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google cloud datastore - YCSB - Workload E SCAN Not Implemented

Why is scan is implemented within the client code for Google Datastore ?

@Override
    public Status scan(String table, String startkey, int recordcount,
    Set<String> fields, Vector<HashMap<String, ByteIterator>> result) {
    // TODO: Implement Scan as query on primary key.
    return Status.NOT_IMPLEMENTED;
    }

As such, this makes the scan portion of workload E redundant.


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