BUG#16255: Post-review fixes: adjust the testcase.

mysql-test/r/subselect.result:
  BUG#16255: A proper testcase
mysql-test/t/subselect.test:
  BUG#16255: A proper testcase

mysql-test/r/subselect.result

@@ -2895,14 +2895,25 @@ select * from t1 where NOT(s1 = ALL (select s1/s1 from t1));
 s1
 2
 drop table t1;
-CREATE TABLE t1 (a INT, b INT, PRIMARY KEY (a,b));
-INSERT INTO t1 VALUES(26, 1), (48, 2);
-SELECT * FROM t1 r WHERE (r.a,r.b) IN (SELECT a,MAX(b) FROM t1 GROUP BY a);
-a	b
-26	1
-48	2
-SELECT * FROM t1 r WHERE (r.a,r.b) IN (SELECT a + 0,MAX(b) FROM t1 GROUP BY a);
-a	b
-26	1
-48	2
-DROP TABLE t1;
+create table t1 (
+retailerID varchar(8) NOT NULL,
+statusID   int(10) unsigned NOT NULL,
+changed    datetime NOT NULL,
+UNIQUE KEY retailerID (retailerID, statusID, changed)
+);
+INSERT INTO t1 VALUES("0026", "1", "2005-12-06 12:18:56");
+INSERT INTO t1 VALUES("0026", "2", "2006-01-06 12:25:53");
+INSERT INTO t1 VALUES("0037", "1", "2005-12-06 12:18:56");
+INSERT INTO t1 VALUES("0037", "2", "2006-01-06 12:25:53");
+INSERT INTO t1 VALUES("0048", "1", "2006-01-06 12:37:50");
+INSERT INTO t1 VALUES("0059", "1", "2006-01-06 12:37:50");
+select * from t1 r1 
+where (r1.retailerID,(r1.changed)) in 
+(SELECT r2.retailerId,(max(changed)) from t1 r2 
+group by r2.retailerId);
+retailerID	statusID	changed
+0026	2	2006-01-06 12:25:53
+0037	2	2006-01-06 12:25:53
+0048	1	2006-01-06 12:37:50
+0059	1	2006-01-06 12:37:50
+drop table t1;

mysql-test/t/subselect.test

@@ -1865,12 +1865,24 @@ drop table t1;
 #
 # Bug #16255: Subquery in where
 #
-CREATE TABLE t1 (a INT, b INT, PRIMARY KEY (a,b));
-
-INSERT INTO t1 VALUES(26, 1), (48, 2);
+create table t1 (
+  retailerID varchar(8) NOT NULL,
+  statusID   int(10) unsigned NOT NULL,
+  changed    datetime NOT NULL,
+  UNIQUE KEY retailerID (retailerID, statusID, changed)
+);
 
-SELECT * FROM t1 r WHERE (r.a,r.b) IN (SELECT a,MAX(b) FROM t1 GROUP BY a);
-SELECT * FROM t1 r WHERE (r.a,r.b) IN (SELECT a + 0,MAX(b) FROM t1 GROUP BY a);
+INSERT INTO t1 VALUES("0026", "1", "2005-12-06 12:18:56");
+INSERT INTO t1 VALUES("0026", "2", "2006-01-06 12:25:53");
+INSERT INTO t1 VALUES("0037", "1", "2005-12-06 12:18:56");
+INSERT INTO t1 VALUES("0037", "2", "2006-01-06 12:25:53");
+INSERT INTO t1 VALUES("0048", "1", "2006-01-06 12:37:50");
+INSERT INTO t1 VALUES("0059", "1", "2006-01-06 12:37:50");
+
+select * from t1 r1 
+  where (r1.retailerID,(r1.changed)) in 
+         (SELECT r2.retailerId,(max(changed)) from t1 r2 
+          group by r2.retailerId);
+drop table t1;
 
-DROP TABLE t1;
 # End of 4.1 tests