Group a vectra query by columns

Usage

group_by(.data, ..., .add = FALSE)

.data: A vectra_node object.
...: Grouping columns. Bare column names, injected symbols (!!rlang::sym(k), !!!rlang::syms(ks)), the .data pronoun (.data[[k]]), across()/pick() with a tidyselect selection (across(all_of(ks))), or expressions, which add a computed column first (group_by(decade = year %/% 10); an unnamed expression is named after its text, as in dplyr).
.add: If FALSE (default), replace the existing grouping; if TRUE, add to it.

A vectra_node with grouping information stored.

f <- tempfile(fileext = ".vtr")
write_vtr(mtcars, f)
tbl(f) |> group_by(cyl) |> summarise(avg = mean(mpg)) |> collect()
unlink(f)