ozankabak commented on code in PR #5559:
URL: https://github.com/apache/arrow-datafusion/pull/5559#discussion_r1139325692
##########
datafusion/expr/src/utils.rs:
##########
@@ -69,6 +69,94 @@ pub fn grouping_set_expr_count(group_expr: &[Expr]) ->
Result<usize> {
}
}
+fn powerset<T>(slice: &[T]) -> Vec<Vec<&T>> {
Review Comment:
There is a power set implementation in
[itertools](https://docs.rs/itertools/latest/itertools/trait.Itertools.html#method.powerset),
did you consider using it?
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