order by vcol test fixups

mysql-test/suite/vcol/r/order_by_subst.result

@@ -89,3 +89,46 @@ vc
 2
 2
 drop table t;
+create table t (c int);
+insert into t select seq from seq_1_to_10000;
+alter table t
+add column vc1 int as (c + 1);
+alter table t
+add column vc2 int as (1 - c),
+add index(vc1, vc2);
+explain select vc1, vc2 from t order by c + 1, 1 - c;
+id	select_type	table	type	possible_keys	key	key_len	ref	rows	Extra
+1	SIMPLE	t	ALL	NULL	NULL	NULL	NULL	10000	Using filesort
+drop table t;
+create table t (c int, key (c));
+insert into t select seq from seq_1_to_10000;
+alter table t
+add column vc1 int as (c + 1),
+add index(vc1);
+alter table t
+add column vc2 int as (1 - c),
+add index(vc2);
+set @old_optimizer_trace=@@optimizer_trace;
+set optimizer_trace=1;
+explain select * from t order by c + 1, 1 - c;
+id	select_type	table	type	possible_keys	key	key_len	ref	rows	Extra
+1	SIMPLE	t	index	NULL	c	5	NULL	10000	Using index; Using filesort
+select
+json_detailed(json_extract(trace, '$**.virtual_column_substitution'))
+from
+information_schema.optimizer_trace;
+json_detailed(json_extract(trace, '$**.virtual_column_substitution'))
+[
+    {
+        "location": "ORDER BY",
+        "from": "t.c + 1",
+        "to": "t.vc1"
+    },
+    {
+        "location": "ORDER BY",
+        "from": "1 - t.c",
+        "to": "t.vc2"
+    }
+]
+set optimizer_trace=@old_optimizer_trace;
+drop table t;