.

[const_cast]

I think instead of performing an INSERT you call a stored proc that does the insert and some extra stuff.

[shivasaxena]

Yes, we already have all of our business logic in postgres functions(create_order, create_partial_payment etc).

Doing the extra work in stored procedures is noticeably faster than relying on triggers.