Igosuki edited a comment on issue #1777:
URL: 
https://github.com/apache/arrow-datafusion/issues/1777#issuecomment-1034741516


   @matthewmturner 
   For instance : 
https://github.com/apache/spark/blob/master/sql/core/src/main/scala/org/apache/spark/sql/package.scala
 
   Or after writing a parquet file with pandas : 
   ```
   ############ file meta data ############
   created_by: parquet-cpp-arrow version 6.0.1
   ```
   
   Of course then other arbitrary metadata, for other systems such as 
warehouses.


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