ovr commented on code in PR #2052:
URL: https://github.com/apache/arrow-rs/pull/2052#discussion_r919192786
##########
arrow/src/compute/kernels/temporal.rs:
##########
@@ -112,32 +112,62 @@ macro_rules! return_compute_error_with {
};
}
-trait ChronoDateQuarter {
+// Internal trait, which is used for mapping values from DateLike structures
+trait ChronoDateExt {
/// Returns a value in range `1..=4` indicating the quarter this date
falls into
fn quarter(&self) -> u32;
/// Returns a value in range `0..=3` indicating the quarter (zero-based)
this date falls into
fn quarter0(&self) -> u32;
+
+ fn weekday_from_sunday(&self) -> i32;
}
-impl ChronoDateQuarter for NaiveDateTime {
+impl<T: Datelike> ChronoDateExt for T {
fn quarter(&self) -> u32 {
self.quarter0() + 1
}
fn quarter0(&self) -> u32 {
self.month0() / 3
}
-}
-impl ChronoDateQuarter for NaiveDate {
- fn quarter(&self) -> u32 {
- self.quarter0() + 1
+ fn weekday_from_sunday(&self) -> i32 {
+ self.weekday().num_days_from_sunday() as i32
}
+}
- fn quarter0(&self) -> u32 {
- self.month0() / 3
+/// Extracts the day of week of a given temporal array as an array of integers
+pub fn dow<T>(array: &PrimitiveArray<T>) -> Result<Int32Array>
Review Comment:
Wow, I didn't saw this new method, because we use old DF & old Arrow.
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