ding-young commented on code in PR #7627:
URL: https://github.com/apache/arrow-rs/pull/7627#discussion_r2284086740
##########
arrow-row/src/lib.rs:
##########
@@ -1863,6 +1887,64 @@ mod tests {
back[0].to_data().validate_full().unwrap();
}
+ #[test]
+ fn test_dictionary_in_struct() {
+ let ty = DataType::Struct(
+ vec![Field::new_dictionary(
+ "foo",
+ DataType::Int32,
+ DataType::Int32,
+ false,
+ )]
+ .into(),
+ );
+ let s = arrow_array::new_empty_array(&ty);
+
+ let sort_fields = vec![SortField::new(s.data_type().clone())];
+ let converter = RowConverter::new(sort_fields).unwrap();
+ let r = converter.convert_columns(&[Arc::clone(&s)]).unwrap();
+
+ let back = converter.convert_rows(&r).unwrap();
+ let [s2] = back.try_into().unwrap();
+
+ // RowConverter flattens Dictionary
+ // s.ty = Struct(foo Dictionary(Int32, Int32)), s2.ty = Struct(foo
Int32)
+ assert_ne!(&s.data_type(), &s2.data_type());
+
+ s2.to_data().validate_full().unwrap();
Review Comment:
Since this test uses an empty array, I updated the test to only check both
lengths are 0. Other tests handle value level assertions.
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