mcvsubbu commented on pull request #6403:
URL: https://github.com/apache/incubator-pinot/pull/6403#issuecomment-759640818


   > Question: Do we need to modify type handling in 
`ConstantValueLongDictionary`, `ConstantValueIntDictionary`, 
`ConstantValueFloatDictionary`, and `ConstantValueDoubleDictionary` (like what 
was done for `IntDictionary`, `FloatDictionary`, and `LongDictionary`)? What 
are ConstantValueXXXDictionary classes used for?
   
   These are used for addiing a dictionary to a column in a CONSUMING segment, 
when a column is added as the segment is being consumed. We reflect the default 
value (coded in the constantValue*Dictionary) for the life of the consuming 
segment.


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