Merge dl145s.mysql.com:/data/bk/team_tree_merge/MERGE/mysql-4.1-opt

into  dl145s.mysql.com:/data/bk/team_tree_merge/MERGE/mysql-5.0-opt


mysql-test/r/subselect.result:
  SCCS merged
mysql-test/t/subselect.test:
  SCCS merged

1 files changed, 26 insertions, 0 deletions

diff --git a/mysql-test/t/subselect.test b/mysql-test/t/subselect.test
index 740cb08c5bd..a4e535ac418 100644
--- a/mysql-test/t/subselect.test
+++ b/mysql-test/t/subselect.test
@@ -1892,6 +1892,32 @@ select * from t1 r1
           group by r2.retailerId);
 drop table t1;
 
+#
+# Bug #21180: Subselect with index for both WHERE and ORDER BY 
+#             produces empty result
+#
+create table t1(a int, primary key (a));
+insert into t1 values (10);
+
+create table t2 (a int primary key, b varchar(32), c int, unique key b(c, b));
+insert into t2(a, c, b) values (1,10,'359'), (2,10,'35988'), (3,10,'35989');
+
+explain SELECT sql_no_cache t1.a, r.a, r.b FROM t1 LEFT JOIN t2 r 
+  ON r.a = (SELECT t2.a FROM t2 WHERE t2.c = t1.a AND t2.b <= '359899' 
+             ORDER BY t2.c DESC, t2.b DESC LIMIT 1) WHERE t1.a = 10;
+SELECT sql_no_cache t1.a, r.a, r.b FROM t1 LEFT JOIN t2 r 
+  ON r.a = (SELECT t2.a FROM t2 WHERE t2.c = t1.a AND t2.b <= '359899' 
+            ORDER BY t2.c DESC, t2.b DESC LIMIT 1) WHERE t1.a = 10;
+
+explain SELECT sql_no_cache t1.a, r.a, r.b FROM t1 LEFT JOIN t2 r 
+  ON r.a = (SELECT t2.a FROM t2 WHERE t2.c = t1.a AND t2.b <= '359899' 
+            ORDER BY t2.c, t2.b LIMIT 1) WHERE t1.a = 10;
+SELECT sql_no_cache t1.a, r.a, r.b FROM t1 LEFT JOIN t2 r 
+  ON r.a = (SELECT t2.a FROM t2 WHERE t2.c = t1.a AND t2.b <= '359899' 
+            ORDER BY t2.c, t2.b LIMIT 1) WHERE t1.a = 10;
+
+drop table t1,t2;
+
 # End of 4.1 tests
 
 #