orgadish opened a new issue, #38031:
URL: https://github.com/apache/arrow/issues/38031

   ### Describe the enhancement requested
   
   Per the documentation, `col_select` is currently not supported in 
`arrow::open_csv_dataset` and it is recommended to "instead, subset columns 
after dataset creation". 
   
   This approach doesn't work, however, when the files don't share the total 
schema. Often, though, I may only care about a subset of columns which I know 
are shared by all the files, even if random other columns have been added in. 
It would be great if there was a way to specify that columns outside the schema 
should be ignored, or to enable `col_select`.
   
   ### Component(s)
   
   R


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