Firestore documentation says:
Queries other than document reads
For queries other than document reads, such as a request for a list of collection IDs, you are billed
for one document read. If fetching the complete set of results
requires more than one request (for example, if you are using
pagination), you are billed once per request.
I can not find any information of how to perform such queries - to get only IDs.
Anyone knows how?
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