Need to retrieve document ID without using N1QL query(index) and views

I need to retrieve document ID without using N1QL query(Index) and views , is there any other way to retrieve document ID, please let me know.

If you know document id use sdks directly get from KV.
If you don’t know and want to search based on criteria required N1QL query(Index) and views

I don’t have document ID in advance. Is there any other way to retrieve document ID , If we don’t have Views and index(N1QL query) in Couch- base DB?

@Amit_Kulkarni At the heart of Couchbase is a key-value store, where documents are stored and retrieved using their unique document IDs. In some cases the document ID is known (such as a customer ID or email address). In other cases, documents and document IDs can be retrieved using a GSI, FTS, or View index.

You say that you want to retrieve a document ID. What criteria do you have to specify what document you want?