qb: tuple support

qb/update_test.go

@@ -43,6 +43,13 @@ func TestUpdateBuilder(t *testing.T) {
 			S: "UPDATE cycling.cyclist_name SET user_uuid=literal_uuid,stars=? WHERE id=? ",
 			N: []string{"stars", "expr"},
 		},
+
+		// Add SET tuple
+		{
+			B: Update("cycling.cyclist_name").SetTuple("id", 2).Set("user_uuid", "firstname").Where(EqTuple("id", 2)),
+			S: "UPDATE cycling.cyclist_name SET id=(?,?),user_uuid=?,firstname=? WHERE id=(?,?) ",
+			N: []string{"id", "user_uuid", "firstname", "id"},
+		},
 		// Add SET SetFunc
 		{
 			B: Update("cycling.cyclist_name").SetFunc("user_uuid", Fn("someFunc", "param_0", "param_1")).Where(w).Set("stars"),