David Li created ARROW-13548:
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Summary: [C++] Implement datediff kernel
Key: ARROW-13548
URL: https://issues.apache.org/jira/browse/ARROW-13548
Project: Apache Arrow
Issue Type: Improvement
Components: C++
Reporter: David Li
Add a kernel to convert a timedelta into a number of years, months, weeks,
days, hours, minutes, (micro/milli/nano)seconds, or quarters.
This should act like SQL's DATEDIFF/EXTRACT ([SQL
Server|https://docs.microsoft.com/en-us/sql/t-sql/functions/datediff-transact-sql?view=sql-server-ver15],
[Postgres|https://www.postgresql.org/docs/current/functions-datetime.html#FUNCTIONS-DATETIME-EXTRACT]).
Pandas doesn't have a convenient equivalent except in the case of days
(pd.Timedelta.days).
We have hinnant's date library vendored and this should hopefully be
implementable with that.
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