update

src/query/sql/src/planner/binder/aggregate.rs

@@ -462,21 +462,9 @@ impl Binder {
 
     /// Generate GroupingSets from CUBE (expr1, expr2, ...)
     fn generate_cube_sets(exprs: Vec<Expr>) -> Vec<Vec<Expr>> {
-        let mut result = Vec::new();
-        let n = exprs.len();
-
-        // Iterate through all possible subsets of the given expressions
-        for i in 0..(1 << n) {
-            let mut subset = Vec::new();
-            for (j, expr) in exprs.iter().enumerate() {
-                if (i & (1 << j)) != 0 {
-                    subset.push(expr.clone());
-                }
-            }
-            result.push(subset);
-        }
-
-        result
+        (0..=exprs.len())
+            .flat_map(|count| exprs.clone().into_iter().combinations(count))
+            .collect::<Vec<_>>()
     }
 
     /// Generate GroupingSets from ROLLUP (expr1, expr2, ...)