Fixed LP bug #881449.

The function SELECT_LEX::update_used_tables first must clean up
all bitmaps to be recalculated for all tables that require it
and only after this walk through on conditions attached to the
tables to update these bitmaps.
  

mysql-test/r/derived_view.result

@@ -1741,4 +1741,27 @@ a	b
 SET SESSION join_cache_level = default;
 DROP VIEW v2;
 DROP TABLE t1,t2,t3;
+#
+# Bug #881449: OUTER JOIN usin  a merged view within IN subquery
+#
+CREATE TABLE t1 (a varchar(1)) ;
+INSERT INTO t1 VALUES ('y'), ('x');
+CREATE TABLE t2 (a int, PRIMARY KEY (a)) ;
+INSERT INTO t2 VALUES (1), (2);
+CREATE TABLE t3 (a int, b varchar(1)) ;
+INSERT INTO t3 VALUES (1,'x');
+CREATE VIEW v3 AS SELECT * FROM t3;
+SET SESSION optimizer_switch='semijoin=on';
+EXPLAIN 
+SELECT * FROM t1 WHERE a IN (SELECT v3.b FROM t2 RIGHT JOIN v3 ON v3.a = t2.a);
+id	select_type	table	type	possible_keys	key	key_len	ref	rows	Extra
+1	PRIMARY	t3	system	NULL	NULL	NULL	NULL	1	
+1	PRIMARY	t2	const	PRIMARY	PRIMARY	4	const	1	Using index
+1	PRIMARY	t1	ALL	NULL	NULL	NULL	NULL	2	Using where
+SELECT * FROM t1 WHERE a IN (SELECT v3.b FROM t2 RIGHT JOIN v3 ON v3.a = t2.a);
+a
+x
+set optimizer_switch= @save_optimizer_switch;
+DROP VIEW v3;
+DROP TABLE t1,t2,t3;
 set optimizer_switch=@exit_optimizer_switch;

mysql-test/t/derived_view.test

@@ -1140,5 +1140,31 @@ SET SESSION join_cache_level = default;
 DROP VIEW v2;
 DROP TABLE t1,t2,t3;
 
+--echo #
+--echo # Bug #881449: OUTER JOIN usin  a merged view within IN subquery
+--echo #
+
+CREATE TABLE t1 (a varchar(1)) ;
+INSERT INTO t1 VALUES ('y'), ('x');
+
+CREATE TABLE t2 (a int, PRIMARY KEY (a)) ;
+INSERT INTO t2 VALUES (1), (2);
+
+CREATE TABLE t3 (a int, b varchar(1)) ;
+INSERT INTO t3 VALUES (1,'x');
+
+CREATE VIEW v3 AS SELECT * FROM t3;
+
+SET SESSION optimizer_switch='semijoin=on';
+
+EXPLAIN 
+SELECT * FROM t1 WHERE a IN (SELECT v3.b FROM t2 RIGHT JOIN v3 ON v3.a = t2.a);
+SELECT * FROM t1 WHERE a IN (SELECT v3.b FROM t2 RIGHT JOIN v3 ON v3.a = t2.a);
+
+set optimizer_switch= @save_optimizer_switch;
+
+DROP VIEW v3;
+DROP TABLE t1,t2,t3;
+
 # The following command must be the last one the file 
 set optimizer_switch=@exit_optimizer_switch;

sql/sql_lex.cc

@@ -3408,12 +3408,12 @@ void SELECT_LEX::update_used_tables()
 {
   TABLE_LIST *tl;
   List_iterator<TABLE_LIST> ti(leaf_tables);
+
   while ((tl= ti++))
   {
-    TABLE_LIST *embedding;
     if (tl->table && !tl->is_view_or_derived())
     {
-      embedding= tl->embedding;
+      TABLE_LIST *embedding= tl->embedding;
       for (embedding= tl->embedding; embedding; embedding=embedding->embedding)
       {
         if (embedding->is_view_or_derived())
@@ -3429,7 +3429,12 @@ void SELECT_LEX::update_used_tables()
         }
       }
     }
-    embedding= tl;
+  }
+
+  ti.rewind();
+  while ((tl= ti++))
+  {
+    TABLE_LIST *embedding= tl;
     do
     {
       bool maybe_null;
@@ -3458,6 +3463,7 @@ void SELECT_LEX::update_used_tables()
       embedding= tl->embedding;
     }
   }
+
   if (join->conds)
   {
     join->conds->update_used_tables();