[GitHub] [arrow-rs] viirya commented on a change in pull request #1517: Fix get_arrow_field for List

[GitBox <gi...@apache.org>]

viirya commented on a change in pull request #1517:
URL: https://github.com/apache/arrow-rs/pull/1517#discussion_r840764248



##########
File path: parquet/src/arrow/array_reader/builder.rs
##########
@@ -698,7 +700,12 @@ impl<'a> ArrayReaderBuilder {
                         ArrowType::Struct(fields) => {
                             field = fields.iter().find(|f| f.name() == part)
                         }
-                        ArrowType::List(list_field) => field = Some(list_field.as_ref()),
+                        ArrowType::List(list_field) => match list_field.data_type() {
+                            ArrowType::Struct(fields) => {
+                                field = fields.iter().find(|f| f.name() == part)
+                            }
+                            _ => field = Some(list_field.as_ref()),
+                        },

Review comment:
       This was tested by using the example in #1515. Not sure if it is easy to add a unit test.




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