waitingkuo commented on code in PR #2996:
URL: https://github.com/apache/arrow-rs/pull/2996#discussion_r1011348242
##########
arrow/src/compute/kernels/temporal.rs:
##########
@@ -717,49 +717,65 @@ where
T: ArrowTemporalType + ArrowNumericType,
i64: From<T::Native>,
{
- second_generic::<T, _>(array)
+ second_fraction_generic::<T, _, _>(array, "second", |t| t.second() as i32)
}
-/// Extracts the seconds of a given temporal array as an array of integers
-pub fn second_generic<T, A: ArrayAccessor<Item = T::Native>>(
+/// Extracts the nanoseconds of a given temporal primitive array as an array
of integers
+pub fn nanosecond<T>(array: &PrimitiveArray<T>) -> Result<Int32Array>
+where
+ T: ArrowTemporalType + ArrowNumericType,
+ i64: From<T::Native>,
+{
+ second_fraction_generic::<T, _, _>(array, "nanosecond", |t| t.nanosecond()
as i32)
+}
+
+/// Extracts the seconds fraction of a given temporal array as an array of
integers
+pub fn second_fraction_generic<T, A: ArrayAccessor<Item = T::Native>, F>(
Review Comment:
i suggest that we could either
1. separate them (aka second_generic, and nano_generic), keep it consistent
wither other operator
2. make it more general, combines not only second, nanosecond. (e.g.
`second_fraction_generic::<T, _, _>(array, "minute", |t| t.minute() as i32`
should work for `minute`)
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