diff --git a/mysql-test/r/group_by.result b/mysql-test/r/group_by.result
index c996627486c4f..55e7703a3771a 100644
--- a/mysql-test/r/group_by.result
+++ b/mysql-test/r/group_by.result
@@ -2875,3 +2875,47 @@ WHERE c.table_schema=(SELECT COUNT(*) FROM INFORMATION_SCHEMA.columns GROUP BY c
 GROUP BY t.table_name;
 ERROR HY001: Out of sort memory, consider increasing server sort buffer size
 SET max_sort_length= @save_max_sort_length;
+#
+# MDEV-23826: ORDER BY in view definition leads to wrong result with GROUP BY on query using view
+#
+CREATE TABLE t1
+(
+id INT PRIMARY KEY AUTO_INCREMENT,
+dt datetime,
+INDEX(dt),
+foo int
+);
+INSERT INTO t1 VALUES (1,'2020-09-26 12:00:00',1);
+INSERT INTO t1 VALUES (2,'2020-09-26 13:00:00',1);
+INSERT INTO t1 VALUES (3,'2020-09-27 13:00:00',1);
+INSERT INTO t1 VALUES (4,'2020-09-27 12:00:00',1);
+INSERT INTO t1 VALUES (5,'2020-09-28 12:00:00',1);
+INSERT INTO t1 VALUES (6,'2020-09-28 13:00:00',1);
+INSERT INTO t1 VALUES (7,'2020-09-25 12:00:00',1);
+INSERT INTO t1 VALUES (8,'2020-09-25 13:00:00',1);
+INSERT INTO t1 VALUES (9,'2020-09-26 13:00:00',1);
+CREATE VIEW v1 AS SELECT * FROM t1;
+CREATE VIEW v2 AS SELECT * FROM t1 ORDER BY dt;
+SELECT dt, sum(foo) AS foo FROM v1 WHERE dt>DATE_SUB('2020-09-27 00:00:00', INTERVAL 3 DAY) GROUP BY dt;
+dt	foo
+2020-09-25 12:00:00	1
+2020-09-25 13:00:00	1
+2020-09-26 12:00:00	1
+2020-09-26 13:00:00	2
+2020-09-27 12:00:00	1
+2020-09-27 13:00:00	1
+2020-09-28 12:00:00	1
+2020-09-28 13:00:00	1
+SELECT dt, sum(foo) AS foo FROM v2 WHERE dt>DATE_SUB('2020-09-27 00:00:00', INTERVAL 3 DAY) GROUP BY dt;
+dt	foo
+2020-09-25 12:00:00	1
+2020-09-25 13:00:00	1
+2020-09-26 12:00:00	1
+2020-09-26 13:00:00	2
+2020-09-27 12:00:00	1
+2020-09-27 13:00:00	1
+2020-09-28 12:00:00	1
+2020-09-28 13:00:00	1
+DROP TABLE t1;
+DROP VIEW v1,v2;
+# End of 10.2 tests
diff --git a/mysql-test/t/group_by.test b/mysql-test/t/group_by.test
index 324b41ce23cce..d4c6d6527d57c 100644
--- a/mysql-test/t/group_by.test
+++ b/mysql-test/t/group_by.test
@@ -1996,3 +1996,36 @@ ON t.table_schema=c.table_schema
 WHERE c.table_schema=(SELECT COUNT(*) FROM INFORMATION_SCHEMA.columns GROUP BY column_type)
 GROUP BY t.table_name;
 SET max_sort_length= @save_max_sort_length;
+
+
+--echo #
+--echo # MDEV-23826: ORDER BY in view definition leads to wrong result with GROUP BY on query using view
+--echo #
+
+CREATE TABLE t1
+(
+  id INT PRIMARY KEY AUTO_INCREMENT,
+  dt datetime,
+  INDEX(dt),
+  foo int
+);
+
+INSERT INTO t1 VALUES (1,'2020-09-26 12:00:00',1);
+INSERT INTO t1 VALUES (2,'2020-09-26 13:00:00',1);
+INSERT INTO t1 VALUES (3,'2020-09-27 13:00:00',1);
+INSERT INTO t1 VALUES (4,'2020-09-27 12:00:00',1);
+INSERT INTO t1 VALUES (5,'2020-09-28 12:00:00',1);
+INSERT INTO t1 VALUES (6,'2020-09-28 13:00:00',1);
+INSERT INTO t1 VALUES (7,'2020-09-25 12:00:00',1);
+INSERT INTO t1 VALUES (8,'2020-09-25 13:00:00',1);
+INSERT INTO t1 VALUES (9,'2020-09-26 13:00:00',1);
+
+CREATE VIEW v1 AS SELECT * FROM t1;
+CREATE VIEW v2 AS SELECT * FROM t1 ORDER BY dt;
+SELECT dt, sum(foo) AS foo FROM v1 WHERE dt>DATE_SUB('2020-09-27 00:00:00', INTERVAL 3 DAY) GROUP BY dt;
+SELECT dt, sum(foo) AS foo FROM v2 WHERE dt>DATE_SUB('2020-09-27 00:00:00', INTERVAL 3 DAY) GROUP BY dt;
+
+DROP TABLE t1;
+DROP VIEW v1,v2;
+
+--echo # End of 10.2 tests
diff --git a/sql/item.cc b/sql/item.cc
index a2753caf49677..e633964270bd6 100644
--- a/sql/item.cc
+++ b/sql/item.cc
@@ -8160,6 +8160,22 @@ bool Item_direct_ref::get_date(MYSQL_TIME *ltime,ulonglong fuzzydate)
 }
 
 
+longlong Item_direct_ref::val_time_packed()
+{
+  longlong tmp = (*ref)->val_time_packed();
+  null_value= (*ref)->null_value;
+  return tmp;
+}
+
+
+longlong Item_direct_ref::val_datetime_packed()
+{
+  longlong tmp = (*ref)->val_datetime_packed();
+  null_value= (*ref)->null_value;
+  return tmp;
+}
+
+
 Item_cache_wrapper::~Item_cache_wrapper()
 {
   DBUG_ASSERT(expr_cache == 0);
diff --git a/sql/item.h b/sql/item.h
index ed20074a8dacb..823ffd873b62a 100644
--- a/sql/item.h
+++ b/sql/item.h
@@ -4671,13 +4671,16 @@ class Item_direct_ref :public Item_ref
     return Item_ref::fix_fields(thd, it);
   }
   void save_val(Field *to);
+  /* Below we should have all val() methods as in Item_ref */
   double val_real();
   longlong val_int();
-  String *val_str(String* tmp);
   my_decimal *val_decimal(my_decimal *);
   bool val_bool();
+  String *val_str(String* tmp);
   bool is_null();
   bool get_date(MYSQL_TIME *ltime, ulonglong fuzzydate);
+  longlong val_datetime_packed();
+  longlong val_time_packed();
   virtual Ref_Type ref_type() { return DIRECT_REF; }
   Item *get_copy(THD *thd, MEM_ROOT *mem_root)
   { return get_item_copy<Item_direct_ref>(thd, mem_root, this); }
@@ -4992,6 +4995,20 @@ class Item_direct_view_ref :public Item_direct_ref
     }
     return Item_direct_ref::get_date(ltime, fuzzydate);
   }
+  longlong val_time_packed()
+  {
+    if (check_null_ref())
+      return 0;
+    else
+      return Item_direct_ref::val_time_packed();
+  }
+  longlong val_datetime_packed()
+  {
+    if (check_null_ref())
+      return 0;
+    else
+      return Item_direct_ref::val_datetime_packed();
+  }
   bool send(Protocol *protocol, String *buffer);
   void save_org_in_field(Field *field,
                          fast_field_copier data __attribute__ ((__unused__)))