thisisnic commented on code in PR #13440:
URL: https://github.com/apache/arrow/pull/13440#discussion_r909328054
##########
r/R/dplyr-funcs-datetime.R:
##########
@@ -172,6 +172,15 @@ register_bindings_datetime_components <- function() {
(call_binding("yday", x) - 1) %/% 7 + 1
})
+ register_binding("qday", function(x) {
+ x <- build_expr("floor_temporal", x, options = list(unit = 6L,
calendar_based_origin = FALSE))
+ x <- build_expr("cast", x, options = cast_options(to_type =
timestamp("s")))
+ floored_x <- build_expr("floor_temporal", x, options = list(unit = 9L,
calendar_based_origin = FALSE))
+ duration_between <- build_expr("subtract", x, floored_x)
+ seconds_between <- build_expr("cast", duration_between, options =
cast_options(to_type = int64()))
+ build_expr("floor", seconds_between / Expression$scalar(86400L) +
Expression$scalar(1L))
Review Comment:
Please can you add some comments here explaining why we need these steps?
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