Eric5553 edited a comment on issue #27368: [SPARK-30651][SQL] Add detailed 
information for Aggregate operators in EXPLAIN FORMATTED
URL: https://github.com/apache/spark/pull/27368#issuecomment-581900516
 
 
   > About the changes, in the cases where Keys or Functions are empty, does it 
make sense
   > to not print them ? cc @maropu @cloud-fan for their opinion.
   
   
   I think we can keep empty Keys or Functions printed, which means the node 
has no Keys or Functions. Otherwise we don't know if the explain message means 
`no Keys/Functions` or `we missed the details for them`. 
   What do you think? @dilipbiswal @maropu @cloud-fan 
   

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