tustvold commented on code in PR #2996:
URL: https://github.com/apache/arrow-rs/pull/2996#discussion_r1011113483
##########
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>>(
Review Comment:
I think we have lost this function?
##########
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:
Perhaps we could call this something like unary_timestamp or something? I
would also not make it public, so we can alter it down the line
##########
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>(
array: A,
+ name: &str,
+ op: F,
) -> Result<Int32Array>
where
+ F: Fn(NaiveDateTime) -> i32,
T: ArrowTemporalType + ArrowNumericType,
i64: From<T::Native>,
{
match array.data_type().clone() {
DataType::Dictionary(_, value_type) => {
- second_internal::<T, A>(array, value_type.as_ref())
+ second_fraction_internal::<T, A, _>(array, value_type.as_ref(),
name, op)
}
- dt => second_internal::<T, A>(array, &dt),
+ dt => second_fraction_internal::<T, A, _>(array, &dt, name, op),
}
}
-/// Extracts the seconds of a given temporal array as an array of integers
-fn second_internal<T, A: ArrayAccessor<Item = T::Native>>(
+/// Extracts the seconds fraction of a given temporal array as an array of
integers
+fn second_fraction_internal<T, A: ArrayAccessor<Item = T::Native>, F>(
Review Comment:
It occurs to me that this function can probably be implemented more
efficiently using try_unary, probably not something for this PR though
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