alamb opened a new pull request, #9087:
URL: https://github.com/apache/arrow-datafusion/pull/9087

   ## Which issue does this PR close?
   
   Part of https://github.com/apache/arrow-datafusion/issues/5472
   
   ## Rationale for this change
   This is something I noticed while working on 
https://github.com/apache/arrow-datafusion/pull/8849
   
   The count distinct module was getting large so splitting it into smaller 
modules would makes things easier to navigate
   
   
   ## What changes are included in this PR?
   
   1. Move code to native.rs module (to mirror 
[strings.rs](https://github.com/apache/arrow-datafusion/blob/main/datafusion/physical-expr/src/aggregate/count_distinct/strings.rs))
   1. rename native to `NativeDistinctCountAccumulator` to 
`PrimitiveDistinctCountAccumulator` to align with `ArrowPrimitiveType`
   2. add some more docs
   3. Remove an unecessary typedef
   
   
   ## Are these changes tested?
   By existing tests
   
   ## Are there any user-facing changes?
   No, this is internal code reorganization. None of this code is accessible 
outside of the crate
   


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