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firebase - In Cloud Firestore, why is it not possible to "single bulk" delete a collection (as can be done with Realtime Database)?

With Firebase real time database we can delete a huge list of items with one single command simply by calling remove () on the parent node (the node is deleted and all is children too).

But according to the documentation with Firestore (https://firebase.google.com/docs/firestore/manage-data/delete-data#collections ) :
to delete a Collection we have to code a batch that will to loop over all its documents and delete them one by one .

This is not efficient at all. Is it because Firestore is in beta version or is it structurally impossible to delete the full node (Collection) in one single call ?

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