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From dbplyr experience, folks want to be able to do stuff like `across(which(is.numeric), mean)`, which you can't do currently because dplyr doesn't know the co
by hadley 5y ago
From dbplyr experience, folks want to be able to do stuff like `across(which(is.numeric), mean)`, which you can't do currently because dplyr doesn't know the column types (although it does maintain a list of the column names).
- maximilianroos 5y agoYes, that's a good example. Indeed — often SQL doesn't know the column _names_, let alone the types. So for cross-column selection (e.g. `across`), this does become necessary.