diff --git a/mysql-test/r/subselect.result b/mysql-test/r/subselect.result
index 3b18a4d0262..85519828b14 100644
--- a/mysql-test/r/subselect.result
+++ b/mysql-test/r/subselect.result
@@ -7204,3 +7204,17 @@ f1	f2	f3
 DROP TABLE t1, t2;
 SET NAMES default;
 End of 10.1 tests
+#
+# MDEV-12564: IN TO EXISTS transformation for rows after 
+#             conversion an outer join to inner join
+#
+CREATE TABLE t (
+pk int PRIMARY KEY, i int NOT NULL, c varchar(8), KEY(c)
+) ENGINE=MyISAM;
+INSERT INTO t VALUES (1,10,'foo'),(2,20,'bar');
+SELECT * FROM t t1 RIGHT JOIN t t2 ON (t2.pk = t1.pk)
+WHERE (t2.i, t2.pk) NOT IN ( SELECT t3.i, t3.i FROM t t3, t t4 ) AND t1.c = 'foo';
+pk	i	c	pk	i	c
+1	10	foo	1	10	foo
+DROP TABLE t;
+End of 10.2 tests
diff --git a/mysql-test/r/subselect_no_exists_to_in.result b/mysql-test/r/subselect_no_exists_to_in.result
index ecefc0b8883..deffc030d6b 100644
--- a/mysql-test/r/subselect_no_exists_to_in.result
+++ b/mysql-test/r/subselect_no_exists_to_in.result
@@ -7204,6 +7204,20 @@ f1	f2	f3
 DROP TABLE t1, t2;
 SET NAMES default;
 End of 10.1 tests
+#
+# MDEV-12564: IN TO EXISTS transformation for rows after 
+#             conversion an outer join to inner join
+#
+CREATE TABLE t (
+pk int PRIMARY KEY, i int NOT NULL, c varchar(8), KEY(c)
+) ENGINE=MyISAM;
+INSERT INTO t VALUES (1,10,'foo'),(2,20,'bar');
+SELECT * FROM t t1 RIGHT JOIN t t2 ON (t2.pk = t1.pk)
+WHERE (t2.i, t2.pk) NOT IN ( SELECT t3.i, t3.i FROM t t3, t t4 ) AND t1.c = 'foo';
+pk	i	c	pk	i	c
+1	10	foo	1	10	foo
+DROP TABLE t;
+End of 10.2 tests
 set optimizer_switch=default;
 select @@optimizer_switch like '%exists_to_in=off%';
 @@optimizer_switch like '%exists_to_in=off%'
diff --git a/mysql-test/r/subselect_no_mat.result b/mysql-test/r/subselect_no_mat.result
index 49a60546b78..202faf7f522 100644
--- a/mysql-test/r/subselect_no_mat.result
+++ b/mysql-test/r/subselect_no_mat.result
@@ -7197,6 +7197,20 @@ f1	f2	f3
 DROP TABLE t1, t2;
 SET NAMES default;
 End of 10.1 tests
+#
+# MDEV-12564: IN TO EXISTS transformation for rows after 
+#             conversion an outer join to inner join
+#
+CREATE TABLE t (
+pk int PRIMARY KEY, i int NOT NULL, c varchar(8), KEY(c)
+) ENGINE=MyISAM;
+INSERT INTO t VALUES (1,10,'foo'),(2,20,'bar');
+SELECT * FROM t t1 RIGHT JOIN t t2 ON (t2.pk = t1.pk)
+WHERE (t2.i, t2.pk) NOT IN ( SELECT t3.i, t3.i FROM t t3, t t4 ) AND t1.c = 'foo';
+pk	i	c	pk	i	c
+1	10	foo	1	10	foo
+DROP TABLE t;
+End of 10.2 tests
 set optimizer_switch=default;
 select @@optimizer_switch like '%materialization=on%';
 @@optimizer_switch like '%materialization=on%'
diff --git a/mysql-test/r/subselect_no_opts.result b/mysql-test/r/subselect_no_opts.result
index 304a427df6b..294107ef69e 100644
--- a/mysql-test/r/subselect_no_opts.result
+++ b/mysql-test/r/subselect_no_opts.result
@@ -7195,4 +7195,18 @@ f1	f2	f3
 DROP TABLE t1, t2;
 SET NAMES default;
 End of 10.1 tests
+#
+# MDEV-12564: IN TO EXISTS transformation for rows after 
+#             conversion an outer join to inner join
+#
+CREATE TABLE t (
+pk int PRIMARY KEY, i int NOT NULL, c varchar(8), KEY(c)
+) ENGINE=MyISAM;
+INSERT INTO t VALUES (1,10,'foo'),(2,20,'bar');
+SELECT * FROM t t1 RIGHT JOIN t t2 ON (t2.pk = t1.pk)
+WHERE (t2.i, t2.pk) NOT IN ( SELECT t3.i, t3.i FROM t t3, t t4 ) AND t1.c = 'foo';
+pk	i	c	pk	i	c
+1	10	foo	1	10	foo
+DROP TABLE t;
+End of 10.2 tests
 set @optimizer_switch_for_subselect_test=null;
diff --git a/mysql-test/r/subselect_no_scache.result b/mysql-test/r/subselect_no_scache.result
index c045be5197c..b9c06cae5bd 100644
--- a/mysql-test/r/subselect_no_scache.result
+++ b/mysql-test/r/subselect_no_scache.result
@@ -7210,6 +7210,20 @@ f1	f2	f3
 DROP TABLE t1, t2;
 SET NAMES default;
 End of 10.1 tests
+#
+# MDEV-12564: IN TO EXISTS transformation for rows after 
+#             conversion an outer join to inner join
+#
+CREATE TABLE t (
+pk int PRIMARY KEY, i int NOT NULL, c varchar(8), KEY(c)
+) ENGINE=MyISAM;
+INSERT INTO t VALUES (1,10,'foo'),(2,20,'bar');
+SELECT * FROM t t1 RIGHT JOIN t t2 ON (t2.pk = t1.pk)
+WHERE (t2.i, t2.pk) NOT IN ( SELECT t3.i, t3.i FROM t t3, t t4 ) AND t1.c = 'foo';
+pk	i	c	pk	i	c
+1	10	foo	1	10	foo
+DROP TABLE t;
+End of 10.2 tests
 set optimizer_switch=default;
 select @@optimizer_switch like '%subquery_cache=on%';
 @@optimizer_switch like '%subquery_cache=on%'
diff --git a/mysql-test/r/subselect_no_semijoin.result b/mysql-test/r/subselect_no_semijoin.result
index 3440ecbc6c1..e90d70fcc49 100644
--- a/mysql-test/r/subselect_no_semijoin.result
+++ b/mysql-test/r/subselect_no_semijoin.result
@@ -7195,5 +7195,19 @@ f1	f2	f3
 DROP TABLE t1, t2;
 SET NAMES default;
 End of 10.1 tests
+#
+# MDEV-12564: IN TO EXISTS transformation for rows after 
+#             conversion an outer join to inner join
+#
+CREATE TABLE t (
+pk int PRIMARY KEY, i int NOT NULL, c varchar(8), KEY(c)
+) ENGINE=MyISAM;
+INSERT INTO t VALUES (1,10,'foo'),(2,20,'bar');
+SELECT * FROM t t1 RIGHT JOIN t t2 ON (t2.pk = t1.pk)
+WHERE (t2.i, t2.pk) NOT IN ( SELECT t3.i, t3.i FROM t t3, t t4 ) AND t1.c = 'foo';
+pk	i	c	pk	i	c
+1	10	foo	1	10	foo
+DROP TABLE t;
+End of 10.2 tests
 set @optimizer_switch_for_subselect_test=null;
 set @join_cache_level_for_subselect_test=NULL;
diff --git a/mysql-test/t/subselect.test b/mysql-test/t/subselect.test
index f2e0adf9d53..282013222de 100644
--- a/mysql-test/t/subselect.test
+++ b/mysql-test/t/subselect.test
@@ -6056,3 +6056,20 @@ DROP TABLE t1, t2;
 SET NAMES default;
 
 --echo End of 10.1 tests
+
+--echo #
+--echo # MDEV-12564: IN TO EXISTS transformation for rows after 
+--echo #             conversion an outer join to inner join
+--echo #
+
+CREATE TABLE t (
+pk int PRIMARY KEY, i int NOT NULL, c varchar(8), KEY(c)
+) ENGINE=MyISAM;
+INSERT INTO t VALUES (1,10,'foo'),(2,20,'bar');
+ 
+SELECT * FROM t t1 RIGHT JOIN t t2 ON (t2.pk = t1.pk)
+  WHERE (t2.i, t2.pk) NOT IN ( SELECT t3.i, t3.i FROM t t3, t t4 ) AND t1.c = 'foo';
+
+DROP TABLE t;
+
+--echo End of 10.2 tests
diff --git a/sql/item_subselect.cc b/sql/item_subselect.cc
index d144dddf764..5f15e386b8d 100644
--- a/sql/item_subselect.cc
+++ b/sql/item_subselect.cc
@@ -2388,7 +2388,8 @@ Item_in_subselect::create_row_in_to_exists_cond(JOIN * join,
                                   (char *)"<list ref>"));
       Item *col_item= new (thd->mem_root)
         Item_cond_or(thd, item_eq, item_isnull);
-      if (!abort_on_null && left_expr->element_index(i)->maybe_null)
+      if (!abort_on_null && left_expr->element_index(i)->maybe_null &&
+          get_cond_guard(i))
       {
         disable_cond_guard_for_const_null_left_expr(i);
         if (!(col_item= new (thd->mem_root)
@@ -2406,7 +2407,8 @@ Item_in_subselect::create_row_in_to_exists_cond(JOIN * join,
                                        ref_pointer_array[i],
                                        (char *)"<no matter>",
                                        (char *)"<list ref>"));
-      if (!abort_on_null && left_expr->element_index(i)->maybe_null)
+      if (!abort_on_null && left_expr->element_index(i)->maybe_null &&
+          get_cond_guard(i) )
       {
         disable_cond_guard_for_const_null_left_expr(i);
         if (!(item_nnull_test= 
@@ -2467,7 +2469,7 @@ Item_in_subselect::create_row_in_to_exists_cond(JOIN * join,
                                            (char *)"<no matter>",
                                            (char *)"<list ref>"));
         item= new (thd->mem_root) Item_cond_or(thd, item, item_isnull);
-        if (left_expr->element_index(i)->maybe_null)
+        if (left_expr->element_index(i)->maybe_null && get_cond_guard(i))
         {
           disable_cond_guard_for_const_null_left_expr(i);
           if (!(item= new (thd->mem_root)
@@ -2479,7 +2481,8 @@ Item_in_subselect::create_row_in_to_exists_cond(JOIN * join,
         }
         *having_item= and_items(thd, *having_item, having_col_item);
       }
-      if (!abort_on_null && left_expr->element_index(i)->maybe_null)
+      if (!abort_on_null && left_expr->element_index(i)->maybe_null &&
+          get_cond_guard(i))
       {
         if (!(item= new (thd->mem_root)
               Item_func_trig_cond(thd, item, get_cond_guard(i))))