This is a method for the dplyr pull()
generic. It evaluates the query
retrieving just the specified column.
# S3 method for tbl_sql pull(.data, var = -1)
.data | A lazy data frame backed by a database query. |
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var | A variable specified as:
The default returns the last column (on the assumption that's the column you've created most recently). This argument is taken by expression and supports quasiquotation (you can unquote column names and column locations). |
A vector of data.
library(dplyr, warn.conflicts = FALSE) db <- memdb_frame(x = 1:5, y = 5:1) db %>% mutate(z = x + y * 2) %>% pull()#> [1] 11 10 9 8 7