Hello @Werner Stinckens​ !

Thanks for taking the time to answer. The question is rather how much slower would it be. My understanding is that during merge there is a first step of identifying what rows are to be insterted (simple append), thus if this step's duration is minimal (order of seconds) because of having an empty delta table, then it practically does not make any sense to increase our codebase.

If somebody has seen any tests/benchmarks I would appreciate!