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https://issues.apache.org/jira/browse/ARROW-13262?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=17375998#comment-17375998
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Jonathan Keane commented on ARROW-13262:
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Yeah, it's certainly a bit of an edge case, and might not be worth unscoping or
trying to error more gracefully. But what I find a bit surprising is that I
expected (in this case, at least) that when it pulled into R it would evaluate
correctly since at that point it should be standard dplyr-on-data.frame.
This works:
{code}
> arrow_table %>%
+ collect() %>%
+ transmute(stringr::str_c(x, y, sep = " "))
# A tibble: 3 x 1
`stringr::str_c(x, y, sep = " ")`
<chr>
1 NA
2 NA
3 f i
{code}
But if transmute is above the collect it does not.
> [R] Support namespacing of function maps?
> -----------------------------------------
>
> Key: ARROW-13262
> URL: https://issues.apache.org/jira/browse/ARROW-13262
> Project: Apache Arrow
> Issue Type: Improvement
> Components: R
> Reporter: Jonathan Keane
> Priority: Major
>
> With our NSE function map setup, we translate various functions into Arrow
> equivalents:
> {code}
> library(arrow)
> library(dplyr)
> arrow_table <- Table$create(tibble::tibble(
> v = c("A", "B", "C"),
> w = c("a", "b", "c"),
> x = c("d", NA_character_, "f"),
> y = c(NA_character_, "h", "i"),
> z = c(1.1, 2.2, NA)
> ))
> arrow_table %>%
> transmute(str_c(x, y, sep = " ")) %>%
> collect()
> #> # A tibble: 3 x 1
> #> `str_c(x, y, sep = " ")`
> #> <chr>
> #> 1 <NA>
> #> 2 <NA>
> #> 3 f i
> {code}
> Which is great, however if the code that is being used uses the `sringr::`
> namespace prefix this errors:
> {code}
> arrow_table %>%
> transmute(stringr::str_c(x, y, sep = " ")) %>%
> collect()
> #> Warning: Expression stringr::str_c(x, y, sep = " ") not supported in Arrow;
> #> pulling data into R
> #> Error: Problem with `mutate()` input `..1`.
> #> ℹ `..1 = ..1`.
> #> x object 'x' not found
> {code}
> Should we support this (basically *also* translate {{stringr::str_c()}} to
> what we have for {{str_c()}})? Or warn/error more clearly what happened if we
> don't support any namespace prefixed functions? Something else?
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