avantgardnerio commented on code in PR #2251:
URL: https://github.com/apache/arrow-rs/pull/2251#discussion_r934918636
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arrow/src/compute/kernels/cast.rs:
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@@ -1584,6 +1625,303 @@ fn cast_string_to_date64<Offset: OffsetSizeTrait>(
Ok(Arc::new(array) as ArrayRef)
}
+fn seconds_since_midnight(time: &chrono::NaiveTime) -> i32 {
+ let sec = time.num_seconds_from_midnight();
+ let frac = time.nanosecond();
+ let adjust = if frac < 1_000_000_000 { 0 } else { 1 };
Review Comment:
I'm a bit confused about this myself. It was my understanding that these
were added manually by timekeepers? Does chrono keep a list of historical leap
seconds?
https://en.wikipedia.org/wiki/Leap_second#:~:text=Between%201972%20and%202020%2C%20a,every%2021%20months%2C%20on%20average.
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