ianmcook commented on a change in pull request #9586: URL: https://github.com/apache/arrow/pull/9586#discussion_r588604176
########## File path: r/R/dplyr.R ########## @@ -539,6 +537,13 @@ mutate.arrow_dplyr_query <- function(.data, if (inherits(results[[new_var]], "try-error")) { msg <- paste('Expression', as_label(exprs[[i]]), 'not supported in Arrow') return(abandon_ship(call, .data, msg)) + } else if (is_dataset && !inherits(results[[new_var]], "Expression")) { + # We need some wrapping to handle literal values + if (length(results[[new_var]]) != 1) { + msg <- paste0('In ', new_var, " = ", as_label(exprs[[i]]), ", only values of size one are recycled") Review comment: P.S. named `NULL` should behave the same, e.g. `mutate(x = NULL, y = NULL, z = NULL)` should do the same as `mutate()` ---------------------------------------------------------------- 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. For queries about this service, please contact Infrastructure at: us...@infra.apache.org