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Hey so there are two ways I would recommend this: 1. you can use config.when and pass whether the date is less than the specified one. This means it will be optionally included. We also have more complex methods of resolving pieces of a dag, but I think this is simple enough. 2. you can have that output a dummy value (say, none or nan), and handle that downstream. So it depends on your use-case/how you want to interact with it. Happy to provide some code samepel (AFK right now)

Thank you, I went with option #2 since unlike the example presented, it is not known when the field would/would not be available.

Yep! That’s what I would recommend