Merge.

mysql-test/r/derived_view.result

@@ -848,3 +848,55 @@ Warnings:
 Note	1003	select `test`.`t3`.`b` AS `b`,`test`.`t1`.`a` AS `a` from `test`.`t3` left join (`test`.`t2` join `test`.`t1`) on((`test`.`t3`.`a` <> 0)) where ((`test`.`t1`.`a` = `test`.`t1`.`a`) or (`test`.`t3`.`b` <> 0))
 DROP VIEW v1;
 DROP TABLE t1,t2,t3;
+#
+# LP bug #806510: subquery with outer reference
+#                 to a derived_table/view                    
+#
+CREATE TABLE t1 (a int) ;
+INSERT INTO t1 VALUES (4), (NULL);
+CREATE TABLE t2 (a int) ;
+INSERT INTO t2 VALUES (8), (0);
+CREATE TABLE t3 (a int, b int) ;
+INSERT INTO t3 VALUES (7,8);
+CREATE VIEW v1 AS SELECT * FROM t1;
+SELECT * FROM  t1 t
+WHERE EXISTS (SELECT t3.a FROM t3, t2
+WHERE t2.a = t3.b AND t.a != 0);
+a
+4
+EXPLAIN
+SELECT * FROM  t1 t
+WHERE EXISTS (SELECT t3.a FROM t3, t2
+WHERE t2.a = t3.b AND t.a != 0);
+id	select_type	table	type	possible_keys	key	key_len	ref	rows	Extra
+1	PRIMARY	t	ALL	NULL	NULL	NULL	NULL	2	Using where
+2	DEPENDENT SUBQUERY	t3	system	NULL	NULL	NULL	NULL	1	
+2	DEPENDENT SUBQUERY	t2	ALL	NULL	NULL	NULL	NULL	2	Using where
+SELECT * FROM (SELECT * FROM t1) t
+WHERE EXISTS (SELECT t3.a FROM t3, t2
+WHERE t2.a = t3.b AND t.a != 0);
+a
+4
+EXPLAIN
+SELECT * FROM (SELECT * FROM t1) t
+WHERE EXISTS (SELECT t3.a FROM t3, t2
+WHERE t2.a = t3.b AND t.a != 0);
+id	select_type	table	type	possible_keys	key	key_len	ref	rows	Extra
+1	PRIMARY	t1	ALL	NULL	NULL	NULL	NULL	2	Using where
+3	DEPENDENT SUBQUERY	t3	system	NULL	NULL	NULL	NULL	1	
+3	DEPENDENT SUBQUERY	t2	ALL	NULL	NULL	NULL	NULL	2	Using where
+SELECT * FROM v1 t
+WHERE EXISTS (SELECT t3.a FROM t3, t2
+WHERE t2.a = t3.b AND t.a != 0);
+a
+4
+EXPLAIN
+SELECT * FROM v1 t
+WHERE EXISTS (SELECT t3.a FROM t3, t2
+WHERE t2.a = t3.b AND t.a != 0);
+id	select_type	table	type	possible_keys	key	key_len	ref	rows	Extra
+1	PRIMARY	t1	ALL	NULL	NULL	NULL	NULL	2	Using where
+2	DEPENDENT SUBQUERY	t3	system	NULL	NULL	NULL	NULL	1	
+2	DEPENDENT SUBQUERY	t2	ALL	NULL	NULL	NULL	NULL	2	Using where
+DROP VIEW v1;
+DROP TABLE t1,t2,t3;

mysql-test/r/join_cache.result

@@ -3033,7 +3033,7 @@ t6.formattypeid IN (2) AND (t3.formatid IN (31, 8, 76)) AND
 t1.metaid = t2.metaid AND t1.affiliateid = '2';
 id	select_type	table	type	possible_keys	key	key_len	ref	rows	Extra
 1	SIMPLE	t6	system	PRIMARY	NULL	NULL	NULL	1	
-1	SIMPLE	t1	ref	t1_affiliateid,t1_metaid	t1_affiliateid	4	const	1	Using index condition
+1	SIMPLE	t1	ref	t1_affiliateid,t1_metaid	t1_affiliateid	4	const	1	
 1	SIMPLE	t4	ref	PRIMARY,t4_formatclassid,t4_formats_idx	t4_formats_idx	1	const	1	Using index condition; Using where; Using join buffer (flat, BKA join); Key-ordered Rowid-ordered scan
 1	SIMPLE	t5	eq_ref	PRIMARY,t5_formattypeid	PRIMARY	4	test.t4.formatclassid	1	Using where; Using join buffer (incremental, BKA join); Key-ordered Rowid-ordered scan
 1	SIMPLE	t2	eq_ref	PRIMARY	PRIMARY	4	test.t1.metaid	1	Using join buffer (incremental, BKA join); Key-ordered Rowid-ordered scan

mysql-test/t/derived_view.test

@@ -460,3 +460,46 @@ SELECT t3.b, v1.a
 
 DROP VIEW v1;
 DROP TABLE t1,t2,t3;
+
+--echo #
+--echo # LP bug #806510: subquery with outer reference
+--echo #                 to a derived_table/view                    
+--echo #
+
+CREATE TABLE t1 (a int) ;
+INSERT INTO t1 VALUES (4), (NULL);
+
+CREATE TABLE t2 (a int) ;
+INSERT INTO t2 VALUES (8), (0);
+
+CREATE TABLE t3 (a int, b int) ;
+INSERT INTO t3 VALUES (7,8);
+
+CREATE VIEW v1 AS SELECT * FROM t1;
+
+SELECT * FROM  t1 t
+  WHERE EXISTS (SELECT t3.a FROM t3, t2
+                  WHERE t2.a = t3.b AND t.a != 0);
+EXPLAIN
+SELECT * FROM  t1 t
+  WHERE EXISTS (SELECT t3.a FROM t3, t2
+                  WHERE t2.a = t3.b AND t.a != 0);
+
+SELECT * FROM (SELECT * FROM t1) t
+  WHERE EXISTS (SELECT t3.a FROM t3, t2
+                  WHERE t2.a = t3.b AND t.a != 0);
+EXPLAIN
+SELECT * FROM (SELECT * FROM t1) t
+  WHERE EXISTS (SELECT t3.a FROM t3, t2
+                  WHERE t2.a = t3.b AND t.a != 0);
+
+SELECT * FROM v1 t
+  WHERE EXISTS (SELECT t3.a FROM t3, t2
+                  WHERE t2.a = t3.b AND t.a != 0);
+EXPLAIN
+SELECT * FROM v1 t
+  WHERE EXISTS (SELECT t3.a FROM t3, t2
+                  WHERE t2.a = t3.b AND t.a != 0);
+
+DROP VIEW v1;
+DROP TABLE t1,t2,t3;

sql/item.cc

@@ -7527,7 +7527,7 @@ Item *Item_direct_view_ref::replace_equal_field(uchar *arg)
   field_item->set_item_equal(item_equal);
   Item *item= field_item->replace_equal_field(arg);
   field_item->set_item_equal(0);
-  return item;
+  return item != field_item ? item : this;
 }
 
 

sql/sql_select.cc

@@ -7383,7 +7383,7 @@ get_store_key(THD *thd, KEYUSE *keyuse, table_map used_tables,
 			       maybe_null ? key_buff : 0,
 			       key_part->length,
 			       ((Item_field*) keyuse->val->real_item())->field,
-			       keyuse->val->full_name());
+			       keyuse->val->real_item()->full_name());
   return new store_key_item(thd,
 			    key_part->field,
 			    key_buff + maybe_null,
@@ -16512,7 +16512,8 @@ bool test_if_ref(Item *root_cond, Item_field *left_item,Item *right_item)
     }
 
     Item *ref_item=part_of_refkey(field->table,field);
-    if (ref_item && ref_item->eq(right_item,1))
+    if (ref_item && (ref_item->eq(right_item,1) || 
+		     ref_item->real_item()->eq(right_item,1)))
     {
       right_item= right_item->real_item();
       if (right_item->type() == Item::FIELD_ITEM)