across() does not work for formula interface

[lorenzwalthert]

Similar to #518, but specifically related to the formula interface. With the devel version of dbplyr and the CRAN version of dplyr.

library(dplyr)
#> Warning: package 'dplyr' was built under R version 4.0.2
#> 
#> 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
# works
iris %>% 
  dbplyr::memdb_frame() %>%
  mutate(across(matches("Sepal"), log)) %>%
  invisible()

# does not work
iris %>% 
  dbplyr::memdb_frame() %>%
  mutate(across(matches("Sepal"), ~log(.x)))
#> Error: Unsupported `.fns` for dbplyr::across()

iris %>% 
  dbplyr::memdb_frame() %>%
  mutate(across(matches("Sepal"), ~log(.)))
#> Error: Unsupported `.fns` for dbplyr::across()


# these all work in-memory 
iris %>% 
  # dbplyr::memdb_frame() %>%
  mutate(across(matches("Sepal"), ~log(.))) %>%
  invisible()

iris %>% 
  # dbplyr::memdb_frame() %>%
  mutate(across(matches("Sepal"), ~log(.x))) %>%
  invisible()

^{Created on 2020-10-21 by the reprex package (v0.3.0)}

Session info

devtools::session_info()
#> ─ Session info ───────────────────────────────────────────────────────────────
#>  setting  value                       
#>  version  R version 4.0.0 (2020-04-24)
#>  os       macOS Catalina 10.15.6      
#>  system   x86_64, darwin17.0          
#>  ui       X11                         
#>  language (EN)                        
#>  collate  en_US.UTF-8                 
#>  ctype    en_US.UTF-8                 
#>  tz       Europe/Zurich               
#>  date     2020-10-21                  
#> 
#> ─ Packages ───────────────────────────────────────────────────────────────────
#>  package     * version     date       lib source                             
#>  assertthat    0.2.1       2019-03-21 [1] CRAN (R 4.0.0)                     
#>  backports     1.1.10      2020-09-15 [1] CRAN (R 4.0.2)                     
#>  bit           1.1-15.2    2020-02-10 [1] CRAN (R 4.0.0)                     
#>  bit64         0.9-7       2017-05-08 [1] CRAN (R 4.0.0)                     
#>  blob          1.2.1       2020-01-20 [1] CRAN (R 4.0.0)                     
#>  callr         3.5.0       2020-10-08 [1] CRAN (R 4.0.0)                     
#>  cli           2.1.0       2020-10-12 [1] CRAN (R 4.0.2)                     
#>  crayon        1.3.4       2017-09-16 [1] CRAN (R 4.0.0)                     
#>  DBI           1.1.0       2019-12-15 [1] CRAN (R 4.0.0)                     
#>  dbplyr        1.99.0.9000 2020-10-21 [1] Github (tidyverse/dbplyr@8e63f33)  
#>  desc          1.2.0       2018-05-01 [1] CRAN (R 4.0.0)                     
#>  devtools      2.3.2       2020-09-18 [1] CRAN (R 4.0.2)                     
#>  digest        0.6.25      2020-02-23 [1] CRAN (R 4.0.2)                     
#>  dplyr       * 1.0.2       2020-08-18 [1] CRAN (R 4.0.2)                     
#>  ellipsis      0.3.1       2020-05-15 [1] CRAN (R 4.0.0)                     
#>  evaluate      0.14        2019-05-28 [1] CRAN (R 4.0.0)                     
#>  fansi         0.4.1       2020-01-08 [1] CRAN (R 4.0.0)                     
#>  fs            1.5.0       2020-07-31 [1] CRAN (R 4.0.2)                     
#>  generics      0.0.2       2018-11-29 [1] CRAN (R 4.0.0)                     
#>  glue          1.4.2       2020-08-27 [1] CRAN (R 4.0.2)                     
#>  highr         0.8         2019-03-20 [1] CRAN (R 4.0.0)                     
#>  htmltools     0.5.0       2020-06-16 [1] CRAN (R 4.0.0)                     
#>  knitr         1.30        2020-09-22 [1] CRAN (R 4.0.2)                     
#>  lifecycle     0.2.0       2020-03-06 [1] CRAN (R 4.0.0)                     
#>  magrittr    * 1.5.0.9000  2020-09-28 [1] Github (tidyverse/magrittr@0221e18)
#>  memoise       1.1.0       2017-04-21 [1] CRAN (R 4.0.0)                     
#>  pillar        1.4.6       2020-07-10 [1] CRAN (R 4.0.0)                     
#>  pkgbuild      1.1.0       2020-07-13 [1] CRAN (R 4.0.2)                     
#>  pkgconfig     2.0.3       2019-09-22 [1] CRAN (R 4.0.0)                     
#>  pkgload       1.1.0       2020-05-29 [1] CRAN (R 4.0.0)                     
#>  prettyunits   1.1.1       2020-01-24 [1] CRAN (R 4.0.0)                     
#>  processx      3.4.4       2020-09-03 [1] CRAN (R 4.0.2)                     
#>  ps            1.4.0       2020-10-07 [1] CRAN (R 4.0.2)                     
#>  purrr         0.3.4       2020-04-17 [1] CRAN (R 4.0.0)                     
#>  R6            2.4.1       2019-11-12 [1] CRAN (R 4.0.0)                     
#>  Rcpp          1.0.5       2020-07-06 [1] CRAN (R 4.0.0)                     
#>  remotes       2.2.0       2020-07-21 [1] CRAN (R 4.0.2)                     
#>  rlang         0.4.8       2020-10-08 [1] CRAN (R 4.0.2)                     
#>  rmarkdown     2.3         2020-06-18 [1] CRAN (R 4.0.2)                     
#>  rprojroot     1.3.2.9000  2020-10-18 [1] local                              
#>  RSQLite       2.2.0       2020-01-07 [1] CRAN (R 4.0.0)                     
#>  sessioninfo   1.1.1       2018-11-05 [1] CRAN (R 4.0.0)                     
#>  stringi       1.5.3       2020-09-09 [1] CRAN (R 4.0.2)                     
#>  stringr       1.4.0       2019-02-10 [1] CRAN (R 4.0.0)                     
#>  testthat      2.3.2       2020-03-02 [1] CRAN (R 4.0.0)                     
#>  tibble        3.0.4       2020-10-12 [1] CRAN (R 4.0.2)                     
#>  tidyselect    1.1.0       2020-05-11 [1] CRAN (R 4.0.0)                     
#>  usethis     * 1.6.3       2020-09-17 [1] CRAN (R 4.0.2)                     
#>  vctrs         0.3.4       2020-08-29 [1] CRAN (R 4.0.2)                     
#>  withr         2.3.0       2020-09-22 [1] CRAN (R 4.0.2)                     
#>  xfun          0.18        2020-09-29 [1] CRAN (R 4.0.2)                     
#>  yaml          2.2.1       2020-02-01 [1] CRAN (R 4.0.0)                     
#> 
#> [1] /Library/Frameworks/R.framework/Versions/4.0/Resources/library

[hadley]

Somewhat more minimal reprex:

library(dbplyr)
library(dplyr, warn.conflicts = FALSE)

db <- memdb_frame(x = 1:5, y = 1:5)
db %>% mutate(across(everything(), ~log(.x)))
#> Error: Unsupported `.fns` for dbplyr::across()

^{Created on 2021-01-21 by the reprex package (v0.3.0.9001)}

[nviets]

I have the same issue with dbplyr:

tibble(x = 1:5, y = 1:5) %>% 
  summarise(across(where(is.numeric), ~min(.x, na.rm = TRUE)))
# A tibble: 1 x 2
#       x     y
#   <int> <int>
#  1     1     1

db <- memdb_frame(x = 1:5, y = 1:5)
db %>% summarise(across(where(is.numeric), ~min(.x, na.rm = TRUE)))
# Error: Can't rename variables in this context.
# Run `rlang::last_error()` to see where the error occurred.