nevi-me commented on a change in pull request #491:
URL: https://github.com/apache/arrow-rs/pull/491#discussion_r674618144
##########
File path: parquet/src/arrow/arrow_reader.rs
##########
@@ -668,4 +668,20 @@ mod tests {
batch.unwrap();
}
}
+
+ #[test]
+ fn test_read_maps() {
+ let testdata = arrow::util::test_util::parquet_test_data();
+ let path = format!("{}/nested_maps.snappy.parquet", testdata);
+ let parquet_file_reader =
+
SerializedFileReader::try_from(File::open(&path).unwrap()).unwrap();
+ let mut arrow_reader =
ParquetFileArrowReader::new(Arc::new(parquet_file_reader));
+ let record_batch_reader = arrow_reader
+ .get_record_reader(60)
+ .expect("Failed to read into array!");
+
+ for batch in record_batch_reader {
+ batch.unwrap();
Review comment:
This is a bit tricky @alamb, because there's no output data to compare
what's read to. The parquet test data that's used by parquet-mr, parquet-cpp
and parquet-rs don't have equivalent JSON files like other integration tests.
So, the next best thing has been to read the files, and confirm that the
reader doesn't error out.
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