dragosmg opened a new pull request #12431:
URL: https://github.com/apache/arrow/pull/12431
This PR adds support for `lubridate::dst()`:
``` r
suppressPackageStartupMessages(library(dplyr))
suppressPackageStartupMessages(library(lubridate))
suppressPackageStartupMessages(library(arrow))
df <- tibble(
dates = as.POSIXct(c("2021-02-20", "2021-07-31", "2021-10-31",
"2021-01-31"), tz = "Europe/London")
)
df %>%
record_batch() %>%
mutate(is_dst = dst(dates)) %>%
collect()
#> # A tibble: 4 × 2
#> dates is_dst
#> <dttm> <lgl>
#> 1 2021-02-20 00:00:00 FALSE
#> 2 2021-07-31 00:00:00 TRUE
#> 3 2021-10-31 00:00:00 TRUE
#> 4 2021-01-31 00:00:00 FALSE
```
will be equivalent to:
``` r
suppressPackageStartupMessages(library(dplyr))
suppressPackageStartupMessages(library(lubridate))
df <- tibble(
dates = as.POSIXct(c("2021-02-20", "2021-07-31", "2021-10-31",
"2021-01-31"), tz = "Europe/London")
)
df %>%
mutate(is_dst = dst(dates))
#> # A tibble: 4 × 2
#> dates is_dst
#> <dttm> <lgl>
#> 1 2021-02-20 00:00:00 FALSE
#> 2 2021-07-31 00:00:00 TRUE
#> 3 2021-10-31 00:00:00 TRUE
#> 4 2021-01-31 00:00:00 FALSE
```
<sup>Created on 2022-02-15 by the [reprex
package](https://reprex.tidyverse.org) (v2.0.1)</sup>
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