AlenkaF commented on PR #47253:
URL: https://github.com/apache/arrow/pull/47253#issuecomment-3416863223

   I had another look at it today. I also found a part in the documentation 
that should fit with this use case:
   
https://arrow.apache.org/docs/python/parquet.html#writing-metadata-and-common-metadata-files
   
   Unfortunately I wasn't able to make it work with the example from the 
reported issue.
   
   I am still not comfortable to add spark row group metadata changes in 
PyArrow though I agree we should make it easier in PyArrow to handle such cases.
   
   Would you be willing to also give a try at the proposed `_metadata` or 
`_common_metadata` files from linked documentation and see if it would be 
something we can use and potentially simplify?
   
   @pitrou what do you think about PyArrow updating spark row group metadata in 
cases where PyArrow is being used for data manipulation with schema changes in 
between spark workloads?


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