Merge macbook.gmz:/Users/kgeorge/mysql/work/mysql-5.0-opt

into  macbook.gmz:/Users/kgeorge/mysql/work/merge-5.1-opt

1 files changed, 36 insertions, 0 deletions

diff --git a/mysql-test/t/func_in.test b/mysql-test/t/func_in.test
index ee344d0958b..db730cf1828 100644
--- a/mysql-test/t/func_in.test
+++ b/mysql-test/t/func_in.test
@@ -254,6 +254,42 @@ select some_id from t1 where some_id not in(-4,-1,-4);
 select some_id from t1 where some_id not in(-4,-1,3423534,2342342);
 drop table t1;
 
+#
+# BUG#20420: optimizer reports wrong keys on left join with IN
+#
+CREATE TABLE t1 (a int, b int, PRIMARY KEY (a));
+INSERT INTO t1 VALUES (1,1),(2,1),(3,1),(4,1),(5,1),(6,1);
+
+CREATE TABLE t2 (a int, b int, PRIMARY KEY (a));
+INSERT INTO t2 VALUES (3,2),(4,2);
+
+CREATE TABLE t3 (a int PRIMARY KEY);
+INSERT INTO t3 VALUES (1),(2),(3),(4);
+
+CREATE TABLE t4 (a int PRIMARY KEY);
+INSERT INTO t4 VALUES (1),(2);
+
+EXPLAIN SELECT STRAIGHT_JOIN * FROM t3 
+  JOIN t1 ON t3.a=t1.a 
+  JOIN t2 ON t3.a=t2.a
+  JOIN t4 WHERE t4.a IN (t1.b, t2.b);
+
+SELECT STRAIGHT_JOIN * FROM t3 
+  JOIN t1 ON t3.a=t1.a 
+  JOIN t2 ON t3.a=t2.a
+  JOIN t4 WHERE t4.a IN (t1.b, t2.b);
+
+EXPLAIN SELECT STRAIGHT_JOIN 
+   (SELECT SUM(t4.a) FROM t4 WHERE t4.a IN (t1.b, t2.b)) 
+  FROM t3, t1, t2
+  WHERE t3.a=t1.a AND t3.a=t2.a;
+
+SELECT STRAIGHT_JOIN 
+   (SELECT SUM(t4.a) FROM t4 WHERE t4.a IN (t1.b, t2.b)) 
+  FROM t3, t1, t2
+  WHERE t3.a=t1.a AND t3.a=t2.a;
+
+DROP TABLE t1,t2,t3,t4;  
 
 --echo End of 5.0 tests