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Posted to issues@arrow.apache.org by "Nicola Crane (Jira)" <ji...@apache.org> on 2021/12/01 16:37:00 UTC

[jira] [Created] (ARROW-14947) [C++] Implement maths with timestamps?

Nicola Crane created ARROW-14947:
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             Summary: [C++] Implement maths with timestamps?
                 Key: ARROW-14947
                 URL: https://issues.apache.org/jira/browse/ARROW-14947
             Project: Apache Arrow
          Issue Type: Sub-task
          Components: C++
            Reporter: Nicola Crane


Please could we have maths with timestamps implemented?

In order to implement some of the functionality I'd like in R, I need to be able to do maths with dates.  For example:

* Addition and subtraction: Timestamp + Duration = Timestamp (with and without rollback so have ability to do e.g. 2021-03-30 minus 1 month and either get a null back, or 2021-02-28), plus the ability to specify whether to rollback to the first or last, and whether to preserve or rest the time.

See https://lubridate.tidyverse.org/reference/mplus.html for documentation of the R functionality.

* Multiplying Durations: Duration * Numeric = Duration



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