Hi there,
I’m not sure how to handle NULL values in my incoming event data. Specifically, I want a conditional true/false branch based on whether an event attribute’s value is NULL, or whether it’s populated (it’s normally a epoch timestamp, so, an int I think). It’s the “crossed_at” attribute here:

And here are my options for the conditional branch:

For “does not exist”, will that include attributes that technically DO exist but have a value NULL? I wish there were one that said “is null”. Even better would be to have that one PLUS “is blank”, which would indicate “either missing or null or empty string”, which is super handy.
Anyway, does anyone know how to definitively branch on NULL? I could experiment with a bunch of these, but thought I’d check with the community (cough...Felix...cough :) first.
Thanks,
TOM