jorisvandenbossche commented on pull request #11351:
URL: https://github.com/apache/arrow/pull/11351#issuecomment-939047021


   Tested this branch, and it seems to work nicely. I was just looking into the 
topic of "selecting nested columns" for ORC 
(https://github.com/apache/arrow/pull/11372), and selecting lists elements 
actually uses different "dotted paths" in ORC compared to Parquet. 
   For example, your example in the top post of 
`file.read(["root.list.item.addr.that"])` needs to be written as 
`file.read(["root.addr.that"])` for an ORCFile. 
   
   Not for this PR, but that's maybe something to consider for Parquet as well? 
(I personally like this simplified selecting; the "list.item" part in the path 
for lists is basically superfluous, since lists always have a single child)
   


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