diff --git a/mysql-test/main/win.result b/mysql-test/main/win.result
index 96b13010516..668f7b793cb 100644
--- a/mysql-test/main/win.result
+++ b/mysql-test/main/win.result
@@ -4391,3 +4391,177 @@ row_number() OVER (order by a)
 2
 3
 drop table t1;
+#
+# MDEV-29307: join of 2 derived tables over the same grouping view such
+#             that the first of the joined tables contains a window
+#             function and the view's specification contains a subquery
+#             with a set function aggregated on the top level
+#
+CREATE TABLE t1 (
+tst int NOT NULL,
+flat tinyint unsigned NOT NULL,
+type tinyint unsigned NOT NULL,
+val int NOT NULL,
+PRIMARY KEY (tst,flat,type)
+) ENGINE=ARIA;
+INSERT INTO t1 VALUES
+(5, 20, 2,  100),
+(7, 20, 2,  150),
+(9, 20, 1, 200);
+CREATE VIEW v1 AS (
+SELECT
+flat,
+type,
+( SELECT val FROM t1 sw
+WHERE sw.tst = MAX(w.tst) AND sw.flat = w.flat AND sw.type = w.type)
+AS total
+FROM t1 w
+GROUP BY flat, type
+);
+EXPLAIN EXTENDED SELECT w2.total AS w2_total, w1.total AS w1_total
+FROM
+(
+SELECT flat, type, total
+FROM v1
+WHERE type = 1
+) AS w1
+JOIN
+(
+SELECT flat, type, total
+FROM v1
+WHERE type = 2
+) AS w2
+ON w1.flat = w2.flat;
+id	select_type	table	type	possible_keys	key	key_len	ref	rows	filtered	Extra
+1	PRIMARY	<derived4>	ALL	NULL	NULL	NULL	NULL	3	100.00	Using where
+1	PRIMARY	<derived6>	ref	key0	key0	1	v1.flat	2	100.00	Using where
+6	DERIVED	w	index	NULL	PRIMARY	6	NULL	3	100.00	Using where; Using index; Using temporary; Using filesort
+7	DEPENDENT SUBQUERY	sw	eq_ref	PRIMARY	PRIMARY	6	func,func,func	1	100.00	Using index condition
+4	DERIVED	w	index	NULL	PRIMARY	6	NULL	3	100.00	Using where; Using index; Using temporary; Using filesort
+5	DEPENDENT SUBQUERY	sw	eq_ref	PRIMARY	PRIMARY	6	func,func,func	1	100.00	Using index condition
+Warnings:
+Note	1276	Field or reference 'test.w.tst' of SELECT #5 was resolved in SELECT #4
+Note	1981	Aggregate function 'max()' of SELECT #5 belongs to SELECT #4
+Note	1276	Field or reference 'test.w.flat' of SELECT #5 was resolved in SELECT #4
+Note	1276	Field or reference 'test.w.type' of SELECT #5 was resolved in SELECT #4
+Note	1276	Field or reference 'test.w.tst' of SELECT #7 was resolved in SELECT #6
+Note	1981	Aggregate function 'max()' of SELECT #7 belongs to SELECT #6
+Note	1276	Field or reference 'test.w.flat' of SELECT #7 was resolved in SELECT #6
+Note	1276	Field or reference 'test.w.type' of SELECT #7 was resolved in SELECT #6
+Note	1003	/* select#1 */ select `v1`.`total` AS `w2_total`,`v1`.`total` AS `w1_total` from `test`.`v1` join `test`.`v1` where `v1`.`flat` = `v1`.`flat` and `v1`.`type` = 2 and `v1`.`type` = 1
+SELECT w2.total AS w2_total, w1.total AS w1_total
+FROM
+(
+SELECT flat, type, total
+FROM v1
+WHERE type = 1
+) AS w1
+JOIN
+(
+SELECT flat, type, total
+FROM v1
+WHERE type = 2
+) AS w2
+ON w1.flat = w2.flat;
+w2_total	w1_total
+150	200
+EXPLAIN EXTENDED SELECT w2.total AS w2_total, w1.total AS w1_total
+FROM
+(
+SELECT flat, type, total,
+COUNT(total) OVER (PARTITION BY type ORDER BY type) AS u
+FROM v1
+WHERE type = 1
+) AS w1
+JOIN
+(
+SELECT flat, type, total
+FROM v1
+WHERE type = 2
+) AS w2
+ON w1.flat = w2.flat;
+id	select_type	table	type	possible_keys	key	key_len	ref	rows	filtered	Extra
+1	PRIMARY	<derived2>	ALL	NULL	NULL	NULL	NULL	3	100.00	Using where
+1	PRIMARY	<derived6>	ref	key0	key0	1	w1.flat	2	100.00	Using where
+6	DERIVED	w	index	NULL	PRIMARY	6	NULL	3	100.00	Using where; Using index; Using temporary; Using filesort
+7	DEPENDENT SUBQUERY	sw	eq_ref	PRIMARY	PRIMARY	6	func,func,func	1	100.00	Using index condition
+2	DERIVED	<derived4>	ALL	NULL	NULL	NULL	NULL	3	100.00	Using where; Using temporary
+4	DERIVED	w	index	NULL	PRIMARY	6	NULL	3	100.00	Using where; Using index; Using temporary; Using filesort
+5	DEPENDENT SUBQUERY	sw	eq_ref	PRIMARY	PRIMARY	6	func,func,func	1	100.00	Using index condition
+Warnings:
+Note	1276	Field or reference 'test.w.tst' of SELECT #5 was resolved in SELECT #4
+Note	1981	Aggregate function 'max()' of SELECT #5 belongs to SELECT #4
+Note	1276	Field or reference 'test.w.flat' of SELECT #5 was resolved in SELECT #4
+Note	1276	Field or reference 'test.w.type' of SELECT #5 was resolved in SELECT #4
+Note	1276	Field or reference 'test.w.tst' of SELECT #7 was resolved in SELECT #6
+Note	1981	Aggregate function 'max()' of SELECT #7 belongs to SELECT #6
+Note	1276	Field or reference 'test.w.flat' of SELECT #7 was resolved in SELECT #6
+Note	1276	Field or reference 'test.w.type' of SELECT #7 was resolved in SELECT #6
+Note	1003	/* select#1 */ select `v1`.`total` AS `w2_total`,`w1`.`total` AS `w1_total` from (/* select#2 */ select `v1`.`flat` AS `flat`,`v1`.`type` AS `type`,`v1`.`total` AS `total`,count(`v1`.`total`) over ( partition by `v1`.`type` order by `v1`.`type`) AS `u` from `test`.`v1` where `v1`.`type` = 1) `w1` join `test`.`v1` where `v1`.`flat` = `w1`.`flat` and `v1`.`type` = 2
+SELECT w2.total AS w2_total, w1.total AS w1_total
+FROM
+(
+SELECT flat, type, total,
+COUNT(total) OVER (PARTITION BY type ORDER BY type) AS u
+FROM v1
+WHERE type = 1
+) AS w1
+JOIN
+(
+SELECT flat, type, total
+FROM v1
+WHERE type = 2
+) AS w2
+ON w1.flat = w2.flat;
+w2_total	w1_total
+150	200
+EXPLAIN EXTENDED SELECT w2.total AS w2_total, w1.total AS w1_total, u
+FROM
+(
+SELECT flat, type, total,
+COUNT(total) OVER (PARTITION BY flat ORDER BY flat) AS u
+FROM v1
+) AS w1
+JOIN
+(
+SELECT flat, type, total
+FROM v1
+) AS w2;
+id	select_type	table	type	possible_keys	key	key_len	ref	rows	filtered	Extra
+1	PRIMARY	<derived2>	ALL	NULL	NULL	NULL	NULL	3	100.00	
+1	PRIMARY	<derived6>	ALL	NULL	NULL	NULL	NULL	3	100.00	Using join buffer (flat, BNL join)
+6	DERIVED	w	index	NULL	PRIMARY	6	NULL	3	100.00	Using index; Using temporary; Using filesort
+7	DEPENDENT SUBQUERY	sw	eq_ref	PRIMARY	PRIMARY	6	func,func,func	1	100.00	Using index condition
+2	DERIVED	<derived4>	ALL	NULL	NULL	NULL	NULL	3	100.00	Using temporary
+4	DERIVED	w	index	NULL	PRIMARY	6	NULL	3	100.00	Using index; Using temporary; Using filesort
+5	DEPENDENT SUBQUERY	sw	eq_ref	PRIMARY	PRIMARY	6	func,func,func	1	100.00	Using index condition
+Warnings:
+Note	1276	Field or reference 'test.w.tst' of SELECT #5 was resolved in SELECT #4
+Note	1981	Aggregate function 'max()' of SELECT #5 belongs to SELECT #4
+Note	1276	Field or reference 'test.w.flat' of SELECT #5 was resolved in SELECT #4
+Note	1276	Field or reference 'test.w.type' of SELECT #5 was resolved in SELECT #4
+Note	1276	Field or reference 'test.w.tst' of SELECT #7 was resolved in SELECT #6
+Note	1981	Aggregate function 'max()' of SELECT #7 belongs to SELECT #6
+Note	1276	Field or reference 'test.w.flat' of SELECT #7 was resolved in SELECT #6
+Note	1276	Field or reference 'test.w.type' of SELECT #7 was resolved in SELECT #6
+Note	1003	/* select#1 */ select `v1`.`total` AS `w2_total`,`w1`.`total` AS `w1_total`,`w1`.`u` AS `u` from (/* select#2 */ select `v1`.`flat` AS `flat`,`v1`.`type` AS `type`,`v1`.`total` AS `total`,count(`v1`.`total`) over ( partition by `v1`.`flat` order by `v1`.`flat`) AS `u` from `test`.`v1`) `w1` join `test`.`v1`
+SELECT w2.total AS w2_total, w1.total AS w1_total, u
+FROM
+(
+SELECT flat, type, total,
+COUNT(total) OVER (PARTITION BY flat ORDER BY flat) AS u
+FROM v1
+) AS w1
+JOIN
+(
+SELECT flat, type, total
+FROM v1
+) AS w2;
+w2_total	w1_total	u
+150	150	2
+150	200	2
+200	150	2
+200	200	2
+DROP VIEW v1;
+DROP TABLE t1;
+# End of 10.5 tests
diff --git a/mysql-test/main/win.test b/mysql-test/main/win.test
index cba6b0fd7af..363bf8f8ad9 100644
--- a/mysql-test/main/win.test
+++ b/mysql-test/main/win.test
@@ -2873,3 +2873,96 @@ create table t1 (a int);
 insert into t1 values (1),(2),(3);
 SELECT  row_number() OVER (order by a) FROM t1  order by NAME_CONST('myname',NULL);
 drop table t1;
+
+--echo #
+--echo # MDEV-29307: join of 2 derived tables over the same grouping view such
+--echo #             that the first of the joined tables contains a window
+--echo #             function and the view's specification contains a subquery
+--echo #             with a set function aggregated on the top level
+--echo #
+
+CREATE TABLE t1 (
+  tst int NOT NULL,
+  flat tinyint unsigned NOT NULL,
+  type tinyint unsigned NOT NULL,
+  val int NOT NULL,
+  PRIMARY KEY (tst,flat,type)
+) ENGINE=ARIA;
+
+INSERT INTO t1 VALUES
+(5, 20, 2,  100),
+(7, 20, 2,  150),
+(9, 20, 1, 200);
+
+CREATE VIEW v1 AS (
+  SELECT
+    flat,
+    type,
+    ( SELECT val FROM t1 sw
+        WHERE sw.tst = MAX(w.tst) AND sw.flat = w.flat AND sw.type = w.type)
+    AS total
+  FROM t1 w
+  GROUP BY flat, type
+);
+
+let $q1=
+SELECT w2.total AS w2_total, w1.total AS w1_total
+FROM
+(
+  SELECT flat, type, total
+  FROM v1
+  WHERE type = 1
+) AS w1
+JOIN
+(
+  SELECT flat, type, total
+  FROM v1
+  WHERE type = 2
+) AS w2
+ON w1.flat = w2.flat;
+
+eval EXPLAIN EXTENDED $q1;
+eval $q1;
+
+let $q2=
+SELECT w2.total AS w2_total, w1.total AS w1_total
+FROM
+(
+  SELECT flat, type, total,
+  COUNT(total) OVER (PARTITION BY type ORDER BY type) AS u
+  FROM v1
+  WHERE type = 1
+) AS w1
+JOIN
+(
+  SELECT flat, type, total
+  FROM v1
+  WHERE type = 2
+) AS w2
+ON w1.flat = w2.flat;
+
+eval EXPLAIN EXTENDED $q2;
+eval $q2;
+
+let $q3=
+SELECT w2.total AS w2_total, w1.total AS w1_total, u
+FROM
+(
+  SELECT flat, type, total,
+  COUNT(total) OVER (PARTITION BY flat ORDER BY flat) AS u
+  FROM v1
+) AS w1
+JOIN
+(
+  SELECT flat, type, total
+  FROM v1
+) AS w2;
+
+eval EXPLAIN EXTENDED $q3;
+--sorted_result
+eval $q3;
+
+DROP VIEW v1;
+DROP TABLE t1;
+
+--echo # End of 10.5 tests
diff --git a/mysql-test/suite/encryption/r/tempfiles_encrypted.result b/mysql-test/suite/encryption/r/tempfiles_encrypted.result
index 5b9dab62c01..b913b295ad3 100644
--- a/mysql-test/suite/encryption/r/tempfiles_encrypted.result
+++ b/mysql-test/suite/encryption/r/tempfiles_encrypted.result
@@ -4398,6 +4398,180 @@ row_number() OVER (order by a)
 3
 drop table t1;
 #
+# MDEV-29307: join of 2 derived tables over the same grouping view such
+#             that the first of the joined tables contains a window
+#             function and the view's specification contains a subquery
+#             with a set function aggregated on the top level
+#
+CREATE TABLE t1 (
+tst int NOT NULL,
+flat tinyint unsigned NOT NULL,
+type tinyint unsigned NOT NULL,
+val int NOT NULL,
+PRIMARY KEY (tst,flat,type)
+) ENGINE=ARIA;
+INSERT INTO t1 VALUES
+(5, 20, 2,  100),
+(7, 20, 2,  150),
+(9, 20, 1, 200);
+CREATE VIEW v1 AS (
+SELECT
+flat,
+type,
+( SELECT val FROM t1 sw
+WHERE sw.tst = MAX(w.tst) AND sw.flat = w.flat AND sw.type = w.type)
+AS total
+FROM t1 w
+GROUP BY flat, type
+);
+EXPLAIN EXTENDED SELECT w2.total AS w2_total, w1.total AS w1_total
+FROM
+(
+SELECT flat, type, total
+FROM v1
+WHERE type = 1
+) AS w1
+JOIN
+(
+SELECT flat, type, total
+FROM v1
+WHERE type = 2
+) AS w2
+ON w1.flat = w2.flat;
+id	select_type	table	type	possible_keys	key	key_len	ref	rows	filtered	Extra
+1	PRIMARY	<derived4>	ALL	NULL	NULL	NULL	NULL	3	100.00	Using where
+1	PRIMARY	<derived6>	ref	key0	key0	1	v1.flat	2	100.00	Using where
+6	DERIVED	w	index	NULL	PRIMARY	6	NULL	3	100.00	Using where; Using index; Using temporary; Using filesort
+7	DEPENDENT SUBQUERY	sw	eq_ref	PRIMARY	PRIMARY	6	func,func,func	1	100.00	Using index condition
+4	DERIVED	w	index	NULL	PRIMARY	6	NULL	3	100.00	Using where; Using index; Using temporary; Using filesort
+5	DEPENDENT SUBQUERY	sw	eq_ref	PRIMARY	PRIMARY	6	func,func,func	1	100.00	Using index condition
+Warnings:
+Note	1276	Field or reference 'test.w.tst' of SELECT #5 was resolved in SELECT #4
+Note	1981	Aggregate function 'max()' of SELECT #5 belongs to SELECT #4
+Note	1276	Field or reference 'test.w.flat' of SELECT #5 was resolved in SELECT #4
+Note	1276	Field or reference 'test.w.type' of SELECT #5 was resolved in SELECT #4
+Note	1276	Field or reference 'test.w.tst' of SELECT #7 was resolved in SELECT #6
+Note	1981	Aggregate function 'max()' of SELECT #7 belongs to SELECT #6
+Note	1276	Field or reference 'test.w.flat' of SELECT #7 was resolved in SELECT #6
+Note	1276	Field or reference 'test.w.type' of SELECT #7 was resolved in SELECT #6
+Note	1003	/* select#1 */ select `v1`.`total` AS `w2_total`,`v1`.`total` AS `w1_total` from `test`.`v1` join `test`.`v1` where `v1`.`flat` = `v1`.`flat` and `v1`.`type` = 2 and `v1`.`type` = 1
+SELECT w2.total AS w2_total, w1.total AS w1_total
+FROM
+(
+SELECT flat, type, total
+FROM v1
+WHERE type = 1
+) AS w1
+JOIN
+(
+SELECT flat, type, total
+FROM v1
+WHERE type = 2
+) AS w2
+ON w1.flat = w2.flat;
+w2_total	w1_total
+150	200
+EXPLAIN EXTENDED SELECT w2.total AS w2_total, w1.total AS w1_total
+FROM
+(
+SELECT flat, type, total,
+COUNT(total) OVER (PARTITION BY type ORDER BY type) AS u
+FROM v1
+WHERE type = 1
+) AS w1
+JOIN
+(
+SELECT flat, type, total
+FROM v1
+WHERE type = 2
+) AS w2
+ON w1.flat = w2.flat;
+id	select_type	table	type	possible_keys	key	key_len	ref	rows	filtered	Extra
+1	PRIMARY	<derived2>	ALL	NULL	NULL	NULL	NULL	3	100.00	Using where
+1	PRIMARY	<derived6>	ref	key0	key0	1	w1.flat	2	100.00	Using where
+6	DERIVED	w	index	NULL	PRIMARY	6	NULL	3	100.00	Using where; Using index; Using temporary; Using filesort
+7	DEPENDENT SUBQUERY	sw	eq_ref	PRIMARY	PRIMARY	6	func,func,func	1	100.00	Using index condition
+2	DERIVED	<derived4>	ALL	NULL	NULL	NULL	NULL	3	100.00	Using where; Using temporary
+4	DERIVED	w	index	NULL	PRIMARY	6	NULL	3	100.00	Using where; Using index; Using temporary; Using filesort
+5	DEPENDENT SUBQUERY	sw	eq_ref	PRIMARY	PRIMARY	6	func,func,func	1	100.00	Using index condition
+Warnings:
+Note	1276	Field or reference 'test.w.tst' of SELECT #5 was resolved in SELECT #4
+Note	1981	Aggregate function 'max()' of SELECT #5 belongs to SELECT #4
+Note	1276	Field or reference 'test.w.flat' of SELECT #5 was resolved in SELECT #4
+Note	1276	Field or reference 'test.w.type' of SELECT #5 was resolved in SELECT #4
+Note	1276	Field or reference 'test.w.tst' of SELECT #7 was resolved in SELECT #6
+Note	1981	Aggregate function 'max()' of SELECT #7 belongs to SELECT #6
+Note	1276	Field or reference 'test.w.flat' of SELECT #7 was resolved in SELECT #6
+Note	1276	Field or reference 'test.w.type' of SELECT #7 was resolved in SELECT #6
+Note	1003	/* select#1 */ select `v1`.`total` AS `w2_total`,`w1`.`total` AS `w1_total` from (/* select#2 */ select `v1`.`flat` AS `flat`,`v1`.`type` AS `type`,`v1`.`total` AS `total`,count(`v1`.`total`) over ( partition by `v1`.`type` order by `v1`.`type`) AS `u` from `test`.`v1` where `v1`.`type` = 1) `w1` join `test`.`v1` where `v1`.`flat` = `w1`.`flat` and `v1`.`type` = 2
+SELECT w2.total AS w2_total, w1.total AS w1_total
+FROM
+(
+SELECT flat, type, total,
+COUNT(total) OVER (PARTITION BY type ORDER BY type) AS u
+FROM v1
+WHERE type = 1
+) AS w1
+JOIN
+(
+SELECT flat, type, total
+FROM v1
+WHERE type = 2
+) AS w2
+ON w1.flat = w2.flat;
+w2_total	w1_total
+150	200
+EXPLAIN EXTENDED SELECT w2.total AS w2_total, w1.total AS w1_total, u
+FROM
+(
+SELECT flat, type, total,
+COUNT(total) OVER (PARTITION BY flat ORDER BY flat) AS u
+FROM v1
+) AS w1
+JOIN
+(
+SELECT flat, type, total
+FROM v1
+) AS w2;
+id	select_type	table	type	possible_keys	key	key_len	ref	rows	filtered	Extra
+1	PRIMARY	<derived2>	ALL	NULL	NULL	NULL	NULL	3	100.00	
+1	PRIMARY	<derived6>	ALL	NULL	NULL	NULL	NULL	3	100.00	Using join buffer (flat, BNL join)
+6	DERIVED	w	index	NULL	PRIMARY	6	NULL	3	100.00	Using index; Using temporary; Using filesort
+7	DEPENDENT SUBQUERY	sw	eq_ref	PRIMARY	PRIMARY	6	func,func,func	1	100.00	Using index condition
+2	DERIVED	<derived4>	ALL	NULL	NULL	NULL	NULL	3	100.00	Using temporary
+4	DERIVED	w	index	NULL	PRIMARY	6	NULL	3	100.00	Using index; Using temporary; Using filesort
+5	DEPENDENT SUBQUERY	sw	eq_ref	PRIMARY	PRIMARY	6	func,func,func	1	100.00	Using index condition
+Warnings:
+Note	1276	Field or reference 'test.w.tst' of SELECT #5 was resolved in SELECT #4
+Note	1981	Aggregate function 'max()' of SELECT #5 belongs to SELECT #4
+Note	1276	Field or reference 'test.w.flat' of SELECT #5 was resolved in SELECT #4
+Note	1276	Field or reference 'test.w.type' of SELECT #5 was resolved in SELECT #4
+Note	1276	Field or reference 'test.w.tst' of SELECT #7 was resolved in SELECT #6
+Note	1981	Aggregate function 'max()' of SELECT #7 belongs to SELECT #6
+Note	1276	Field or reference 'test.w.flat' of SELECT #7 was resolved in SELECT #6
+Note	1276	Field or reference 'test.w.type' of SELECT #7 was resolved in SELECT #6
+Note	1003	/* select#1 */ select `v1`.`total` AS `w2_total`,`w1`.`total` AS `w1_total`,`w1`.`u` AS `u` from (/* select#2 */ select `v1`.`flat` AS `flat`,`v1`.`type` AS `type`,`v1`.`total` AS `total`,count(`v1`.`total`) over ( partition by `v1`.`flat` order by `v1`.`flat`) AS `u` from `test`.`v1`) `w1` join `test`.`v1`
+SELECT w2.total AS w2_total, w1.total AS w1_total, u
+FROM
+(
+SELECT flat, type, total,
+COUNT(total) OVER (PARTITION BY flat ORDER BY flat) AS u
+FROM v1
+) AS w1
+JOIN
+(
+SELECT flat, type, total
+FROM v1
+) AS w2;
+w2_total	w1_total	u
+150	150	2
+150	200	2
+200	150	2
+200	200	2
+DROP VIEW v1;
+DROP TABLE t1;
+# End of 10.5 tests
+#
 # MDEV-23867: select crash in compute_window_func
 #
 set @save_sort_buffer_size=@@sort_buffer_size;
diff --git a/sql/item_sum.cc b/sql/item_sum.cc
index 4cf403c1618..a7fae9ea4c0 100644
--- a/sql/item_sum.cc
+++ b/sql/item_sum.cc
@@ -177,7 +177,11 @@ bool Item_sum::check_sum_func(THD *thd, Item **ref)
   }
 
   if (window_func_sum_expr_flag)
+  {
+    thd->lex->in_sum_func= in_sum_func;
     return false;
+  }
+
   /*  
     The value of max_arg_level is updated if an argument of the set function
     contains a column reference resolved  against a subquery whose level is