jorgecarleitao commented on pull request #11138: URL: https://github.com/apache/arrow/pull/11138#issuecomment-917581003
You are right 👍 I understood that comment to differentiate it from `Duration`, that denotes a physical time interval. Specifically, my understanding is that `Duration[s](1)` equals 1 second as per its definition of [atomic clocks and stuff](https://en.wikipedia.org/wiki/Second). In opposition to an `Interval`, that corresponds time units that are constructs associated with a calendar (historically associated with the Earth and moon movements), such as "Month", "day", etc. The main difference (in my understanding) is that `add_duration(now,duration(MS_IN_DAY)) - now = duration(MS_IN_DAY)` and `add_interval(now,interval(1d)) - now = interval(1d)`, but `duration(MS_IN_DAY) != interval(1d)` because we may cross a (calendar) offset, either due to a leap second, leap hour (daylight, which I forgot about in the comment above), leap day (February), etc. -- This is an automated message from the Apache Git Service. To respond to the message, please log on to GitHub and use the URL above to go to the specific comment. To unsubscribe, e-mail: [email protected] For queries about this service, please contact Infrastructure at: [email protected]
