alamb commented on a change in pull request #9064:
URL: https://github.com/apache/arrow/pull/9064#discussion_r552200495



##########
File path: rust/parquet/src/file/serialized_reader.rs
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@@ -137,6 +137,22 @@ impl<R: 'static + ChunkReader> SerializedFileReader<R> {
             metadata,
         })
     }
+
+    pub fn filter_row_groups(

Review comment:
       > however I think this falls outside of the scope of this PR;
   
   I agree -- this is already a large enough PR (and important enough). If we 
need to add some non ideal api to parquet and then upgrade it later I think 
that is the better approach. 




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