mustafasrepo opened a new pull request, #7099:
URL: https://github.com/apache/arrow-datafusion/pull/7099

   # Which issue does this PR close?
   
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   Closes #.
   
   # Rationale for this change
   ProjectionExec has `columns_map: HashMap<Column, Vec<Column>>`. This map 
stores the mapping between columns in the input schema, and columns in the 
projection schema. During mapping it does matching according to name search. 
However, this is prone to error, since we may have columns with same name in 
the schema (such as after join).
   This Pr removes name search during association. 
   
   
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   # What changes are included in this PR?
   
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   # Are these changes tested?
   Yes new tests are added.
   
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