How to use fs-bq-import-collection with sub collections

[moritzopitz]

Hi all,

I am trying to make an export of existing documents from a Firestore sub collection to BigQuery.
I already successfully used the script to do this for a collection, but with the sub collection I am getting an error when I try:
npx @firebaseextensions/fs-bq-import-collection --non-interactive -P acb-prod -s customers/{customerId}/calls -d exp_firebase_extension_eu -t client_calls -l europe-west1 -b 1000 -u false -e false -q false
When I check the README, I can see that I can not use wildcards for the collection path and I should use a collectionGroup query instead. How would the right syntax be for this? I dont understand how I can parse my subcollection without using wildcards.

Edit: it seems by just passing "calls" as collectionGroup, every collection and subcollection with the name "calls" gets imported, no matter on which level it is. Is that correct?

Thanks a lot!