thisisnic commented on issue #38031:
URL: https://github.com/apache/arrow/issues/38031#issuecomment-1748601968
Could you do something like this?
``` r
library(arrow)
#> Some features are not enabled in this build of Arrow. Run `arrow_info()`
for more information.
#>
#> Attaching package: 'arrow'
#> The following object is masked from 'package:utils':
#>
#> timestamp
library(dplyr)
#>
#> Attaching package: 'dplyr'
#> The following objects are masked from 'package:stats':
#>
#> filter, lag
#> The following objects are masked from 'package:base':
#>
#> intersect, setdiff, setequal, union
tf <- tempfile()
dir.create(tf)
write_dataset(group_by(mtcars, am), tf, format = "csv")
columns_i_care_about <- c("mpg", "hp")
open_dataset(tf, format = "csv") %>%
select(!!columns_i_care_about) %>%
collect()
#> # A tibble: 32 × 2
#> mpg hp
#> <dbl> <int>
#> 1 21.4 110
#> 2 18.7 175
#> 3 18.1 105
#> 4 14.3 245
#> 5 24.4 62
#> 6 22.8 95
#> 7 19.2 123
#> 8 17.8 123
#> 9 16.4 180
#> 10 17.3 180
#> # ℹ 22 more rows
```
<sup>Created on 2023-10-05 with [reprex
v2.0.2](https://reprex.tidyverse.org)</sup>
If not, please can you make me a small reprex showing the kind of thing
you'd like to do?
--
This is an automated message from the Apache Git Service.
To respond to the message, please log on to GitHub and use the
URL above to go to the specific comment.
To unsubscribe, e-mail: [email protected]
For queries about this service, please contact Infrastructure at:
[email protected]
