mapleFU commented on PR #41975:
URL: https://github.com/apache/arrow/pull/41975#issuecomment-2167238617

   @felipecrv I just think about is there some techniques to denote an 
`ArrayData` is "owned and writable", like the output of `PrepareOutput`. This 
can do some techniques, like:
   1. Optimizing data transform in Parquet reader
   2. Do some optimization like reuse-input


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