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https://issues.apache.org/jira/browse/ARROW-14471?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=17488164#comment-17488164
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Dragoș Moldovan-Grünfeld edited comment on ARROW-14471 at 2/8/22, 3:54 PM:
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{{lubridate}} uses {{guess_formats()}} to identify the likely candidates. We
could try something similar, where we have a list of supported formats
(something similar to
[this|https://github.com/dragosmg/arrow/blob/cfba9e1dfbedd5dfdf652c805e93692808dd092e/r/R/dplyr-funcs-datetime.R#L152-L196]),
which we then narrow down to the most likely ones. Only then use something
like {{{}coalesce(){}}}.
was (Author: dragosmg):
{{lubridate}} has {{guess_formats()}} to identify the likely candidates. We
could try something similar, where we have a list of supported formats
(something similar to
[this|https://github.com/dragosmg/arrow/blob/cfba9e1dfbedd5dfdf652c805e93692808dd092e/r/R/dplyr-funcs-datetime.R#L152-L196]),
which we then narrow down to the most likely ones. Only then use something
like {{{}coalesce(){}}}.
> [R] Implement lubridate's date/time parsing functions
> -----------------------------------------------------
>
> Key: ARROW-14471
> URL: https://issues.apache.org/jira/browse/ARROW-14471
> Project: Apache Arrow
> Issue Type: Sub-task
> Components: R
> Reporter: Nicola Crane
> Assignee: Dragoș Moldovan-Grünfeld
> Priority: Major
> Labels: pull-request-available
> Fix For: 8.0.0
>
> Time Spent: 20m
> Remaining Estimate: 0h
>
> Parse dates with year, month, and day components:
> ymd() ydm() mdy() myd() dmy() dym() yq() ym() my()
>
> Parse date-times with year, month, and day, hour, minute, and second
> components:
> ymd_hms() ymd_hm() ymd_h() dmy_hms() dmy_hm() dmy_h() mdy_hms() mdy_hm()
> mdy_h() ydm_hms() ydm_hm() ydm_h()
> Parse periods with hour, minute, and second components:
> ms() hm() hms()
>
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