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Posted to github@arrow.apache.org by GitBox <gi...@apache.org> on 2022/04/06 07:14:44 UTC

[GitHub] [arrow-rs] viirya commented on a diff in pull request #1517: Fix reading nested lists from parquet files

viirya commented on code in PR #1517:
URL: https://github.com/apache/arrow-rs/pull/1517#discussion_r843553390


##########
parquet/src/arrow/array_reader/builder.rs:
##########
@@ -321,70 +323,71 @@ impl<'a> TypeVisitor<Option<Box<dyn ArrayReader>>, &'a ArrayReaderBuilderContext
             _ => (),
         }
 
-        let item_reader = self
-            .dispatch(item_type.clone(), &new_context)
-            .unwrap()
-            .unwrap();

Review Comment:
   When a column is not included, `dispatch` will return None. `unwrap` here will get unexpected error.



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