I hope this isn't a silly question.
I've seen some amazing features for customer expressions (incl. calculations) and also joining tables.
But I can't see any of this functionality on my Custom Question. See the screenshot for what I can see.
My DB is Atlas (Mongo DB). Metabase is on v0.34.3, which I believe is the latest.
Would massively appreciate any help here. Thank you!
Hi @alex_pluto
Custom expressions are not currently available on MongoDB:
https://github.com/metabase/metabase/issues/7097 - upvote by clicking
on the first post
There’s a couple of other limitations for MongoDB with the Notebook editor:
https://www.metabase.com/docs/latest/users-guide/custom-questions.html
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Thank you very much @flamber, this is a real shame 
If you’re involved - do you have any idea if these two items are officially roadmapped and when they might be available?
Thanks again!
@alex_pluto Metabase got support for filter variables on MongoDB in 0.34.0, which was a highly requested feature, but currently this is not on roadmap.
Fair enough, appreciate the update!