diff --git a/mysql-test/main/subselect4.result b/mysql-test/main/subselect4.result
index 9f435146e0b..4edcffa0ee5 100644
--- a/mysql-test/main/subselect4.result
+++ b/mysql-test/main/subselect4.result
@@ -3213,4 +3213,83 @@ FROM x
 )
 );
 ERROR 21000: Operand should contain 2 column(s)
+#
+# MDEV-29362: Constant subquery used as left part of IN subquery
+#
+CREATE TABLE t1 (a int) ENGINE=MyISAM;
+INSERT INTO t1 VALUES (15), (1), (2);
+CREATE TABLE t2 (b int) ENGINE=MyISAM;
+INSERT INTO t2 VALUES (15), (1);
+CREATE TABLE t3 (c int) ENGINE=MyISAM;
+INSERT INTO t3 VALUES (15), (1);
+SET optimizer_switch='condition_pushdown_from_having=off';
+SELECT a FROM t1 GROUP BY a
+HAVING a = ( (SELECT b FROM t2 where b=1) IN (SELECT c FROM t3)  ) + 1;
+a
+2
+SELECT a FROM t1 GROUP BY a
+HAVING a IN ( (SELECT b FROM t2 where b=1) IN (SELECT c FROM t3)  );
+a
+1
+SET optimizer_switch='condition_pushdown_from_having=on';
+SELECT a FROM t1 GROUP BY a
+HAVING a = ( (SELECT b FROM t2 where b=1) IN (SELECT c FROM t3)  ) + 1;
+a
+2
+SELECT a FROM t1 GROUP BY a
+HAVING a IN ( (SELECT b FROM t2 where b=1) IN (SELECT c FROM t3)  );
+a
+1
+EXPLAIN FORMAT=JSON SELECT a FROM t1 GROUP BY a
+HAVING a = ( (SELECT b FROM t2 where b=1) IN (SELECT c FROM t3)  ) + 1;
+EXPLAIN
+{
+  "query_block": {
+    "select_id": 1,
+    "table": {
+      "table_name": "t1",
+      "access_type": "ALL",
+      "rows": 3,
+      "filtered": 100,
+      "attached_condition": "t1.a = <cache>(<in_optimizer>((subquery#2),<exists>(subquery#3)) + 1)"
+    },
+    "subqueries": [
+      {
+        "query_block": {
+          "select_id": 3,
+          "having_condition": "trigcond(t3.c is null)",
+          "table": {
+            "table_name": "t3",
+            "access_type": "ALL",
+            "rows": 2,
+            "filtered": 100,
+            "attached_condition": "trigcond(1 = t3.c or t3.c is null)"
+          }
+        }
+      },
+      {
+        "query_block": {
+          "select_id": 2,
+          "table": {
+            "table_name": "t2",
+            "access_type": "ALL",
+            "rows": 2,
+            "filtered": 100,
+            "attached_condition": "t2.b = 1"
+          }
+        }
+      }
+    ]
+  }
+}
+PREPARE stmt FROM "SELECT a FROM t1 GROUP BY a
+HAVING a = ( (SELECT b FROM t2 where b=1) IN (SELECT c FROM t3)  ) + 1";
+EXECUTE stmt;
+a
+2
+EXECUTE stmt;
+a
+2
+DEALLOCATE PREPARE stmt;
+DROP TABLE t1,t2,t3;
 # End of 10.4 tests
diff --git a/mysql-test/main/subselect4.test b/mysql-test/main/subselect4.test
index 23611e4ec0d..d5871f1202c 100644
--- a/mysql-test/main/subselect4.test
+++ b/mysql-test/main/subselect4.test
@@ -2629,5 +2629,41 @@ SELECT
          )
   );
 
+--echo #
+--echo # MDEV-29362: Constant subquery used as left part of IN subquery
+--echo #
+
+CREATE TABLE t1 (a int) ENGINE=MyISAM;
+INSERT INTO t1 VALUES (15), (1), (2);
+CREATE TABLE t2 (b int) ENGINE=MyISAM;
+INSERT INTO t2 VALUES (15), (1);
+CREATE TABLE t3 (c int) ENGINE=MyISAM;
+INSERT INTO t3 VALUES (15), (1);
+
+let $q1=
+SELECT a FROM t1 GROUP BY a
+  HAVING a = ( (SELECT b FROM t2 where b=1) IN (SELECT c FROM t3)  ) + 1;
+let $q2=
+SELECT a FROM t1 GROUP BY a
+  HAVING a IN ( (SELECT b FROM t2 where b=1) IN (SELECT c FROM t3)  );
+
+SET optimizer_switch='condition_pushdown_from_having=off';
+
+eval $q1;
+eval $q2;
+
+SET optimizer_switch='condition_pushdown_from_having=on';
+
+eval $q1;
+eval $q2;
+
+eval EXPLAIN FORMAT=JSON $q1;
+
+eval PREPARE stmt FROM "$q1";
+EXECUTE stmt;
+EXECUTE stmt;
+DEALLOCATE PREPARE stmt;
+
+DROP TABLE t1,t2,t3;
 
 --echo # End of 10.4 tests
diff --git a/sql/item_cmpfunc.cc b/sql/item_cmpfunc.cc
index 2a1fc3f90d3..cffd2e8add8 100644
--- a/sql/item_cmpfunc.cc
+++ b/sql/item_cmpfunc.cc
@@ -1444,6 +1444,23 @@ bool Item_in_optimizer::invisible_mode()
 }
 
 
+bool Item_in_optimizer::walk(Item_processor processor,
+                             bool walk_subquery,
+                             void *arg)
+{
+  bool res= FALSE;
+  if (args[1]->type() == Item::SUBSELECT_ITEM &&
+      ((Item_subselect *)args[1])->substype() != Item_subselect::EXISTS_SUBS &&
+      !(((Item_subselect *)args[1])->substype() == Item_subselect::IN_SUBS &&
+        ((Item_in_subselect *)args[1])->test_strategy(SUBS_IN_TO_EXISTS)))
+    res= args[0]->walk(processor, walk_subquery, arg);
+  if (!res)
+    res= args[1]->walk(processor, walk_subquery, arg);
+
+  return res || (this->*processor)(arg);
+}
+
+
 /**
   Add an expression cache for this subquery if it is needed
 
diff --git a/sql/item_cmpfunc.h b/sql/item_cmpfunc.h
index 9731eb7755d..1ae0e652e88 100644
--- a/sql/item_cmpfunc.h
+++ b/sql/item_cmpfunc.h
@@ -385,6 +385,7 @@ public:
   bool eval_not_null_tables(void *opt_arg);
   void fix_after_pullout(st_select_lex *new_parent, Item **ref, bool merge);
   bool invisible_mode();
+  bool walk(Item_processor processor, bool walk_subquery, void *arg);
   void reset_cache() { cache= NULL; }
   virtual void print(String *str, enum_query_type query_type);
   void restore_first_argument();