kennknowles opened a new issue, #18994:
URL: https://github.com/apache/beam/issues/18994

   datastoreio discards the entity key and just returns a collection of decoded 
entities.
   
   This might work for some use cases but often you need to know the key of the 
entity you're operating on, e.g. if you need to update it or store a reference 
to it.
   
   Maybe it should return a PCollection<*datastore.Key, T\> instead of just 
PCollection<T\>?
   
   Or PCollection<string, T\> using key.Encode(), since the go sdk doesn't seem 
to support pointers yet.
   
   Imported from Jira 
[BEAM-5201](https://issues.apache.org/jira/browse/BEAM-5201). Original Jira may 
contain additional context.
   Reported by: ribrdb.


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