distinct.result:

  Adjustment of the result file after the revision of the fix for bug #7520.

mysql-test/r/distinct.result

@@ -190,7 +190,7 @@ insert into t3 select * from t4;
 explain select distinct t1.a from t1,t3 where t1.a=t3.a;
 table	type	possible_keys	key	key_len	ref	rows	Extra
 t1	index	PRIMARY	PRIMARY	4	NULL	4	Using index; Using temporary
-t3	ref	a	a	5	t1.a	10	Using where; Using index; Distinct
+t3	ref	a	a	5	t1.a	12	Using where; Using index; Distinct
 select distinct t1.a from t1,t3 where t1.a=t3.a;
 a
 1