viirya commented on code in PR #3711:
URL: https://github.com/apache/arrow-rs/pull/3711#discussion_r1106048286
##########
arrow-csv/src/reader/mod.rs:
##########
@@ -1318,7 +1339,7 @@ mod tests {
let schema = Schema::new(vec![
Field::new("city", DataType::Utf8, false),
Field::new("lat", DataType::Decimal128(38, 6), false),
- Field::new("lng", DataType::Decimal128(38, 6), false),
+ Field::new("lng", DataType::Decimal256(38, 6), false),
Review Comment:
Maybe use a larger precision/scale for `Decimal256`.
##########
arrow-csv/src/reader/mod.rs:
##########
@@ -1788,20 +1826,20 @@ mod tests {
("-123.", -123000i128),
];
for (s, i) in tests {
- let result = parse_decimal_with_parameter(s, 20, 3);
+ let result = parse_decimal_with_parameter::<Decimal128Type>(s, 20,
3);
assert_eq!(i, result.unwrap())
}
let can_not_parse_tests = ["123,123", ".", "123.123.123"];
for s in can_not_parse_tests {
- let result = parse_decimal_with_parameter(s, 20, 3);
+ let result = parse_decimal_with_parameter::<Decimal128Type>(s, 20,
3);
assert_eq!(
format!("Parser error: can't parse the string value {s} to
decimal"),
result.unwrap_err().to_string()
);
}
let overflow_parse_tests = ["12345678", "12345678.9", "99999999.99"];
for s in overflow_parse_tests {
- let result = parse_decimal_with_parameter(s, 10, 3);
+ let result = parse_decimal_with_parameter::<Decimal128Type>(s, 10,
3);
Review Comment:
Perhaps adding test for `Decimal256Type`.
##########
arrow-csv/src/reader/mod.rs:
##########
@@ -781,22 +795,22 @@ fn parse_bool(string: &str) -> Option<bool> {
}
// parse the column string to an Arrow Array
-fn build_decimal_array(
+fn build_decimal_array<T: DecimalType>(
Review Comment:
👍
##########
arrow-csv/src/writer.rs:
##########
@@ -406,6 +408,59 @@ sed do eiusmod
tempor,-556132.25,1,,2019-04-18T02:45:55.555000000,23:46:03,foo
assert_eq!(expected.to_string(), String::from_utf8(buffer).unwrap());
}
+ #[test]
+ fn test_write_csv_decimal() {
+ let schema = Schema::new(vec![
+ Field::new("c1", DataType::Decimal128(38, 6), true),
+ Field::new("c2", DataType::Decimal256(38, 6), true),
Review Comment:
ditto. Maybe using larger precision/scale for Decimal256.
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