thisisnic commented on code in PR #13118:
URL: https://github.com/apache/arrow/pull/13118#discussion_r871237912
##########
r/R/dplyr-funcs-datetime.R:
##########
@@ -518,6 +518,28 @@ register_bindings_datetime_parsers <- function() {
coalesce_output <- build_expr("coalesce", args = parse_attempt_expressions)
- build_expr("assume_timezone", coalesce_output, options = list(timezone =
tz))
+ if (!is.null(tz)) {
Review Comment:
Please can you add a brief comment about why we need this logic here?
##########
r/R/dplyr-funcs-datetime.R:
##########
@@ -518,6 +518,28 @@ register_bindings_datetime_parsers <- function() {
coalesce_output <- build_expr("coalesce", args = parse_attempt_expressions)
- build_expr("assume_timezone", coalesce_output, options = list(timezone =
tz))
+ if (!is.null(tz)) {
+ build_expr("assume_timezone", coalesce_output, options = list(timezone =
tz))
+ } else {
+ coalesce_output
+ }
+
})
+
+ ymd_parser_vec <- c("ymd", "ydm", "mdy", "myd", "dmy", "dym")
+
+ ymd_parser_map_factory <- function(order) {
+ force(order)
Review Comment:
Why do we need to call `force()` here?
##########
r/R/dplyr-funcs-datetime.R:
##########
@@ -518,6 +518,28 @@ register_bindings_datetime_parsers <- function() {
coalesce_output <- build_expr("coalesce", args = parse_attempt_expressions)
- build_expr("assume_timezone", coalesce_output, options = list(timezone =
tz))
+ if (!is.null(tz)) {
+ build_expr("assume_timezone", coalesce_output, options = list(timezone =
tz))
+ } else {
+ coalesce_output
+ }
+
})
+
+ ymd_parser_vec <- c("ymd", "ydm", "mdy", "myd", "dmy", "dym")
+
+ ymd_parser_map_factory <- function(order) {
+ force(order)
+ function(x, tz = NULL) {
+ parse_x <- call_binding("parse_date_time", x, order, tz)
+ if (is.null(tz)) {
+ parse_x <- parse_x$cast(date32())
Review Comment:
Again, just needs a brief comment here about why we have to cast in this
case.
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