[ARROW-15904] [C++] Support rolling backwards and forwards with temporal arithmetic

• Type: Sub-task
• Status: Open
• Priority: Major
• Resolution: Unresolved
• Component/s: C++
• External issue URL: https://github.com/apache/arrow/issues/31334
• Assignee: Rok Mihevc
• Reporter: Dragoș Moldovan-Grünfeld
• Created: 10/Mar/22 14:53
• Updated: 11/Jan/23 11:40

Description

Original description in ARROW-11090:
"This should also cover the ability to do with and without rollback (so have the 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.)"

For example, in R, lubridate has the following functionality:

• rollbackward() or rollback() which changes a date to the last day of the previous month or to the first day of the current month
• rollforward() which rolls to the last day of the current month or to the first day of the next month.
• all of the above also offer the option to preserve hms (hours, minutes and seconds) when rolling.

This functionality underpins functions such as %m-% and %m+% which are used to add or subtract months to a date without exceeding the last day of the new month.

library(lubridate)

jan <- ymd_hms("2010-01-31 03:04:05")
jan + months(1:3) # Feb 31 and April 31 returned as NA
#> [1] NA                        "2010-03-31 03:04:05 UTC"
#> [3] NA
# NA "2010-03-31 03:04:05 UTC" NA
jan %m+% months(1:3) # No rollover
#> [1] "2010-02-28 03:04:05 UTC" "2010-03-31 03:04:05 UTC"
#> [3] "2010-04-30 03:04:05 UTC"

leap <- ymd("2012-02-29")
"2012-02-29 UTC"
#> [1] "2012-02-29 UTC"
leap %m+% years(1)
#> [1] "2013-02-28"
leap %m+% years(-1)
#> [1] "2011-02-28"
leap %m-% years(1)
#> [1] "2011-02-28"

x <- ymd_hms("2019-01-29 01:02:03")
add_with_rollback(x, months(1))
#> [1] "2019-02-28 01:02:03 UTC"
add_with_rollback(x, months(1), preserve_hms = FALSE)
#> [1] "2019-02-28 UTC"
add_with_rollback(x, months(1), roll_to_first = TRUE)
#> [1] "2019-03-01 01:02:03 UTC"
add_with_rollback(x, months(1), roll_to_first = TRUE, preserve_hms = FALSE)
#> [1] "2019-03-01 UTC"

Issue Links

• is depended upon by: ARROW-14948 [R] Implement lubridate's %m+%, %m-%, add_with_rollback, and addition and subtraction with timestamp
• is depended upon by: ARROW-14945 [R] Implement lubridate functions for doing maths with dates