Manual merge

sql/item_cmpfunc.h:
  Auto merged

mysql-test/r/join_outer.result

@@ -889,3 +889,25 @@ a	b	a	b
 2	2	2	2
 NULL	NULL	3	3
 DROP TABLE t0,t1,t2,t3;
+CREATE TABLE t1 (a int PRIMARY KEY, b int);
+CREATE TABLE t2 (a int PRIMARY KEY, b int);
+INSERT INTO t1 VALUES (1,1), (2,1), (3,1), (4,2);
+INSERT INTO t2 VALUES (1,2), (2,2);
+SELECT * FROM t1 LEFT JOIN t2 ON t1.a=t2.a;
+a	b	a	b
+1	1	1	2
+2	1	2	2
+3	1	NULL	NULL
+4	2	NULL	NULL
+SELECT * FROM t1 LEFT JOIN t2 ON t1.a=t2.a WHERE t1.b=1;
+a	b	a	b
+1	1	1	2
+2	1	2	2
+3	1	NULL	NULL
+SELECT * FROM t1 LEFT JOIN t2 ON t1.a=t2.a
+WHERE t1.b=1 XOR (NOT ISNULL(t2.a) AND t2.b=1);
+a	b	a	b
+1	1	1	2
+2	1	2	2
+3	1	NULL	NULL
+DROP TABLE t1,t2;

mysql-test/t/join_outer.test

@@ -588,12 +588,6 @@ INSERT INTO t2 VALUES("0", "SV", "0-SV");
 INSERT INTO t2 VALUES("10", "EN", "10-EN");
 INSERT INTO t2 VALUES("10", "SV", "10-SV");
 
-SELECT t1.id, t1.text_id, t2.text_data
-  FROM t1 LEFT JOIN t2
-               ON t1.text_id = t2.text_id
-                  AND t2.language_id = 'SV'
-  WHERE (t1.id LIKE '%' OR t2.text_data LIKE '%');
-
 DROP TABLE t1, t2;
 
 # Test for bug #5896  
@@ -630,3 +624,22 @@ select * from t2 right join t1 on t2.a=t1.a;
 select straight_join * from t2 right join t1 on t2.a=t1.a;
 
 DROP TABLE t0,t1,t2,t3;
+
+#
+# Test for bug #9017: left join mistakingly converted to inner join
+#
+
+CREATE TABLE t1 (a int PRIMARY KEY, b int);
+CREATE TABLE t2 (a int PRIMARY KEY, b int);
+
+INSERT INTO t1 VALUES (1,1), (2,1), (3,1), (4,2);
+INSERT INTO t2 VALUES (1,2), (2,2);
+
+SELECT * FROM t1 LEFT JOIN t2 ON t1.a=t2.a;
+SELECT * FROM t1 LEFT JOIN t2 ON t1.a=t2.a WHERE t1.b=1;
+SELECT * FROM t1 LEFT JOIN t2 ON t1.a=t2.a
+  WHERE t1.b=1 XOR (NOT ISNULL(t2.a) AND t2.b=1);
+
+DROP TABLE t1,t2;
+
+

sql/item_cmpfunc.h

@@ -1234,6 +1234,7 @@ public:
   enum Type type() const { return FUNC_ITEM; }
   longlong val_int();
   const char *func_name() const { return "xor"; }
+  table_map not_null_tables() const { return and_tables_cache; }
 };