tustvold commented on code in PR #3570:
URL: https://github.com/apache/arrow-rs/pull/3570#discussion_r1082281926
##
arrow-csv/src/writer.rs:
##
@@ -88,6 +88,35 @@ where
lexical_to_string(c.value(i))
}
+fn invalid_cast_error(dt: String, col_index: usize, row_index: usize) ->
ArrowError {
+let mut s = String::new();
Review Comment:
format! might be a nicer way to write this, should also perform better
##
arrow-csv/src/writer.rs:
##
@@ -88,6 +88,35 @@ where
lexical_to_string(c.value(i))
}
+fn invalid_cast_error(dt: String, col_index: usize, row_index: usize) ->
ArrowError {
+let mut s = String::new();
+s.push_str("Cannot cast to ");
+s.push_str(&dt);
+s.push_str(" at col index: ");
+s.push_str(col_index.to_string().as_str());
+s.push_str(" row index: ");
+s.push_str(row_index.to_string().as_str());
+ArrowError::CastError(s)
+}
+
+macro_rules! write_temporal_value {
Review Comment:
Does this need to be a macro or can it be a generic
##
arrow-csv/src/writer.rs:
##
@@ -672,4 +710,26 @@ sed do eiusmod
tempor,-556132.25,1,,2019-04-18T02:45:55.55500,23:46:03,foo
let expected = nanoseconds.into_iter().map(Some).collect::>();
assert_eq!(actual, expected);
}
+
+#[test]
+fn test_write_csv_invalid_cast() {
+let schema = Schema::new(vec![
+Field::new("c0", DataType::UInt32, false),
+Field::new("c1", DataType::Date64, false),
+]);
+
+let c0 = UInt32Array::from(vec![Some(123), Some(234)]);
+let c1 = Date64Array::from(vec![Some(1926632005177),
Some(1926632005177685347)]);
+let batch =
+RecordBatch::try_new(Arc::new(schema), vec![Arc::new(c0),
Arc::new(c1)])
+.unwrap();
+
+let mut file = tempfile::tempfile().unwrap();
+let mut writer = Writer::new(&mut file);
+let batches = vec![&batch, &batch];
+for batch in batches {
+writer.write(batch).map_err(|e| { dbg!(e.to_string());
assert!(e.to_string().ends_with(invalid_cast_error("arrow_array::array::primitive_array::PrimitiveArray".to_owned(),
1, 1).to_string().as_str()))}).unwrap_err();
Review Comment:
How about printing the DataType instead?
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