liukun4515 commented on a change in pull request #941:
URL: https://github.com/apache/arrow-rs/pull/941#discussion_r749153410
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File path: arrow/src/csv/reader.rs
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@@ -1055,6 +1140,31 @@ mod tests {
assert_eq!(&metadata, batch.schema().metadata());
}
+ #[test]
+ fn test_csv_reader_with_decimal() {
+ let schema = Schema::new(vec![
+ Field::new("city", DataType::Utf8, false),
+ Field::new("lat", DataType::Decimal(26, 6), false),
+ Field::new("lng", DataType::Decimal(26, 6), false),
+ ]);
+
+ let file = File::open("test/data/uk_cities.csv").unwrap();
+
+ let mut csv = Reader::new(file, Arc::new(schema), false, None, 1024,
None, None);
+ let batch = csv.next().unwrap().unwrap();
+ // access data from a primitive array
+ let lat = batch
+ .column(1)
+ .as_any()
+ .downcast_ref::<DecimalArray>()
+ .unwrap();
+
+ assert_eq!("57.653484", lat.value_as_string(0));
+ assert_eq!("53.002666", lat.value_as_string(1));
+ assert_eq!("52.412811", lat.value_as_string(2));
+ assert_eq!("51.481583", lat.value_as_string(3))
+ }
Review comment:
I have added other test cases to ensure right for above case.
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