MDEV-36389 Incorrect query results for an indexed text column

Fixes a scenario where an IN subquery returned the wrong result because the pushed WHERE clause was not retained for downstream result filtering. For example: CREATE TABLE t1 (c1 TEXT, UNIQUE (c1(1))); INSERT INTO t1 (c1) VALUES ('a'); SELECT 'abc' IN (SELECT c1 FROM t1); Internally, he 'abc' IN subquery condition becomes the constant condition: 'abc' = t1.c1 or t1.c1 is null Prior to this patch, this condition was incorrectly removed when converting the subquery engine to an index lookup-based engine. Now eligible conditions are preserved during such engine rewrites.
2025-08-08 11:22:35 +03:00 · 2025-07-23 15:40:53 +03:00
parent 3109d994eb
commit a52362b90c
21 changed files with 201 additions and 119 deletions
--- a/mysql-test/main/join.result
+++ b/mysql-test/main/join.result
@@ -1414,7 +1414,7 @@ WHERE t1.f1 IN (SELECT f1 FROM t1) AND t1.f1 = t2.f1 OR t1.f1 = 9;
 id	select_type	table	type	possible_keys	key	key_len	ref	rows	Extra
 1	PRIMARY	t1	ALL	PRIMARY	NULL	NULL	NULL	2	Using where
 1	PRIMARY	t2	ALL	PRIMARY	NULL	NULL	NULL	2	Using where; Using join buffer (flat, BNL join)
-2	DEPENDENT SUBQUERY	t1	unique_subquery	PRIMARY	PRIMARY	4	func	1	Using index
+2	SUBQUERY	t1	unique_subquery	PRIMARY	PRIMARY	4	func	1	Using index
 SELECT STRAIGHT_JOIN * FROM t1 JOIN t2 ON t2.f2 = t1.f1
 WHERE t1.f1 IN (SELECT f1 FROM t1) AND t1.f1 = t2.f1 OR t1.f1 = 9;
 f1	f2	f1	f2
--- a/mysql-test/main/subselect.result
+++ b/mysql-test/main/subselect.result
@@ -993,9 +993,9 @@ a	t1.a in (select t2.a from t2)
 explain extended SELECT t1.a, t1.a in (select t2.a from t2) FROM t1;
 id	select_type	table	type	possible_keys	key	key_len	ref	rows	filtered	Extra
 1	PRIMARY	t1	index	NULL	PRIMARY	4	NULL	4	100.00	Using index
-2	SUBQUERY	t2	index_subquery	a	a	5	func	2	100.00	Using index
+2	DEPENDENT SUBQUERY	t2	index_subquery	a	a	5	func	2	100.00	Using index; Using where
 Warnings:
-Note	1003	/* select#1 */ select `test`.`t1`.`a` AS `a`,<expr_cache><`test`.`t1`.`a`>(<in_optimizer>(`test`.`t1`.`a`,<exists>(<index_lookup>(<cache>(`test`.`t1`.`a`) in t2 on a checking NULL having `test`.`t2`.`a` is null)))) AS `t1.a in (select t2.a from t2)` from `test`.`t1`
+Note	1003	/* select#1 */ select `test`.`t1`.`a` AS `a`,<expr_cache><`test`.`t1`.`a`>(<in_optimizer>(`test`.`t1`.`a`,<exists>(<index_lookup>(<cache>(`test`.`t1`.`a`) in t2 on a checking NULL where <cache>(`test`.`t1`.`a`) = `test`.`t2`.`a` or `test`.`t2`.`a` is null having `test`.`t2`.`a` is null)))) AS `t1.a in (select t2.a from t2)` from `test`.`t1`
 CREATE TABLE t3 (a int(11) default '0');
 INSERT INTO t3 VALUES (1),(2),(3);
 SELECT t1.a, t1.a in (select t2.a from t2,t3 where t3.a=t2.a) FROM t1;
@@ -1702,27 +1702,27 @@ a3	1
 explain extended select s1, s1 NOT IN (SELECT s1 FROM t2) from t1;
 id	select_type	table	type	possible_keys	key	key_len	ref	rows	filtered	Extra
 1	PRIMARY	t1	index	NULL	s1	6	NULL	3	100.00	Using index
-2	SUBQUERY	t2	index_subquery	s1	s1	6	func	2	100.00	Using index; Full scan on NULL key
+2	DEPENDENT SUBQUERY	t2	index_subquery	s1	s1	6	func	2	100.00	Using index; Using where; Full scan on NULL key
 Warnings:
-Note	1003	/* select#1 */ select `test`.`t1`.`s1` AS `s1`,!<expr_cache><`test`.`t1`.`s1`>(<in_optimizer>(`test`.`t1`.`s1`,<exists>(<index_lookup>(<cache>(`test`.`t1`.`s1`) in t2 on s1 checking NULL having trigcond(`test`.`t2`.`s1` is null))))) AS `s1 NOT IN (SELECT s1 FROM t2)` from `test`.`t1`
+Note	1003	/* select#1 */ select `test`.`t1`.`s1` AS `s1`,!<expr_cache><`test`.`t1`.`s1`>(<in_optimizer>(`test`.`t1`.`s1`,<exists>(<index_lookup>(<cache>(`test`.`t1`.`s1`) in t2 on s1 checking NULL where trigcond(<cache>(`test`.`t1`.`s1`) = `test`.`t2`.`s1` or `test`.`t2`.`s1` is null) having trigcond(`test`.`t2`.`s1` is null))))) AS `s1 NOT IN (SELECT s1 FROM t2)` from `test`.`t1`
 explain extended select s1, s1 = ANY (SELECT s1 FROM t2) from t1;
 id	select_type	table	type	possible_keys	key	key_len	ref	rows	filtered	Extra
 1	PRIMARY	t1	index	NULL	s1	6	NULL	3	100.00	Using index
-2	SUBQUERY	t2	index_subquery	s1	s1	6	func	2	100.00	Using index; Full scan on NULL key
+2	DEPENDENT SUBQUERY	t2	index_subquery	s1	s1	6	func	2	100.00	Using index; Using where; Full scan on NULL key
 Warnings:
-Note	1003	/* select#1 */ select `test`.`t1`.`s1` AS `s1`,<expr_cache><`test`.`t1`.`s1`>(<in_optimizer>(`test`.`t1`.`s1`,<exists>(<index_lookup>(<cache>(`test`.`t1`.`s1`) in t2 on s1 checking NULL having trigcond(`test`.`t2`.`s1` is null))))) AS `s1 = ANY (SELECT s1 FROM t2)` from `test`.`t1`
+Note	1003	/* select#1 */ select `test`.`t1`.`s1` AS `s1`,<expr_cache><`test`.`t1`.`s1`>(<in_optimizer>(`test`.`t1`.`s1`,<exists>(<index_lookup>(<cache>(`test`.`t1`.`s1`) in t2 on s1 checking NULL where trigcond(<cache>(`test`.`t1`.`s1`) = `test`.`t2`.`s1` or `test`.`t2`.`s1` is null) having trigcond(`test`.`t2`.`s1` is null))))) AS `s1 = ANY (SELECT s1 FROM t2)` from `test`.`t1`
 explain extended select s1, s1 <> ALL (SELECT s1 FROM t2) from t1;
 id	select_type	table	type	possible_keys	key	key_len	ref	rows	filtered	Extra
 1	PRIMARY	t1	index	NULL	s1	6	NULL	3	100.00	Using index
-2	SUBQUERY	t2	index_subquery	s1	s1	6	func	2	100.00	Using index; Full scan on NULL key
+2	DEPENDENT SUBQUERY	t2	index_subquery	s1	s1	6	func	2	100.00	Using index; Using where; Full scan on NULL key
 Warnings:
-Note	1003	/* select#1 */ select `test`.`t1`.`s1` AS `s1`,!<expr_cache><`test`.`t1`.`s1`>(<in_optimizer>(`test`.`t1`.`s1`,<exists>(<index_lookup>(<cache>(`test`.`t1`.`s1`) in t2 on s1 checking NULL having trigcond(`test`.`t2`.`s1` is null))))) AS `s1 <> ALL (SELECT s1 FROM t2)` from `test`.`t1`
+Note	1003	/* select#1 */ select `test`.`t1`.`s1` AS `s1`,!<expr_cache><`test`.`t1`.`s1`>(<in_optimizer>(`test`.`t1`.`s1`,<exists>(<index_lookup>(<cache>(`test`.`t1`.`s1`) in t2 on s1 checking NULL where trigcond(<cache>(`test`.`t1`.`s1`) = `test`.`t2`.`s1` or `test`.`t2`.`s1` is null) having trigcond(`test`.`t2`.`s1` is null))))) AS `s1 <> ALL (SELECT s1 FROM t2)` from `test`.`t1`
 explain extended select s1, s1 NOT IN (SELECT s1 FROM t2 WHERE s1 < 'a2') from t1;
 id	select_type	table	type	possible_keys	key	key_len	ref	rows	filtered	Extra
 1	PRIMARY	t1	index	NULL	s1	6	NULL	3	100.00	Using index
-2	SUBQUERY	t2	index_subquery	s1	s1	6	func	2	50.00	Using index; Using where; Full scan on NULL key
+2	DEPENDENT SUBQUERY	t2	index_subquery	s1	s1	6	func	2	50.00	Using index; Using where; Full scan on NULL key
 Warnings:
-Note	1003	/* select#1 */ select `test`.`t1`.`s1` AS `s1`,!<expr_cache><`test`.`t1`.`s1`>(<in_optimizer>(`test`.`t1`.`s1`,<exists>(<index_lookup>(<cache>(`test`.`t1`.`s1`) in t2 on s1 checking NULL where `test`.`t2`.`s1` < 'a2' having trigcond(`test`.`t2`.`s1` is null))))) AS `s1 NOT IN (SELECT s1 FROM t2 WHERE s1 < 'a2')` from `test`.`t1`
+Note	1003	/* select#1 */ select `test`.`t1`.`s1` AS `s1`,!<expr_cache><`test`.`t1`.`s1`>(<in_optimizer>(`test`.`t1`.`s1`,<exists>(<index_lookup>(<cache>(`test`.`t1`.`s1`) in t2 on s1 checking NULL where `test`.`t2`.`s1` < 'a2' and trigcond(<cache>(`test`.`t1`.`s1`) = `test`.`t2`.`s1` or `test`.`t2`.`s1` is null) having trigcond(`test`.`t2`.`s1` is null))))) AS `s1 NOT IN (SELECT s1 FROM t2 WHERE s1 < 'a2')` from `test`.`t1`
 drop table t1,t2;
 create table t2 (a int, b int not null);
 create table t3 (a int);
@@ -3274,7 +3274,7 @@ INSERT INTO t2 VALUES (1),(2),(3);
 EXPLAIN SELECT a, a IN (SELECT a FROM t1) FROM t2;
 id	select_type	table	type	possible_keys	key	key_len	ref	rows	Extra
 1	PRIMARY	t2	ALL	NULL	NULL	NULL	NULL	3	
-2	SUBQUERY	t1	index_subquery	a	a	5	func	3	Using index; Full scan on NULL key
+2	DEPENDENT SUBQUERY	t1	index_subquery	a	a	5	func	3	Using index; Using where; Full scan on NULL key
 SELECT a, a IN (SELECT a FROM t1) FROM t2;
 a	a IN (SELECT a FROM t1)
 1	1
@@ -6760,7 +6760,7 @@ SET @@optimizer_switch='semijoin=off,materialization=off,in_to_exists=on,subquer
 EXPLAIN SELECT * FROM t1 WHERE a IN (SELECT a AS field1 FROM t1 GROUP BY field1);
 id	select_type	table	type	possible_keys	key	key_len	ref	rows	Extra
 1	PRIMARY	t1	index	NULL	a	4	NULL	2	Using where; Using index
-2	DEPENDENT SUBQUERY	t1	index_subquery	a	a	4	func	1	Using index
+2	SUBQUERY	t1	index_subquery	a	a	4	func	1	Using index
 SELECT * FROM t1 WHERE a IN (SELECT a AS field1 FROM t1 GROUP BY field1);
 a
 2009-01-01
--- a/mysql-test/main/subselect3.result
+++ b/mysql-test/main/subselect3.result
@@ -99,7 +99,7 @@ id	select_type	table	type	possible_keys	key	key_len	ref	rows	filtered	Extra
 2	DEPENDENT SUBQUERY	t1	index_subquery	a	a	5	func	3	100.00	Using where; Full scan on NULL key
 Warnings:
 Note	1276	Field or reference 'test.t2.oref' of SELECT #2 was resolved in SELECT #1
-Note	1003	/* select#1 */ select `test`.`t2`.`oref` AS `oref`,`test`.`t2`.`a` AS `a`,<expr_cache><`test`.`t2`.`a`,`test`.`t2`.`oref`>(<in_optimizer>(`test`.`t2`.`a`,<exists>(<index_lookup>(<cache>(`test`.`t2`.`a`) in t1 on a checking NULL where `test`.`t1`.`oref` = `test`.`t2`.`oref` having trigcond(`test`.`t1`.`a` is null))))) AS `Z` from `test`.`t2`
+Note	1003	/* select#1 */ select `test`.`t2`.`oref` AS `oref`,`test`.`t2`.`a` AS `a`,<expr_cache><`test`.`t2`.`a`,`test`.`t2`.`oref`>(<in_optimizer>(`test`.`t2`.`a`,<exists>(<index_lookup>(<cache>(`test`.`t2`.`a`) in t1 on a checking NULL where `test`.`t1`.`oref` = `test`.`t2`.`oref` and trigcond(<cache>(`test`.`t2`.`a`) = `test`.`t1`.`a` or `test`.`t1`.`a` is null) having trigcond(`test`.`t1`.`a` is null))))) AS `Z` from `test`.`t2`
 flush status;
 select oref, a from t2 where a in (select a from t1 where oref=t2.oref);
 oref	a
--- a/mysql-test/main/subselect3_jcl6.result
+++ b/mysql-test/main/subselect3_jcl6.result
@@ -102,7 +102,7 @@ id	select_type	table	type	possible_keys	key	key_len	ref	rows	filtered	Extra
 2	DEPENDENT SUBQUERY	t1	index_subquery	a	a	5	func	3	100.00	Using where; Full scan on NULL key
 Warnings:
 Note	1276	Field or reference 'test.t2.oref' of SELECT #2 was resolved in SELECT #1
-Note	1003	/* select#1 */ select `test`.`t2`.`oref` AS `oref`,`test`.`t2`.`a` AS `a`,<expr_cache><`test`.`t2`.`a`,`test`.`t2`.`oref`>(<in_optimizer>(`test`.`t2`.`a`,<exists>(<index_lookup>(<cache>(`test`.`t2`.`a`) in t1 on a checking NULL where `test`.`t1`.`oref` = `test`.`t2`.`oref` having trigcond(`test`.`t1`.`a` is null))))) AS `Z` from `test`.`t2`
+Note	1003	/* select#1 */ select `test`.`t2`.`oref` AS `oref`,`test`.`t2`.`a` AS `a`,<expr_cache><`test`.`t2`.`a`,`test`.`t2`.`oref`>(<in_optimizer>(`test`.`t2`.`a`,<exists>(<index_lookup>(<cache>(`test`.`t2`.`a`) in t1 on a checking NULL where `test`.`t1`.`oref` = `test`.`t2`.`oref` and trigcond(<cache>(`test`.`t2`.`a`) = `test`.`t1`.`a` or `test`.`t1`.`a` is null) having trigcond(`test`.`t1`.`a` is null))))) AS `Z` from `test`.`t2`
 flush status;
 select oref, a from t2 where a in (select a from t1 where oref=t2.oref);
 oref	a
--- a/mysql-test/main/subselect4.result
+++ b/mysql-test/main/subselect4.result
@@ -1145,7 +1145,7 @@ WHERE (t2.pk = t1.pk) AND t2.pk IN (SELECT f2 FROM t1);
 id	select_type	table	type	possible_keys	key	key_len	ref	rows	Extra
 1	PRIMARY	t2	system	PRIMARY	NULL	NULL	NULL	1	
 1	PRIMARY	t1	const	PRIMARY	PRIMARY	4	const	1	
-2	DEPENDENT SUBQUERY	t1	index_subquery	f2	f2	4	func	1	Using index
+2	SUBQUERY	t1	index_subquery	f2	f2	4	func	1	Using index
 SELECT t1.f3, MAX(t1.f2)
 FROM t1, t2
 WHERE (t2.pk = t1.pk) AND t2.pk IN (SELECT f2 FROM t1);
@@ -1364,7 +1364,7 @@ EXPLAIN
 SELECT i FROM t1 WHERE (1) NOT IN (SELECT i FROM t2);
 id	select_type	table	type	possible_keys	key	key_len	ref	rows	Extra
 1	PRIMARY	t1	system	NULL	NULL	NULL	NULL	1	
-2	SUBQUERY	t2	index_subquery	k	k	5	const	2	Using index
+2	SUBQUERY	t2	index_subquery	k	k	5	const	2	Using index; Using where
 DROP TABLE t2;
 DROP TABLE t1;
 #
@@ -1555,7 +1555,7 @@ EXPLAIN
 SELECT ( 5 ) IN ( SELECT * FROM v2 );
 id	select_type	table	type	possible_keys	key	key_len	ref	rows	Extra
 1	PRIMARY	NULL	NULL	NULL	NULL	NULL	NULL	NULL	No tables used
-2	SUBQUERY	<derived3>	index_subquery	NULL	distinct_key	5	const	2	
+2	SUBQUERY	<derived3>	index_subquery	NULL	distinct_key	5	const	2	Using where
 3	DERIVED	t1	system	NULL	NULL	NULL	NULL	1	
 4	UNION	t2	system	NULL	NULL	NULL	NULL	1	
 NULL	UNION RESULT	<union3,4>	ALL	NULL	NULL	NULL	NULL	NULL	
@@ -1608,7 +1608,7 @@ EXPLAIN
 SELECT ( 5 ) IN ( SELECT * FROM v2 );
 id	select_type	table	type	possible_keys	key	key_len	ref	rows	Extra
 1	PRIMARY	NULL	NULL	NULL	NULL	NULL	NULL	NULL	No tables used
-2	SUBQUERY	<derived3>	index_subquery	NULL	distinct_key	5	const	2	
+2	SUBQUERY	<derived3>	index_subquery	NULL	distinct_key	5	const	2	Using where
 3	DERIVED	t1	system	NULL	NULL	NULL	NULL	1	
 4	UNION	t2	system	NULL	NULL	NULL	NULL	1	
 NULL	UNION RESULT	<union3,4>	ALL	NULL	NULL	NULL	NULL	NULL	
--- a/mysql-test/main/subselect_exists2in.result
+++ b/mysql-test/main/subselect_exists2in.result
@@ -65,7 +65,7 @@ explain extended
 SELECT * FROM t1 WHERE EXISTS ( SELECT a FROM t3 WHERE t3.b = t1.a);
 id	select_type	table	type	possible_keys	key	key_len	ref	rows	filtered	Extra
 1	PRIMARY	t1	index	NULL	aa	4	NULL	2	100.00	Using where; Using index
-2	DEPENDENT SUBQUERY	t3	index_subquery	bb	bb	4	func	1	100.00	
+2	SUBQUERY	t3	index_subquery	bb	bb	4	func	1	100.00	
 Warnings:
 Note	1276	Field or reference 'test.t1.a' of SELECT #2 was resolved in SELECT #1
 Note	1003	/* select#1 */ select `test`.`t1`.`a` AS `a` from `test`.`t1` where <in_optimizer>(`test`.`t1`.`a`,<exists>(<index_lookup>(<cache>(`test`.`t1`.`a`) in t3 on bb)))
--- a/mysql-test/main/subselect_mat_cost.result
+++ b/mysql-test/main/subselect_mat_cost.result
@@ -481,7 +481,7 @@ from City
 where City.population > 10000000;
 id	select_type	table	type	possible_keys	key	key_len	ref	rows	Extra
 1	PRIMARY	City	range	Population	Population	5	NULL	3	Using index condition; Rowid-ordered scan
-2	SUBQUERY	Country	index_subquery	CountryCapital	CountryCapital	5	func	2	Using index; Using where
+2	DEPENDENT SUBQUERY	Country	index_subquery	CountryCapital	CountryCapital	5	func	2	Using index; Using where
 select Name, City.id in (select capital from Country where capital is not null) as is_capital
 from City
 where City.population > 10000000;
--- a/mysql-test/main/subselect_no_exists_to_in.result
+++ b/mysql-test/main/subselect_no_exists_to_in.result
@@ -997,9 +997,9 @@ a	t1.a in (select t2.a from t2)
 explain extended SELECT t1.a, t1.a in (select t2.a from t2) FROM t1;
 id	select_type	table	type	possible_keys	key	key_len	ref	rows	filtered	Extra
 1	PRIMARY	t1	index	NULL	PRIMARY	4	NULL	4	100.00	Using index
-2	SUBQUERY	t2	index_subquery	a	a	5	func	2	100.00	Using index
+2	DEPENDENT SUBQUERY	t2	index_subquery	a	a	5	func	2	100.00	Using index; Using where
 Warnings:
-Note	1003	/* select#1 */ select `test`.`t1`.`a` AS `a`,<expr_cache><`test`.`t1`.`a`>(<in_optimizer>(`test`.`t1`.`a`,<exists>(<index_lookup>(<cache>(`test`.`t1`.`a`) in t2 on a checking NULL having `test`.`t2`.`a` is null)))) AS `t1.a in (select t2.a from t2)` from `test`.`t1`
+Note	1003	/* select#1 */ select `test`.`t1`.`a` AS `a`,<expr_cache><`test`.`t1`.`a`>(<in_optimizer>(`test`.`t1`.`a`,<exists>(<index_lookup>(<cache>(`test`.`t1`.`a`) in t2 on a checking NULL where <cache>(`test`.`t1`.`a`) = `test`.`t2`.`a` or `test`.`t2`.`a` is null having `test`.`t2`.`a` is null)))) AS `t1.a in (select t2.a from t2)` from `test`.`t1`
 CREATE TABLE t3 (a int(11) default '0');
 INSERT INTO t3 VALUES (1),(2),(3);
 SELECT t1.a, t1.a in (select t2.a from t2,t3 where t3.a=t2.a) FROM t1;
@@ -1706,27 +1706,27 @@ a3	1
 explain extended select s1, s1 NOT IN (SELECT s1 FROM t2) from t1;
 id	select_type	table	type	possible_keys	key	key_len	ref	rows	filtered	Extra
 1	PRIMARY	t1	index	NULL	s1	6	NULL	3	100.00	Using index
-2	SUBQUERY	t2	index_subquery	s1	s1	6	func	2	100.00	Using index; Full scan on NULL key
+2	DEPENDENT SUBQUERY	t2	index_subquery	s1	s1	6	func	2	100.00	Using index; Using where; Full scan on NULL key
 Warnings:
-Note	1003	/* select#1 */ select `test`.`t1`.`s1` AS `s1`,!<expr_cache><`test`.`t1`.`s1`>(<in_optimizer>(`test`.`t1`.`s1`,<exists>(<index_lookup>(<cache>(`test`.`t1`.`s1`) in t2 on s1 checking NULL having trigcond(`test`.`t2`.`s1` is null))))) AS `s1 NOT IN (SELECT s1 FROM t2)` from `test`.`t1`
+Note	1003	/* select#1 */ select `test`.`t1`.`s1` AS `s1`,!<expr_cache><`test`.`t1`.`s1`>(<in_optimizer>(`test`.`t1`.`s1`,<exists>(<index_lookup>(<cache>(`test`.`t1`.`s1`) in t2 on s1 checking NULL where trigcond(<cache>(`test`.`t1`.`s1`) = `test`.`t2`.`s1` or `test`.`t2`.`s1` is null) having trigcond(`test`.`t2`.`s1` is null))))) AS `s1 NOT IN (SELECT s1 FROM t2)` from `test`.`t1`
 explain extended select s1, s1 = ANY (SELECT s1 FROM t2) from t1;
 id	select_type	table	type	possible_keys	key	key_len	ref	rows	filtered	Extra
 1	PRIMARY	t1	index	NULL	s1	6	NULL	3	100.00	Using index
-2	SUBQUERY	t2	index_subquery	s1	s1	6	func	2	100.00	Using index; Full scan on NULL key
+2	DEPENDENT SUBQUERY	t2	index_subquery	s1	s1	6	func	2	100.00	Using index; Using where; Full scan on NULL key
 Warnings:
-Note	1003	/* select#1 */ select `test`.`t1`.`s1` AS `s1`,<expr_cache><`test`.`t1`.`s1`>(<in_optimizer>(`test`.`t1`.`s1`,<exists>(<index_lookup>(<cache>(`test`.`t1`.`s1`) in t2 on s1 checking NULL having trigcond(`test`.`t2`.`s1` is null))))) AS `s1 = ANY (SELECT s1 FROM t2)` from `test`.`t1`
+Note	1003	/* select#1 */ select `test`.`t1`.`s1` AS `s1`,<expr_cache><`test`.`t1`.`s1`>(<in_optimizer>(`test`.`t1`.`s1`,<exists>(<index_lookup>(<cache>(`test`.`t1`.`s1`) in t2 on s1 checking NULL where trigcond(<cache>(`test`.`t1`.`s1`) = `test`.`t2`.`s1` or `test`.`t2`.`s1` is null) having trigcond(`test`.`t2`.`s1` is null))))) AS `s1 = ANY (SELECT s1 FROM t2)` from `test`.`t1`
 explain extended select s1, s1 <> ALL (SELECT s1 FROM t2) from t1;
 id	select_type	table	type	possible_keys	key	key_len	ref	rows	filtered	Extra
 1	PRIMARY	t1	index	NULL	s1	6	NULL	3	100.00	Using index
-2	SUBQUERY	t2	index_subquery	s1	s1	6	func	2	100.00	Using index; Full scan on NULL key
+2	DEPENDENT SUBQUERY	t2	index_subquery	s1	s1	6	func	2	100.00	Using index; Using where; Full scan on NULL key
 Warnings:
-Note	1003	/* select#1 */ select `test`.`t1`.`s1` AS `s1`,!<expr_cache><`test`.`t1`.`s1`>(<in_optimizer>(`test`.`t1`.`s1`,<exists>(<index_lookup>(<cache>(`test`.`t1`.`s1`) in t2 on s1 checking NULL having trigcond(`test`.`t2`.`s1` is null))))) AS `s1 <> ALL (SELECT s1 FROM t2)` from `test`.`t1`
+Note	1003	/* select#1 */ select `test`.`t1`.`s1` AS `s1`,!<expr_cache><`test`.`t1`.`s1`>(<in_optimizer>(`test`.`t1`.`s1`,<exists>(<index_lookup>(<cache>(`test`.`t1`.`s1`) in t2 on s1 checking NULL where trigcond(<cache>(`test`.`t1`.`s1`) = `test`.`t2`.`s1` or `test`.`t2`.`s1` is null) having trigcond(`test`.`t2`.`s1` is null))))) AS `s1 <> ALL (SELECT s1 FROM t2)` from `test`.`t1`
 explain extended select s1, s1 NOT IN (SELECT s1 FROM t2 WHERE s1 < 'a2') from t1;
 id	select_type	table	type	possible_keys	key	key_len	ref	rows	filtered	Extra
 1	PRIMARY	t1	index	NULL	s1	6	NULL	3	100.00	Using index
-2	SUBQUERY	t2	index_subquery	s1	s1	6	func	2	50.00	Using index; Using where; Full scan on NULL key
+2	DEPENDENT SUBQUERY	t2	index_subquery	s1	s1	6	func	2	50.00	Using index; Using where; Full scan on NULL key
 Warnings:
-Note	1003	/* select#1 */ select `test`.`t1`.`s1` AS `s1`,!<expr_cache><`test`.`t1`.`s1`>(<in_optimizer>(`test`.`t1`.`s1`,<exists>(<index_lookup>(<cache>(`test`.`t1`.`s1`) in t2 on s1 checking NULL where `test`.`t2`.`s1` < 'a2' having trigcond(`test`.`t2`.`s1` is null))))) AS `s1 NOT IN (SELECT s1 FROM t2 WHERE s1 < 'a2')` from `test`.`t1`
+Note	1003	/* select#1 */ select `test`.`t1`.`s1` AS `s1`,!<expr_cache><`test`.`t1`.`s1`>(<in_optimizer>(`test`.`t1`.`s1`,<exists>(<index_lookup>(<cache>(`test`.`t1`.`s1`) in t2 on s1 checking NULL where `test`.`t2`.`s1` < 'a2' and trigcond(<cache>(`test`.`t1`.`s1`) = `test`.`t2`.`s1` or `test`.`t2`.`s1` is null) having trigcond(`test`.`t2`.`s1` is null))))) AS `s1 NOT IN (SELECT s1 FROM t2 WHERE s1 < 'a2')` from `test`.`t1`
 drop table t1,t2;
 create table t2 (a int, b int not null);
 create table t3 (a int);
@@ -3277,7 +3277,7 @@ INSERT INTO t2 VALUES (1),(2),(3);
 EXPLAIN SELECT a, a IN (SELECT a FROM t1) FROM t2;
 id	select_type	table	type	possible_keys	key	key_len	ref	rows	Extra
 1	PRIMARY	t2	ALL	NULL	NULL	NULL	NULL	3	
-2	SUBQUERY	t1	index_subquery	a	a	5	func	3	Using index; Full scan on NULL key
+2	DEPENDENT SUBQUERY	t1	index_subquery	a	a	5	func	3	Using index; Using where; Full scan on NULL key
 SELECT a, a IN (SELECT a FROM t1) FROM t2;
 a	a IN (SELECT a FROM t1)
 1	1
@@ -6762,7 +6762,7 @@ SET @@optimizer_switch='semijoin=off,materialization=off,in_to_exists=on,subquer
 EXPLAIN SELECT * FROM t1 WHERE a IN (SELECT a AS field1 FROM t1 GROUP BY field1);
 id	select_type	table	type	possible_keys	key	key_len	ref	rows	Extra
 1	PRIMARY	t1	index	NULL	a	4	NULL	2	Using where; Using index
-2	DEPENDENT SUBQUERY	t1	index_subquery	a	a	4	func	1	Using index
+2	SUBQUERY	t1	index_subquery	a	a	4	func	1	Using index
 SELECT * FROM t1 WHERE a IN (SELECT a AS field1 FROM t1 GROUP BY field1);
 a
 2009-01-01
--- a/mysql-test/main/subselect_no_mat.result
+++ b/mysql-test/main/subselect_no_mat.result
@@ -1000,9 +1000,9 @@ a	t1.a in (select t2.a from t2)
 explain extended SELECT t1.a, t1.a in (select t2.a from t2) FROM t1;
 id	select_type	table	type	possible_keys	key	key_len	ref	rows	filtered	Extra
 1	PRIMARY	t1	index	NULL	PRIMARY	4	NULL	4	100.00	Using index
-2	SUBQUERY	t2	index_subquery	a	a	5	func	2	100.00	Using index
+2	DEPENDENT SUBQUERY	t2	index_subquery	a	a	5	func	2	100.00	Using index; Using where
 Warnings:
-Note	1003	/* select#1 */ select `test`.`t1`.`a` AS `a`,<expr_cache><`test`.`t1`.`a`>(<in_optimizer>(`test`.`t1`.`a`,<exists>(<index_lookup>(<cache>(`test`.`t1`.`a`) in t2 on a checking NULL having `test`.`t2`.`a` is null)))) AS `t1.a in (select t2.a from t2)` from `test`.`t1`
+Note	1003	/* select#1 */ select `test`.`t1`.`a` AS `a`,<expr_cache><`test`.`t1`.`a`>(<in_optimizer>(`test`.`t1`.`a`,<exists>(<index_lookup>(<cache>(`test`.`t1`.`a`) in t2 on a checking NULL where <cache>(`test`.`t1`.`a`) = `test`.`t2`.`a` or `test`.`t2`.`a` is null having `test`.`t2`.`a` is null)))) AS `t1.a in (select t2.a from t2)` from `test`.`t1`
 CREATE TABLE t3 (a int(11) default '0');
 INSERT INTO t3 VALUES (1),(2),(3);
 SELECT t1.a, t1.a in (select t2.a from t2,t3 where t3.a=t2.a) FROM t1;
@@ -1709,27 +1709,27 @@ a3	1
 explain extended select s1, s1 NOT IN (SELECT s1 FROM t2) from t1;
 id	select_type	table	type	possible_keys	key	key_len	ref	rows	filtered	Extra
 1	PRIMARY	t1	index	NULL	s1	6	NULL	3	100.00	Using index
-2	SUBQUERY	t2	index_subquery	s1	s1	6	func	2	100.00	Using index; Full scan on NULL key
+2	DEPENDENT SUBQUERY	t2	index_subquery	s1	s1	6	func	2	100.00	Using index; Using where; Full scan on NULL key
 Warnings:
-Note	1003	/* select#1 */ select `test`.`t1`.`s1` AS `s1`,!<expr_cache><`test`.`t1`.`s1`>(<in_optimizer>(`test`.`t1`.`s1`,<exists>(<index_lookup>(<cache>(`test`.`t1`.`s1`) in t2 on s1 checking NULL having trigcond(`test`.`t2`.`s1` is null))))) AS `s1 NOT IN (SELECT s1 FROM t2)` from `test`.`t1`
+Note	1003	/* select#1 */ select `test`.`t1`.`s1` AS `s1`,!<expr_cache><`test`.`t1`.`s1`>(<in_optimizer>(`test`.`t1`.`s1`,<exists>(<index_lookup>(<cache>(`test`.`t1`.`s1`) in t2 on s1 checking NULL where trigcond(<cache>(`test`.`t1`.`s1`) = `test`.`t2`.`s1` or `test`.`t2`.`s1` is null) having trigcond(`test`.`t2`.`s1` is null))))) AS `s1 NOT IN (SELECT s1 FROM t2)` from `test`.`t1`
 explain extended select s1, s1 = ANY (SELECT s1 FROM t2) from t1;
 id	select_type	table	type	possible_keys	key	key_len	ref	rows	filtered	Extra
 1	PRIMARY	t1	index	NULL	s1	6	NULL	3	100.00	Using index
-2	SUBQUERY	t2	index_subquery	s1	s1	6	func	2	100.00	Using index; Full scan on NULL key
+2	DEPENDENT SUBQUERY	t2	index_subquery	s1	s1	6	func	2	100.00	Using index; Using where; Full scan on NULL key
 Warnings:
-Note	1003	/* select#1 */ select `test`.`t1`.`s1` AS `s1`,<expr_cache><`test`.`t1`.`s1`>(<in_optimizer>(`test`.`t1`.`s1`,<exists>(<index_lookup>(<cache>(`test`.`t1`.`s1`) in t2 on s1 checking NULL having trigcond(`test`.`t2`.`s1` is null))))) AS `s1 = ANY (SELECT s1 FROM t2)` from `test`.`t1`
+Note	1003	/* select#1 */ select `test`.`t1`.`s1` AS `s1`,<expr_cache><`test`.`t1`.`s1`>(<in_optimizer>(`test`.`t1`.`s1`,<exists>(<index_lookup>(<cache>(`test`.`t1`.`s1`) in t2 on s1 checking NULL where trigcond(<cache>(`test`.`t1`.`s1`) = `test`.`t2`.`s1` or `test`.`t2`.`s1` is null) having trigcond(`test`.`t2`.`s1` is null))))) AS `s1 = ANY (SELECT s1 FROM t2)` from `test`.`t1`
 explain extended select s1, s1 <> ALL (SELECT s1 FROM t2) from t1;
 id	select_type	table	type	possible_keys	key	key_len	ref	rows	filtered	Extra
 1	PRIMARY	t1	index	NULL	s1	6	NULL	3	100.00	Using index
-2	SUBQUERY	t2	index_subquery	s1	s1	6	func	2	100.00	Using index; Full scan on NULL key
+2	DEPENDENT SUBQUERY	t2	index_subquery	s1	s1	6	func	2	100.00	Using index; Using where; Full scan on NULL key
 Warnings:
-Note	1003	/* select#1 */ select `test`.`t1`.`s1` AS `s1`,!<expr_cache><`test`.`t1`.`s1`>(<in_optimizer>(`test`.`t1`.`s1`,<exists>(<index_lookup>(<cache>(`test`.`t1`.`s1`) in t2 on s1 checking NULL having trigcond(`test`.`t2`.`s1` is null))))) AS `s1 <> ALL (SELECT s1 FROM t2)` from `test`.`t1`
+Note	1003	/* select#1 */ select `test`.`t1`.`s1` AS `s1`,!<expr_cache><`test`.`t1`.`s1`>(<in_optimizer>(`test`.`t1`.`s1`,<exists>(<index_lookup>(<cache>(`test`.`t1`.`s1`) in t2 on s1 checking NULL where trigcond(<cache>(`test`.`t1`.`s1`) = `test`.`t2`.`s1` or `test`.`t2`.`s1` is null) having trigcond(`test`.`t2`.`s1` is null))))) AS `s1 <> ALL (SELECT s1 FROM t2)` from `test`.`t1`
 explain extended select s1, s1 NOT IN (SELECT s1 FROM t2 WHERE s1 < 'a2') from t1;
 id	select_type	table	type	possible_keys	key	key_len	ref	rows	filtered	Extra
 1	PRIMARY	t1	index	NULL	s1	6	NULL	3	100.00	Using index
-2	SUBQUERY	t2	index_subquery	s1	s1	6	func	2	50.00	Using index; Using where; Full scan on NULL key
+2	DEPENDENT SUBQUERY	t2	index_subquery	s1	s1	6	func	2	50.00	Using index; Using where; Full scan on NULL key
 Warnings:
-Note	1003	/* select#1 */ select `test`.`t1`.`s1` AS `s1`,!<expr_cache><`test`.`t1`.`s1`>(<in_optimizer>(`test`.`t1`.`s1`,<exists>(<index_lookup>(<cache>(`test`.`t1`.`s1`) in t2 on s1 checking NULL where `test`.`t2`.`s1` < 'a2' having trigcond(`test`.`t2`.`s1` is null))))) AS `s1 NOT IN (SELECT s1 FROM t2 WHERE s1 < 'a2')` from `test`.`t1`
+Note	1003	/* select#1 */ select `test`.`t1`.`s1` AS `s1`,!<expr_cache><`test`.`t1`.`s1`>(<in_optimizer>(`test`.`t1`.`s1`,<exists>(<index_lookup>(<cache>(`test`.`t1`.`s1`) in t2 on s1 checking NULL where `test`.`t2`.`s1` < 'a2' and trigcond(<cache>(`test`.`t1`.`s1`) = `test`.`t2`.`s1` or `test`.`t2`.`s1` is null) having trigcond(`test`.`t2`.`s1` is null))))) AS `s1 NOT IN (SELECT s1 FROM t2 WHERE s1 < 'a2')` from `test`.`t1`
 drop table t1,t2;
 create table t2 (a int, b int not null);
 create table t3 (a int);
@@ -3279,7 +3279,7 @@ INSERT INTO t2 VALUES (1),(2),(3);
 EXPLAIN SELECT a, a IN (SELECT a FROM t1) FROM t2;
 id	select_type	table	type	possible_keys	key	key_len	ref	rows	Extra
 1	PRIMARY	t2	ALL	NULL	NULL	NULL	NULL	3	
-2	SUBQUERY	t1	index_subquery	a	a	5	func	3	Using index; Full scan on NULL key
+2	DEPENDENT SUBQUERY	t1	index_subquery	a	a	5	func	3	Using index; Using where; Full scan on NULL key
 SELECT a, a IN (SELECT a FROM t1) FROM t2;
 a	a IN (SELECT a FROM t1)
 1	1
@@ -6759,7 +6759,7 @@ SET @@optimizer_switch='semijoin=off,materialization=off,in_to_exists=on,subquer
 EXPLAIN SELECT * FROM t1 WHERE a IN (SELECT a AS field1 FROM t1 GROUP BY field1);
 id	select_type	table	type	possible_keys	key	key_len	ref	rows	Extra
 1	PRIMARY	t1	index	NULL	a	4	NULL	2	Using where; Using index
-2	DEPENDENT SUBQUERY	t1	index_subquery	a	a	4	func	1	Using index
+2	SUBQUERY	t1	index_subquery	a	a	4	func	1	Using index
 SELECT * FROM t1 WHERE a IN (SELECT a AS field1 FROM t1 GROUP BY field1);
 a
 2009-01-01
--- a/mysql-test/main/subselect_no_opts.result
+++ b/mysql-test/main/subselect_no_opts.result
@@ -368,7 +368,7 @@ patient_uq	clinic_uq
 explain extended select * from t6 where exists (select * from t7 where uq = clinic_uq);
 id	select_type	table	type	possible_keys	key	key_len	ref	rows	filtered	Extra
 1	PRIMARY	t6	ALL	NULL	NULL	NULL	NULL	4	100.00	Using where
-2	DEPENDENT SUBQUERY	t7	unique_subquery	PRIMARY	PRIMARY	4	func	1	100.00	Using index
+2	SUBQUERY	t7	unique_subquery	PRIMARY	PRIMARY	4	func	1	100.00	Using index
 Warnings:
 Note	1276	Field or reference 'test.t6.clinic_uq' of SELECT #2 was resolved in SELECT #1
 Note	1003	/* select#1 */ select `test`.`t6`.`patient_uq` AS `patient_uq`,`test`.`t6`.`clinic_uq` AS `clinic_uq` from `test`.`t6` where <in_optimizer>(`test`.`t6`.`clinic_uq`,<exists>(<primary_index_lookup>(<cache>(`test`.`t6`.`clinic_uq`) in t7 on PRIMARY)))
@@ -996,9 +996,9 @@ a	t1.a in (select t2.a from t2)
 explain extended SELECT t1.a, t1.a in (select t2.a from t2) FROM t1;
 id	select_type	table	type	possible_keys	key	key_len	ref	rows	filtered	Extra
 1	PRIMARY	t1	index	NULL	PRIMARY	4	NULL	4	100.00	Using index
-2	SUBQUERY	t2	index_subquery	a	a	5	func	2	100.00	Using index
+2	DEPENDENT SUBQUERY	t2	index_subquery	a	a	5	func	2	100.00	Using index; Using where
 Warnings:
-Note	1003	/* select#1 */ select `test`.`t1`.`a` AS `a`,<in_optimizer>(`test`.`t1`.`a`,<exists>(<index_lookup>(<cache>(`test`.`t1`.`a`) in t2 on a checking NULL having `test`.`t2`.`a` is null))) AS `t1.a in (select t2.a from t2)` from `test`.`t1`
+Note	1003	/* select#1 */ select `test`.`t1`.`a` AS `a`,<in_optimizer>(`test`.`t1`.`a`,<exists>(<index_lookup>(<cache>(`test`.`t1`.`a`) in t2 on a checking NULL where <cache>(`test`.`t1`.`a`) = `test`.`t2`.`a` or `test`.`t2`.`a` is null having `test`.`t2`.`a` is null))) AS `t1.a in (select t2.a from t2)` from `test`.`t1`
 CREATE TABLE t3 (a int(11) default '0');
 INSERT INTO t3 VALUES (1),(2),(3);
 SELECT t1.a, t1.a in (select t2.a from t2,t3 where t3.a=t2.a) FROM t1;
@@ -1531,7 +1531,7 @@ a
 explain extended select * from t2 where t2.a in (select a from t1);
 id	select_type	table	type	possible_keys	key	key_len	ref	rows	filtered	Extra
 1	PRIMARY	t2	index	NULL	PRIMARY	4	NULL	4	100.00	Using where; Using index
-2	DEPENDENT SUBQUERY	t1	unique_subquery	PRIMARY	PRIMARY	4	func	1	100.00	Using index
+2	SUBQUERY	t1	unique_subquery	PRIMARY	PRIMARY	4	func	1	100.00	Using index
 Warnings:
 Note	1003	/* select#1 */ select `test`.`t2`.`a` AS `a` from `test`.`t2` where <in_optimizer>(`test`.`t2`.`a`,<exists>(<primary_index_lookup>(<cache>(`test`.`t2`.`a`) in t1 on PRIMARY)))
 select * from t2 where t2.a in (select a from t1 where t1.b <> 30);
@@ -1569,7 +1569,7 @@ insert into t3 values (10,3), (20,4), (30,5);
 explain extended select * from t2 where t2.a in (select a from t1);
 id	select_type	table	type	possible_keys	key	key_len	ref	rows	filtered	Extra
 1	PRIMARY	t2	index	NULL	a	5	NULL	4	100.00	Using where; Using index
-2	DEPENDENT SUBQUERY	t1	index_subquery	a	a	5	func	1001	100.00	Using index
+2	SUBQUERY	t1	index_subquery	a	a	5	func	1001	100.00	Using index
 Warnings:
 Note	1003	/* select#1 */ select `test`.`t2`.`a` AS `a` from `test`.`t2` where <in_optimizer>(`test`.`t2`.`a`,<exists>(<index_lookup>(<cache>(`test`.`t2`.`a`) in t1 on a)))
 select * from t2 where t2.a in (select a from t1);
@@ -1705,27 +1705,27 @@ a3	1
 explain extended select s1, s1 NOT IN (SELECT s1 FROM t2) from t1;
 id	select_type	table	type	possible_keys	key	key_len	ref	rows	filtered	Extra
 1	PRIMARY	t1	index	NULL	s1	6	NULL	3	100.00	Using index
-2	SUBQUERY	t2	index_subquery	s1	s1	6	func	2	100.00	Using index; Full scan on NULL key
+2	DEPENDENT SUBQUERY	t2	index_subquery	s1	s1	6	func	2	100.00	Using index; Using where; Full scan on NULL key
 Warnings:
-Note	1003	/* select#1 */ select `test`.`t1`.`s1` AS `s1`,!(<in_optimizer>(`test`.`t1`.`s1`,<exists>(<index_lookup>(<cache>(`test`.`t1`.`s1`) in t2 on s1 checking NULL having trigcond(`test`.`t2`.`s1` is null))))) AS `s1 NOT IN (SELECT s1 FROM t2)` from `test`.`t1`
+Note	1003	/* select#1 */ select `test`.`t1`.`s1` AS `s1`,!(<in_optimizer>(`test`.`t1`.`s1`,<exists>(<index_lookup>(<cache>(`test`.`t1`.`s1`) in t2 on s1 checking NULL where trigcond(<cache>(`test`.`t1`.`s1`) = `test`.`t2`.`s1` or `test`.`t2`.`s1` is null) having trigcond(`test`.`t2`.`s1` is null))))) AS `s1 NOT IN (SELECT s1 FROM t2)` from `test`.`t1`
 explain extended select s1, s1 = ANY (SELECT s1 FROM t2) from t1;
 id	select_type	table	type	possible_keys	key	key_len	ref	rows	filtered	Extra
 1	PRIMARY	t1	index	NULL	s1	6	NULL	3	100.00	Using index
-2	SUBQUERY	t2	index_subquery	s1	s1	6	func	2	100.00	Using index; Full scan on NULL key
+2	DEPENDENT SUBQUERY	t2	index_subquery	s1	s1	6	func	2	100.00	Using index; Using where; Full scan on NULL key
 Warnings:
-Note	1003	/* select#1 */ select `test`.`t1`.`s1` AS `s1`,<in_optimizer>(`test`.`t1`.`s1`,<exists>(<index_lookup>(<cache>(`test`.`t1`.`s1`) in t2 on s1 checking NULL having trigcond(`test`.`t2`.`s1` is null)))) AS `s1 = ANY (SELECT s1 FROM t2)` from `test`.`t1`
+Note	1003	/* select#1 */ select `test`.`t1`.`s1` AS `s1`,<in_optimizer>(`test`.`t1`.`s1`,<exists>(<index_lookup>(<cache>(`test`.`t1`.`s1`) in t2 on s1 checking NULL where trigcond(<cache>(`test`.`t1`.`s1`) = `test`.`t2`.`s1` or `test`.`t2`.`s1` is null) having trigcond(`test`.`t2`.`s1` is null)))) AS `s1 = ANY (SELECT s1 FROM t2)` from `test`.`t1`
 explain extended select s1, s1 <> ALL (SELECT s1 FROM t2) from t1;
 id	select_type	table	type	possible_keys	key	key_len	ref	rows	filtered	Extra
 1	PRIMARY	t1	index	NULL	s1	6	NULL	3	100.00	Using index
-2	SUBQUERY	t2	index_subquery	s1	s1	6	func	2	100.00	Using index; Full scan on NULL key
+2	DEPENDENT SUBQUERY	t2	index_subquery	s1	s1	6	func	2	100.00	Using index; Using where; Full scan on NULL key
 Warnings:
-Note	1003	/* select#1 */ select `test`.`t1`.`s1` AS `s1`,!(<in_optimizer>(`test`.`t1`.`s1`,<exists>(<index_lookup>(<cache>(`test`.`t1`.`s1`) in t2 on s1 checking NULL having trigcond(`test`.`t2`.`s1` is null))))) AS `s1 <> ALL (SELECT s1 FROM t2)` from `test`.`t1`
+Note	1003	/* select#1 */ select `test`.`t1`.`s1` AS `s1`,!(<in_optimizer>(`test`.`t1`.`s1`,<exists>(<index_lookup>(<cache>(`test`.`t1`.`s1`) in t2 on s1 checking NULL where trigcond(<cache>(`test`.`t1`.`s1`) = `test`.`t2`.`s1` or `test`.`t2`.`s1` is null) having trigcond(`test`.`t2`.`s1` is null))))) AS `s1 <> ALL (SELECT s1 FROM t2)` from `test`.`t1`
 explain extended select s1, s1 NOT IN (SELECT s1 FROM t2 WHERE s1 < 'a2') from t1;
 id	select_type	table	type	possible_keys	key	key_len	ref	rows	filtered	Extra
 1	PRIMARY	t1	index	NULL	s1	6	NULL	3	100.00	Using index
-2	SUBQUERY	t2	index_subquery	s1	s1	6	func	2	50.00	Using index; Using where; Full scan on NULL key
+2	DEPENDENT SUBQUERY	t2	index_subquery	s1	s1	6	func	2	50.00	Using index; Using where; Full scan on NULL key
 Warnings:
-Note	1003	/* select#1 */ select `test`.`t1`.`s1` AS `s1`,!(<in_optimizer>(`test`.`t1`.`s1`,<exists>(<index_lookup>(<cache>(`test`.`t1`.`s1`) in t2 on s1 checking NULL where `test`.`t2`.`s1` < 'a2' having trigcond(`test`.`t2`.`s1` is null))))) AS `s1 NOT IN (SELECT s1 FROM t2 WHERE s1 < 'a2')` from `test`.`t1`
+Note	1003	/* select#1 */ select `test`.`t1`.`s1` AS `s1`,!(<in_optimizer>(`test`.`t1`.`s1`,<exists>(<index_lookup>(<cache>(`test`.`t1`.`s1`) in t2 on s1 checking NULL where `test`.`t2`.`s1` < 'a2' and trigcond(<cache>(`test`.`t1`.`s1`) = `test`.`t2`.`s1` or `test`.`t2`.`s1` is null) having trigcond(`test`.`t2`.`s1` is null))))) AS `s1 NOT IN (SELECT s1 FROM t2 WHERE s1 < 'a2')` from `test`.`t1`
 drop table t1,t2;
 create table t2 (a int, b int not null);
 create table t3 (a int);
@@ -3275,7 +3275,7 @@ INSERT INTO t2 VALUES (1),(2),(3);
 EXPLAIN SELECT a, a IN (SELECT a FROM t1) FROM t2;
 id	select_type	table	type	possible_keys	key	key_len	ref	rows	Extra
 1	PRIMARY	t2	ALL	NULL	NULL	NULL	NULL	3	
-2	SUBQUERY	t1	index_subquery	a	a	5	func	3	Using index; Full scan on NULL key
+2	DEPENDENT SUBQUERY	t1	index_subquery	a	a	5	func	3	Using index; Using where; Full scan on NULL key
 SELECT a, a IN (SELECT a FROM t1) FROM t2;
 a	a IN (SELECT a FROM t1)
 1	1
@@ -5813,7 +5813,7 @@ SELECT * FROM t1
 WHERE EXISTS (SELECT a FROM t2 WHERE t2.a = t1.a);
 id	select_type	table	type	possible_keys	key	key_len	ref	rows	Extra
 1	PRIMARY	t1	ALL	NULL	NULL	NULL	NULL	4	Using where
-2	DEPENDENT SUBQUERY	t2	index_subquery	idx	idx	5	func	58	Using index
+2	SUBQUERY	t2	index_subquery	idx	idx	5	func	58	Using index
 DROP TABLE t1,t2;
 #
 # BUG#752992: Wrong results for a subquery with 'semijoin=on'
@@ -6755,7 +6755,7 @@ SET @@optimizer_switch='semijoin=off,materialization=off,in_to_exists=on,subquer
 EXPLAIN SELECT * FROM t1 WHERE a IN (SELECT a AS field1 FROM t1 GROUP BY field1);
 id	select_type	table	type	possible_keys	key	key_len	ref	rows	Extra
 1	PRIMARY	t1	index	NULL	a	4	NULL	2	Using where; Using index
-2	DEPENDENT SUBQUERY	t1	index_subquery	a	a	4	func	1	Using index
+2	SUBQUERY	t1	index_subquery	a	a	4	func	1	Using index
 SELECT * FROM t1 WHERE a IN (SELECT a AS field1 FROM t1 GROUP BY field1);
 a
 2009-01-01
--- a/mysql-test/main/subselect_no_scache.result
+++ b/mysql-test/main/subselect_no_scache.result
@@ -999,9 +999,9 @@ a	t1.a in (select t2.a from t2)
 explain extended SELECT t1.a, t1.a in (select t2.a from t2) FROM t1;
 id	select_type	table	type	possible_keys	key	key_len	ref	rows	filtered	Extra
 1	PRIMARY	t1	index	NULL	PRIMARY	4	NULL	4	100.00	Using index
-2	SUBQUERY	t2	index_subquery	a	a	5	func	2	100.00	Using index
+2	DEPENDENT SUBQUERY	t2	index_subquery	a	a	5	func	2	100.00	Using index; Using where
 Warnings:
-Note	1003	/* select#1 */ select `test`.`t1`.`a` AS `a`,<in_optimizer>(`test`.`t1`.`a`,<exists>(<index_lookup>(<cache>(`test`.`t1`.`a`) in t2 on a checking NULL having `test`.`t2`.`a` is null))) AS `t1.a in (select t2.a from t2)` from `test`.`t1`
+Note	1003	/* select#1 */ select `test`.`t1`.`a` AS `a`,<in_optimizer>(`test`.`t1`.`a`,<exists>(<index_lookup>(<cache>(`test`.`t1`.`a`) in t2 on a checking NULL where <cache>(`test`.`t1`.`a`) = `test`.`t2`.`a` or `test`.`t2`.`a` is null having `test`.`t2`.`a` is null))) AS `t1.a in (select t2.a from t2)` from `test`.`t1`
 CREATE TABLE t3 (a int(11) default '0');
 INSERT INTO t3 VALUES (1),(2),(3);
 SELECT t1.a, t1.a in (select t2.a from t2,t3 where t3.a=t2.a) FROM t1;
@@ -1708,27 +1708,27 @@ a3	1
 explain extended select s1, s1 NOT IN (SELECT s1 FROM t2) from t1;
 id	select_type	table	type	possible_keys	key	key_len	ref	rows	filtered	Extra
 1	PRIMARY	t1	index	NULL	s1	6	NULL	3	100.00	Using index
-2	SUBQUERY	t2	index_subquery	s1	s1	6	func	2	100.00	Using index; Full scan on NULL key
+2	DEPENDENT SUBQUERY	t2	index_subquery	s1	s1	6	func	2	100.00	Using index; Using where; Full scan on NULL key
 Warnings:
-Note	1003	/* select#1 */ select `test`.`t1`.`s1` AS `s1`,!(<in_optimizer>(`test`.`t1`.`s1`,<exists>(<index_lookup>(<cache>(`test`.`t1`.`s1`) in t2 on s1 checking NULL having trigcond(`test`.`t2`.`s1` is null))))) AS `s1 NOT IN (SELECT s1 FROM t2)` from `test`.`t1`
+Note	1003	/* select#1 */ select `test`.`t1`.`s1` AS `s1`,!(<in_optimizer>(`test`.`t1`.`s1`,<exists>(<index_lookup>(<cache>(`test`.`t1`.`s1`) in t2 on s1 checking NULL where trigcond(<cache>(`test`.`t1`.`s1`) = `test`.`t2`.`s1` or `test`.`t2`.`s1` is null) having trigcond(`test`.`t2`.`s1` is null))))) AS `s1 NOT IN (SELECT s1 FROM t2)` from `test`.`t1`
 explain extended select s1, s1 = ANY (SELECT s1 FROM t2) from t1;
 id	select_type	table	type	possible_keys	key	key_len	ref	rows	filtered	Extra
 1	PRIMARY	t1	index	NULL	s1	6	NULL	3	100.00	Using index
-2	SUBQUERY	t2	index_subquery	s1	s1	6	func	2	100.00	Using index; Full scan on NULL key
+2	DEPENDENT SUBQUERY	t2	index_subquery	s1	s1	6	func	2	100.00	Using index; Using where; Full scan on NULL key
 Warnings:
-Note	1003	/* select#1 */ select `test`.`t1`.`s1` AS `s1`,<in_optimizer>(`test`.`t1`.`s1`,<exists>(<index_lookup>(<cache>(`test`.`t1`.`s1`) in t2 on s1 checking NULL having trigcond(`test`.`t2`.`s1` is null)))) AS `s1 = ANY (SELECT s1 FROM t2)` from `test`.`t1`
+Note	1003	/* select#1 */ select `test`.`t1`.`s1` AS `s1`,<in_optimizer>(`test`.`t1`.`s1`,<exists>(<index_lookup>(<cache>(`test`.`t1`.`s1`) in t2 on s1 checking NULL where trigcond(<cache>(`test`.`t1`.`s1`) = `test`.`t2`.`s1` or `test`.`t2`.`s1` is null) having trigcond(`test`.`t2`.`s1` is null)))) AS `s1 = ANY (SELECT s1 FROM t2)` from `test`.`t1`
 explain extended select s1, s1 <> ALL (SELECT s1 FROM t2) from t1;
 id	select_type	table	type	possible_keys	key	key_len	ref	rows	filtered	Extra
 1	PRIMARY	t1	index	NULL	s1	6	NULL	3	100.00	Using index
-2	SUBQUERY	t2	index_subquery	s1	s1	6	func	2	100.00	Using index; Full scan on NULL key
+2	DEPENDENT SUBQUERY	t2	index_subquery	s1	s1	6	func	2	100.00	Using index; Using where; Full scan on NULL key
 Warnings:
-Note	1003	/* select#1 */ select `test`.`t1`.`s1` AS `s1`,!(<in_optimizer>(`test`.`t1`.`s1`,<exists>(<index_lookup>(<cache>(`test`.`t1`.`s1`) in t2 on s1 checking NULL having trigcond(`test`.`t2`.`s1` is null))))) AS `s1 <> ALL (SELECT s1 FROM t2)` from `test`.`t1`
+Note	1003	/* select#1 */ select `test`.`t1`.`s1` AS `s1`,!(<in_optimizer>(`test`.`t1`.`s1`,<exists>(<index_lookup>(<cache>(`test`.`t1`.`s1`) in t2 on s1 checking NULL where trigcond(<cache>(`test`.`t1`.`s1`) = `test`.`t2`.`s1` or `test`.`t2`.`s1` is null) having trigcond(`test`.`t2`.`s1` is null))))) AS `s1 <> ALL (SELECT s1 FROM t2)` from `test`.`t1`
 explain extended select s1, s1 NOT IN (SELECT s1 FROM t2 WHERE s1 < 'a2') from t1;
 id	select_type	table	type	possible_keys	key	key_len	ref	rows	filtered	Extra
 1	PRIMARY	t1	index	NULL	s1	6	NULL	3	100.00	Using index
-2	SUBQUERY	t2	index_subquery	s1	s1	6	func	2	50.00	Using index; Using where; Full scan on NULL key
+2	DEPENDENT SUBQUERY	t2	index_subquery	s1	s1	6	func	2	50.00	Using index; Using where; Full scan on NULL key
 Warnings:
-Note	1003	/* select#1 */ select `test`.`t1`.`s1` AS `s1`,!(<in_optimizer>(`test`.`t1`.`s1`,<exists>(<index_lookup>(<cache>(`test`.`t1`.`s1`) in t2 on s1 checking NULL where `test`.`t2`.`s1` < 'a2' having trigcond(`test`.`t2`.`s1` is null))))) AS `s1 NOT IN (SELECT s1 FROM t2 WHERE s1 < 'a2')` from `test`.`t1`
+Note	1003	/* select#1 */ select `test`.`t1`.`s1` AS `s1`,!(<in_optimizer>(`test`.`t1`.`s1`,<exists>(<index_lookup>(<cache>(`test`.`t1`.`s1`) in t2 on s1 checking NULL where `test`.`t2`.`s1` < 'a2' and trigcond(<cache>(`test`.`t1`.`s1`) = `test`.`t2`.`s1` or `test`.`t2`.`s1` is null) having trigcond(`test`.`t2`.`s1` is null))))) AS `s1 NOT IN (SELECT s1 FROM t2 WHERE s1 < 'a2')` from `test`.`t1`
 drop table t1,t2;
 create table t2 (a int, b int not null);
 create table t3 (a int);
@@ -3280,7 +3280,7 @@ INSERT INTO t2 VALUES (1),(2),(3);
 EXPLAIN SELECT a, a IN (SELECT a FROM t1) FROM t2;
 id	select_type	table	type	possible_keys	key	key_len	ref	rows	Extra
 1	PRIMARY	t2	ALL	NULL	NULL	NULL	NULL	3	
-2	SUBQUERY	t1	index_subquery	a	a	5	func	3	Using index; Full scan on NULL key
+2	DEPENDENT SUBQUERY	t1	index_subquery	a	a	5	func	3	Using index; Using where; Full scan on NULL key
 SELECT a, a IN (SELECT a FROM t1) FROM t2;
 a	a IN (SELECT a FROM t1)
 1	1
@@ -6766,7 +6766,7 @@ SET @@optimizer_switch='semijoin=off,materialization=off,in_to_exists=on,subquer
 EXPLAIN SELECT * FROM t1 WHERE a IN (SELECT a AS field1 FROM t1 GROUP BY field1);
 id	select_type	table	type	possible_keys	key	key_len	ref	rows	Extra
 1	PRIMARY	t1	index	NULL	a	4	NULL	2	Using where; Using index
-2	DEPENDENT SUBQUERY	t1	index_subquery	a	a	4	func	1	Using index
+2	SUBQUERY	t1	index_subquery	a	a	4	func	1	Using index
 SELECT * FROM t1 WHERE a IN (SELECT a AS field1 FROM t1 GROUP BY field1);
 a
 2009-01-01
--- a/mysql-test/main/subselect_no_semijoin.result
+++ b/mysql-test/main/subselect_no_semijoin.result
@@ -368,7 +368,7 @@ patient_uq	clinic_uq
 explain extended select * from t6 where exists (select * from t7 where uq = clinic_uq);
 id	select_type	table	type	possible_keys	key	key_len	ref	rows	filtered	Extra
 1	PRIMARY	t6	ALL	NULL	NULL	NULL	NULL	4	100.00	Using where
-2	DEPENDENT SUBQUERY	t7	unique_subquery	PRIMARY	PRIMARY	4	func	1	100.00	Using index
+2	SUBQUERY	t7	unique_subquery	PRIMARY	PRIMARY	4	func	1	100.00	Using index
 Warnings:
 Note	1276	Field or reference 'test.t6.clinic_uq' of SELECT #2 was resolved in SELECT #1
 Note	1003	/* select#1 */ select `test`.`t6`.`patient_uq` AS `patient_uq`,`test`.`t6`.`clinic_uq` AS `clinic_uq` from `test`.`t6` where <expr_cache><`test`.`t6`.`clinic_uq`>(<in_optimizer>(`test`.`t6`.`clinic_uq`,<exists>(<primary_index_lookup>(<cache>(`test`.`t6`.`clinic_uq`) in t7 on PRIMARY))))
@@ -996,9 +996,9 @@ a	t1.a in (select t2.a from t2)
 explain extended SELECT t1.a, t1.a in (select t2.a from t2) FROM t1;
 id	select_type	table	type	possible_keys	key	key_len	ref	rows	filtered	Extra
 1	PRIMARY	t1	index	NULL	PRIMARY	4	NULL	4	100.00	Using index
-2	SUBQUERY	t2	index_subquery	a	a	5	func	2	100.00	Using index
+2	DEPENDENT SUBQUERY	t2	index_subquery	a	a	5	func	2	100.00	Using index; Using where
 Warnings:
-Note	1003	/* select#1 */ select `test`.`t1`.`a` AS `a`,<expr_cache><`test`.`t1`.`a`>(<in_optimizer>(`test`.`t1`.`a`,<exists>(<index_lookup>(<cache>(`test`.`t1`.`a`) in t2 on a checking NULL having `test`.`t2`.`a` is null)))) AS `t1.a in (select t2.a from t2)` from `test`.`t1`
+Note	1003	/* select#1 */ select `test`.`t1`.`a` AS `a`,<expr_cache><`test`.`t1`.`a`>(<in_optimizer>(`test`.`t1`.`a`,<exists>(<index_lookup>(<cache>(`test`.`t1`.`a`) in t2 on a checking NULL where <cache>(`test`.`t1`.`a`) = `test`.`t2`.`a` or `test`.`t2`.`a` is null having `test`.`t2`.`a` is null)))) AS `t1.a in (select t2.a from t2)` from `test`.`t1`
 CREATE TABLE t3 (a int(11) default '0');
 INSERT INTO t3 VALUES (1),(2),(3);
 SELECT t1.a, t1.a in (select t2.a from t2,t3 where t3.a=t2.a) FROM t1;
@@ -1531,7 +1531,7 @@ a
 explain extended select * from t2 where t2.a in (select a from t1);
 id	select_type	table	type	possible_keys	key	key_len	ref	rows	filtered	Extra
 1	PRIMARY	t2	index	NULL	PRIMARY	4	NULL	4	100.00	Using where; Using index
-2	DEPENDENT SUBQUERY	t1	unique_subquery	PRIMARY	PRIMARY	4	func	1	100.00	Using index
+2	SUBQUERY	t1	unique_subquery	PRIMARY	PRIMARY	4	func	1	100.00	Using index
 Warnings:
 Note	1003	/* select#1 */ select `test`.`t2`.`a` AS `a` from `test`.`t2` where <expr_cache><`test`.`t2`.`a`>(<in_optimizer>(`test`.`t2`.`a`,<exists>(<primary_index_lookup>(<cache>(`test`.`t2`.`a`) in t1 on PRIMARY))))
 select * from t2 where t2.a in (select a from t1 where t1.b <> 30);
@@ -1569,7 +1569,7 @@ insert into t3 values (10,3), (20,4), (30,5);
 explain extended select * from t2 where t2.a in (select a from t1);
 id	select_type	table	type	possible_keys	key	key_len	ref	rows	filtered	Extra
 1	PRIMARY	t2	index	NULL	a	5	NULL	4	100.00	Using where; Using index
-2	DEPENDENT SUBQUERY	t1	index_subquery	a	a	5	func	1001	100.00	Using index
+2	SUBQUERY	t1	index_subquery	a	a	5	func	1001	100.00	Using index
 Warnings:
 Note	1003	/* select#1 */ select `test`.`t2`.`a` AS `a` from `test`.`t2` where <expr_cache><`test`.`t2`.`a`>(<in_optimizer>(`test`.`t2`.`a`,<exists>(<index_lookup>(<cache>(`test`.`t2`.`a`) in t1 on a))))
 select * from t2 where t2.a in (select a from t1);
@@ -1705,27 +1705,27 @@ a3	1
 explain extended select s1, s1 NOT IN (SELECT s1 FROM t2) from t1;
 id	select_type	table	type	possible_keys	key	key_len	ref	rows	filtered	Extra
 1	PRIMARY	t1	index	NULL	s1	6	NULL	3	100.00	Using index
-2	SUBQUERY	t2	index_subquery	s1	s1	6	func	2	100.00	Using index; Full scan on NULL key
+2	DEPENDENT SUBQUERY	t2	index_subquery	s1	s1	6	func	2	100.00	Using index; Using where; Full scan on NULL key
 Warnings:
-Note	1003	/* select#1 */ select `test`.`t1`.`s1` AS `s1`,!<expr_cache><`test`.`t1`.`s1`>(<in_optimizer>(`test`.`t1`.`s1`,<exists>(<index_lookup>(<cache>(`test`.`t1`.`s1`) in t2 on s1 checking NULL having trigcond(`test`.`t2`.`s1` is null))))) AS `s1 NOT IN (SELECT s1 FROM t2)` from `test`.`t1`
+Note	1003	/* select#1 */ select `test`.`t1`.`s1` AS `s1`,!<expr_cache><`test`.`t1`.`s1`>(<in_optimizer>(`test`.`t1`.`s1`,<exists>(<index_lookup>(<cache>(`test`.`t1`.`s1`) in t2 on s1 checking NULL where trigcond(<cache>(`test`.`t1`.`s1`) = `test`.`t2`.`s1` or `test`.`t2`.`s1` is null) having trigcond(`test`.`t2`.`s1` is null))))) AS `s1 NOT IN (SELECT s1 FROM t2)` from `test`.`t1`
 explain extended select s1, s1 = ANY (SELECT s1 FROM t2) from t1;
 id	select_type	table	type	possible_keys	key	key_len	ref	rows	filtered	Extra
 1	PRIMARY	t1	index	NULL	s1	6	NULL	3	100.00	Using index
-2	SUBQUERY	t2	index_subquery	s1	s1	6	func	2	100.00	Using index; Full scan on NULL key
+2	DEPENDENT SUBQUERY	t2	index_subquery	s1	s1	6	func	2	100.00	Using index; Using where; Full scan on NULL key
 Warnings:
-Note	1003	/* select#1 */ select `test`.`t1`.`s1` AS `s1`,<expr_cache><`test`.`t1`.`s1`>(<in_optimizer>(`test`.`t1`.`s1`,<exists>(<index_lookup>(<cache>(`test`.`t1`.`s1`) in t2 on s1 checking NULL having trigcond(`test`.`t2`.`s1` is null))))) AS `s1 = ANY (SELECT s1 FROM t2)` from `test`.`t1`
+Note	1003	/* select#1 */ select `test`.`t1`.`s1` AS `s1`,<expr_cache><`test`.`t1`.`s1`>(<in_optimizer>(`test`.`t1`.`s1`,<exists>(<index_lookup>(<cache>(`test`.`t1`.`s1`) in t2 on s1 checking NULL where trigcond(<cache>(`test`.`t1`.`s1`) = `test`.`t2`.`s1` or `test`.`t2`.`s1` is null) having trigcond(`test`.`t2`.`s1` is null))))) AS `s1 = ANY (SELECT s1 FROM t2)` from `test`.`t1`
 explain extended select s1, s1 <> ALL (SELECT s1 FROM t2) from t1;
 id	select_type	table	type	possible_keys	key	key_len	ref	rows	filtered	Extra
 1	PRIMARY	t1	index	NULL	s1	6	NULL	3	100.00	Using index
-2	SUBQUERY	t2	index_subquery	s1	s1	6	func	2	100.00	Using index; Full scan on NULL key
+2	DEPENDENT SUBQUERY	t2	index_subquery	s1	s1	6	func	2	100.00	Using index; Using where; Full scan on NULL key
 Warnings:
-Note	1003	/* select#1 */ select `test`.`t1`.`s1` AS `s1`,!<expr_cache><`test`.`t1`.`s1`>(<in_optimizer>(`test`.`t1`.`s1`,<exists>(<index_lookup>(<cache>(`test`.`t1`.`s1`) in t2 on s1 checking NULL having trigcond(`test`.`t2`.`s1` is null))))) AS `s1 <> ALL (SELECT s1 FROM t2)` from `test`.`t1`
+Note	1003	/* select#1 */ select `test`.`t1`.`s1` AS `s1`,!<expr_cache><`test`.`t1`.`s1`>(<in_optimizer>(`test`.`t1`.`s1`,<exists>(<index_lookup>(<cache>(`test`.`t1`.`s1`) in t2 on s1 checking NULL where trigcond(<cache>(`test`.`t1`.`s1`) = `test`.`t2`.`s1` or `test`.`t2`.`s1` is null) having trigcond(`test`.`t2`.`s1` is null))))) AS `s1 <> ALL (SELECT s1 FROM t2)` from `test`.`t1`
 explain extended select s1, s1 NOT IN (SELECT s1 FROM t2 WHERE s1 < 'a2') from t1;
 id	select_type	table	type	possible_keys	key	key_len	ref	rows	filtered	Extra
 1	PRIMARY	t1	index	NULL	s1	6	NULL	3	100.00	Using index
-2	SUBQUERY	t2	index_subquery	s1	s1	6	func	2	50.00	Using index; Using where; Full scan on NULL key
+2	DEPENDENT SUBQUERY	t2	index_subquery	s1	s1	6	func	2	50.00	Using index; Using where; Full scan on NULL key
 Warnings:
-Note	1003	/* select#1 */ select `test`.`t1`.`s1` AS `s1`,!<expr_cache><`test`.`t1`.`s1`>(<in_optimizer>(`test`.`t1`.`s1`,<exists>(<index_lookup>(<cache>(`test`.`t1`.`s1`) in t2 on s1 checking NULL where `test`.`t2`.`s1` < 'a2' having trigcond(`test`.`t2`.`s1` is null))))) AS `s1 NOT IN (SELECT s1 FROM t2 WHERE s1 < 'a2')` from `test`.`t1`
+Note	1003	/* select#1 */ select `test`.`t1`.`s1` AS `s1`,!<expr_cache><`test`.`t1`.`s1`>(<in_optimizer>(`test`.`t1`.`s1`,<exists>(<index_lookup>(<cache>(`test`.`t1`.`s1`) in t2 on s1 checking NULL where `test`.`t2`.`s1` < 'a2' and trigcond(<cache>(`test`.`t1`.`s1`) = `test`.`t2`.`s1` or `test`.`t2`.`s1` is null) having trigcond(`test`.`t2`.`s1` is null))))) AS `s1 NOT IN (SELECT s1 FROM t2 WHERE s1 < 'a2')` from `test`.`t1`
 drop table t1,t2;
 create table t2 (a int, b int not null);
 create table t3 (a int);
@@ -3275,7 +3275,7 @@ INSERT INTO t2 VALUES (1),(2),(3);
 EXPLAIN SELECT a, a IN (SELECT a FROM t1) FROM t2;
 id	select_type	table	type	possible_keys	key	key_len	ref	rows	Extra
 1	PRIMARY	t2	ALL	NULL	NULL	NULL	NULL	3	
-2	SUBQUERY	t1	index_subquery	a	a	5	func	3	Using index; Full scan on NULL key
+2	DEPENDENT SUBQUERY	t1	index_subquery	a	a	5	func	3	Using index; Using where; Full scan on NULL key
 SELECT a, a IN (SELECT a FROM t1) FROM t2;
 a	a IN (SELECT a FROM t1)
 1	1
@@ -5813,7 +5813,7 @@ SELECT * FROM t1
 WHERE EXISTS (SELECT a FROM t2 WHERE t2.a = t1.a);
 id	select_type	table	type	possible_keys	key	key_len	ref	rows	Extra
 1	PRIMARY	t1	ALL	NULL	NULL	NULL	NULL	4	Using where
-2	DEPENDENT SUBQUERY	t2	index_subquery	idx	idx	5	func	58	Using index
+2	SUBQUERY	t2	index_subquery	idx	idx	5	func	58	Using index
 DROP TABLE t1,t2;
 #
 # BUG#752992: Wrong results for a subquery with 'semijoin=on'
@@ -6755,7 +6755,7 @@ SET @@optimizer_switch='semijoin=off,materialization=off,in_to_exists=on,subquer
 EXPLAIN SELECT * FROM t1 WHERE a IN (SELECT a AS field1 FROM t1 GROUP BY field1);
 id	select_type	table	type	possible_keys	key	key_len	ref	rows	Extra
 1	PRIMARY	t1	index	NULL	a	4	NULL	2	Using where; Using index
-2	DEPENDENT SUBQUERY	t1	index_subquery	a	a	4	func	1	Using index
+2	SUBQUERY	t1	index_subquery	a	a	4	func	1	Using index
 SELECT * FROM t1 WHERE a IN (SELECT a AS field1 FROM t1 GROUP BY field1);
 a
 2009-01-01
--- a/mysql-test/main/subselect_sj.result
+++ b/mysql-test/main/subselect_sj.result
@@ -82,7 +82,7 @@ id	select_type	table	type	possible_keys	key	key_len	ref	rows	filtered	ExtrA
 1	PRIMARY	t1	ALL	NULL	NULL	NULL	NULL	3	100.00	
 1	PRIMARY	A	ALL	NULL	NULL	NULL	NULL	3	100.00	Using where
 1	PRIMARY	B	ALL	NULL	NULL	NULL	NULL	3	100.00	Using where
-2	DEPENDENT SUBQUERY	t10	unique_suBquery	PRIMARY	PRIMARY	4	func	1	100.00	Using index
+2	SUBQUERY	t10	unique_suBquery	PRIMARY	PRIMARY	4	func	1	100.00	Using index
 Warnings:
 Note	1003	/* select#1 */ select `test`.`t1`.`A` AS `A`,`test`.`t1`.`B` AS `B`,`test`.`A`.`A` AS `A`,`test`.`A`.`B` AS `B`,`test`.`B`.`A` AS `A`,`test`.`B`.`B` AS `B` from `test`.`t1` left join (`test`.`t2` `A` join `test`.`t2` `B`) on(`test`.`A`.`A` = `test`.`t1`.`A` And <in_optimizer>(`test`.`B`.`A`,<exists>(<primAry_index_lookup>(<cAche>(`test`.`B`.`A`) in t10 on PRIMARY)))) where 1
 t2 should be wrapped into OJ-nest, so we have "t1 LJ (t2 J t10)"
@@ -91,7 +91,7 @@ select * from t1 left join t2 on (t2.A= t1.A And t2.A in (select pk from t10));
 id	select_type	table	type	possible_keys	key	key_len	ref	rows	filtered	ExtrA
 1	PRIMARY	t1	ALL	NULL	NULL	NULL	NULL	3	100.00	
 1	PRIMARY	t2	ALL	NULL	NULL	NULL	NULL	3	100.00	Using where
-2	DEPENDENT SUBQUERY	t10	unique_suBquery	PRIMARY	PRIMARY	4	func	1	100.00	Using index
+2	SUBQUERY	t10	unique_suBquery	PRIMARY	PRIMARY	4	func	1	100.00	Using index
 Warnings:
 Note	1003	/* select#1 */ select `test`.`t1`.`A` AS `A`,`test`.`t1`.`B` AS `B`,`test`.`t2`.`A` AS `A`,`test`.`t2`.`B` AS `B` from `test`.`t1` left join `test`.`t2` on(`test`.`t2`.`A` = `test`.`t1`.`A` And <in_optimizer>(`test`.`t1`.`A`,<exists>(<primAry_index_lookup>(<cAche>(`test`.`t2`.`A`) in t10 on PRIMARY)))) where 1
 set @save_join_buffer_size=@@join_buffer_size;
--- a/mysql-test/main/subselect_sj2.result
+++ b/mysql-test/main/subselect_sj2.result
@@ -624,7 +624,7 @@ select * from t1 left join t2 on (t2.a= t1.a and t2.a in (select pk from t3));
 id	select_type	table	type	possible_keys	key	key_len	ref	rows	Extra
 1	PRIMARY	t1	ALL	NULL	NULL	NULL	NULL	3	
 1	PRIMARY	t2	ALL	NULL	NULL	NULL	NULL	3	Using where
-2	DEPENDENT SUBQUERY	t3	unique_subquery	PRIMARY	PRIMARY	4	func	1	Using index
+2	SUBQUERY	t3	unique_subquery	PRIMARY	PRIMARY	4	func	1	Using index
 drop table t0, t1, t2, t3;
 create table t1 (a int);
 insert into t1 values (0),(1),(2),(3),(4),(5),(6),(7),(8),(9);
--- a/mysql-test/main/subselect_sj2_jcl6.result
+++ b/mysql-test/main/subselect_sj2_jcl6.result
@@ -632,7 +632,7 @@ select * from t1 left join t2 on (t2.a= t1.a and t2.a in (select pk from t3));
 id	select_type	table	type	possible_keys	key	key_len	ref	rows	Extra
 1	PRIMARY	t1	ALL	NULL	NULL	NULL	NULL	3	
 1	PRIMARY	t2	hash_ALL	NULL	#hash#$hj	5	test.t1.a	3	Using where; Using join buffer (flat, BNLH join)
-2	DEPENDENT SUBQUERY	t3	unique_subquery	PRIMARY	PRIMARY	4	func	1	Using index
+2	SUBQUERY	t3	unique_subquery	PRIMARY	PRIMARY	4	func	1	Using index
 drop table t0, t1, t2, t3;
 create table t1 (a int);
 insert into t1 values (0),(1),(2),(3),(4),(5),(6),(7),(8),(9);
--- a/mysql-test/main/subselect_sj2_mat.result
+++ b/mysql-test/main/subselect_sj2_mat.result
@@ -626,7 +626,7 @@ select * from t1 left join t2 on (t2.a= t1.a and t2.a in (select pk from t3));
 id	select_type	table	type	possible_keys	key	key_len	ref	rows	Extra
 1	PRIMARY	t1	ALL	NULL	NULL	NULL	NULL	3	
 1	PRIMARY	t2	ALL	NULL	NULL	NULL	NULL	3	Using where
-2	DEPENDENT SUBQUERY	t3	unique_subquery	PRIMARY	PRIMARY	4	func	1	Using index
+2	SUBQUERY	t3	unique_subquery	PRIMARY	PRIMARY	4	func	1	Using index
 drop table t0, t1, t2, t3;
 create table t1 (a int);
 insert into t1 values (0),(1),(2),(3),(4),(5),(6),(7),(8),(9);
--- a/mysql-test/main/subselect_sj_jcl6.result
+++ b/mysql-test/main/subselect_sj_jcl6.result
@@ -93,7 +93,7 @@ id	select_type	table	type	possible_keys	key	key_len	ref	rows	filtered	ExtrA
 1	PRIMARY	t1	ALL	NULL	NULL	NULL	NULL	3	100.00	
 1	PRIMARY	A	ALL	NULL	NULL	NULL	NULL	3	100.00	Using where; Using join Buffer (flAt, BNL join)
 1	PRIMARY	B	ALL	NULL	NULL	NULL	NULL	3	100.00	Using where; Using join Buffer (incrementAl, BNL join)
-2	DEPENDENT SUBQUERY	t10	unique_suBquery	PRIMARY	PRIMARY	4	func	1	100.00	Using index
+2	SUBQUERY	t10	unique_suBquery	PRIMARY	PRIMARY	4	func	1	100.00	Using index
 Warnings:
 Note	1003	/* select#1 */ select `test`.`t1`.`A` AS `A`,`test`.`t1`.`B` AS `B`,`test`.`A`.`A` AS `A`,`test`.`A`.`B` AS `B`,`test`.`B`.`A` AS `A`,`test`.`B`.`B` AS `B` from `test`.`t1` left join (`test`.`t2` `A` join `test`.`t2` `B`) on(`test`.`A`.`A` = `test`.`t1`.`A` And <in_optimizer>(`test`.`B`.`A`,<exists>(<primAry_index_lookup>(<cAche>(`test`.`B`.`A`) in t10 on PRIMARY)))) where 1
 t2 should be wrapped into OJ-nest, so we have "t1 LJ (t2 J t10)"
@@ -102,7 +102,7 @@ select * from t1 left join t2 on (t2.A= t1.A And t2.A in (select pk from t10));
 id	select_type	table	type	possible_keys	key	key_len	ref	rows	filtered	ExtrA
 1	PRIMARY	t1	ALL	NULL	NULL	NULL	NULL	3	100.00	
 1	PRIMARY	t2	ALL	NULL	NULL	NULL	NULL	3	100.00	Using where; Using join Buffer (flAt, BNL join)
-2	DEPENDENT SUBQUERY	t10	unique_suBquery	PRIMARY	PRIMARY	4	func	1	100.00	Using index
+2	SUBQUERY	t10	unique_suBquery	PRIMARY	PRIMARY	4	func	1	100.00	Using index
 Warnings:
 Note	1003	/* select#1 */ select `test`.`t1`.`A` AS `A`,`test`.`t1`.`B` AS `B`,`test`.`t2`.`A` AS `A`,`test`.`t2`.`B` AS `B` from `test`.`t1` left join `test`.`t2` on(`test`.`t2`.`A` = `test`.`t1`.`A` And <in_optimizer>(`test`.`t1`.`A`,<exists>(<primAry_index_lookup>(<cAche>(`test`.`t2`.`A`) in t10 on PRIMARY)))) where 1
 set @save_join_buffer_size=@@join_buffer_size;
--- a/mysql-test/main/unique.result
+++ b/mysql-test/main/unique.result
@@ -7,3 +7,25 @@ CREATE TABLE t2 (n BLOB, UNIQUE(n));
 INSERT INTO t2 VALUES (1);
 DELETE FROM t2 WHERE n = 1;
 DROP TABLE t2;
+#
+# Beginning of 11.4 tests
+#
+#
+# MDEV-36389
+#
+CREATE TABLE t1 (c1 TEXT, UNIQUE (c1(1)));
+INSERT INTO t1 (c1) VALUES ('a');
+SELECT c1 FROM t1 WHERE ('abc' IN (SELECT c1 FROM t1)) IS FALSE;
+c1
+a
+DROP TABLE t1;
+CREATE TABLE t0 (c1 text not null);
+insert into t0 values ('abc'),('abc');
+CREATE TABLE t1 (c1 TEXT, UNIQUE (c1(1))) engine=myisam;
+INSERT INTO t1 (c1) VALUES ('a'),('b'),('c');
+SELECT c1, c1 IN (SELECT c1 FROM t1) FROM t0;
+c1	c1 IN (SELECT c1 FROM t1)
+abc	0
+abc	0
+DROP TABLE t0, t1;
+# End of 11.4 tests
--- a/mysql-test/main/unique.test
+++ b/mysql-test/main/unique.test
@@ -20,3 +20,26 @@ CREATE TABLE t2 (n BLOB, UNIQUE(n));
 INSERT INTO t2 VALUES (1);
 DELETE FROM t2 WHERE n = 1;
 DROP TABLE t2;
+
+
+--echo #
+--echo # Beginning of 11.4 tests
+--echo #
+
+--echo #
+--echo # MDEV-36389
+--echo #
+
+CREATE TABLE t1 (c1 TEXT, UNIQUE (c1(1)));
+INSERT INTO t1 (c1) VALUES ('a');
+SELECT c1 FROM t1 WHERE ('abc' IN (SELECT c1 FROM t1)) IS FALSE;
+DROP TABLE t1;
+
+CREATE TABLE t0 (c1 text not null);
+insert into t0 values ('abc'),('abc');
+CREATE TABLE t1 (c1 TEXT, UNIQUE (c1(1))) engine=myisam;
+INSERT INTO t1 (c1) VALUES ('a'),('b'),('c');
+SELECT c1, c1 IN (SELECT c1 FROM t1) FROM t0;
+DROP TABLE t0, t1;
+
+--echo # End of 11.4 tests
--- a/mysql-test/suite/gcol/r/gcol_select_myisam.result
+++ b/mysql-test/suite/gcol/r/gcol_select_myisam.result
@@ -1121,7 +1121,7 @@ id	select_type	table	type	possible_keys	key	key_len	ref	rows	Extra
 EXPLAIN SELECT * FROM t2 AS t1 WHERE b NOT IN (SELECT b FROM t1 FORCE INDEX(b));
 id	select_type	table	type	possible_keys	key	key_len	ref	rows	Extra
 1	PRIMARY	t1	system	NULL	NULL	NULL	NULL	1	
-2	SUBQUERY	t1	index_subquery	b	b	5	func	3	Using index; Full scan on NULL key
+2	DEPENDENT SUBQUERY	t1	index_subquery	b	b	5	func	3	Using index; Using where; Full scan on NULL key
 DROP TABLE t1;
 DROP TABLE t2, t3;
 #
--- a/sql/opt_subselect.cc
+++ b/sql/opt_subselect.cc
@@ -463,7 +463,7 @@ static bool remove_sj_conds(THD *thd, Item **tree);
 static bool is_cond_sj_in_equality(Item *item);
 static bool sj_table_is_included(JOIN *join, JOIN_TAB *join_tab);
 static Item *remove_additional_cond(Item* conds);
-static void remove_subq_pushed_predicates(JOIN *join, Item **where);
+static bool can_remove_subq_pushed_predicates(Item *cond);

 enum_nested_loop_state 
 end_sj_materialize(JOIN *join, JOIN_TAB *join_tab, bool end_of_records);
@@ -5719,11 +5719,12 @@ int rewrite_to_index_subquery_engine(JOIN *join)
  {
    if (!join->having)
    {
-      Item *where= join->conds;
      if (join_tab[0].type == JT_EQ_REF &&
 	  join_tab[0].ref.items[0]->name.str == in_left_expr_name.str)
      {
-        remove_subq_pushed_predicates(join, &where);
+        if (can_remove_subq_pushed_predicates(join->conds))
+          join->conds= NULL;
+        Item *where= join->conds;
        save_index_subquery_explain_info(join_tab, where);
        join_tab[0].type= JT_UNIQUE_SUBQUERY;
        join->error= 0;
@@ -5737,7 +5738,9 @@ int rewrite_to_index_subquery_engine(JOIN *join)
      else if (join_tab[0].type == JT_REF &&
 	       join_tab[0].ref.items[0]->name.str == in_left_expr_name.str)
      {
-	remove_subq_pushed_predicates(join, &where);
+	if (can_remove_subq_pushed_predicates(join->conds))
+          join->conds= NULL;
+        Item *where= join->conds;
        save_index_subquery_explain_info(join_tab, where);
        join_tab[0].type= JT_INDEX_SUBQUERY;
        join->error= 0;
@@ -5772,6 +5775,41 @@ int rewrite_to_index_subquery_engine(JOIN *join)
 }


+/*
+  can_remove_ref_or_null
+
+  @param cond the condition from JOIN::conds ultimately
+
+  Indicates to the caller, by returning true, that the condition
+  can be removed from the expression tree.  Cases where we remove
+  the condition:
+    - The condition's name points to the global "<IN COND>" indicating
+      that this is an IN condition.
+    - The condition is an Item_func_trig_cond that wraps an OR
+      condition and the first disjunct of the OR condition satisfies
+      removal conditions of can_remove_subq_pushed_predicates.
+ */
+
+static bool can_remove_ref_or_null(Item *cond)
+{
+  if (cond->name.str != in_additional_cond.str)
+    return false;
+
+  // This must be ref-or-null or Item_func_trig_cond(ref-or-null)
+  Item_func_trig_cond *trg= dynamic_cast<Item_func_trig_cond*>(cond);
+  if (trg)
+    cond= trg->arguments()[0];
+
+  Item_cond_or *or_cond= dynamic_cast<Item_cond_or*>(cond);
+  DBUG_ASSERT(or_cond);
+  if (!or_cond)
+    return false;
+
+  Item *eq_cond= or_cond->argument_list()->head();
+  return can_remove_subq_pushed_predicates(eq_cond);
+}
+
+
 /**
  Remove additional condition inserted by IN/ALL/ANY transformation.

@@ -5783,8 +5821,9 @@ int rewrite_to_index_subquery_engine(JOIN *join)

 static Item *remove_additional_cond(Item* conds)
 {
-  if (conds->name.str == in_additional_cond.str)
+  if (can_remove_ref_or_null(conds))
    return 0;
+
  if (conds->type() == Item::COND_ITEM)
  {
    Item_cond *cnd= (Item_cond*) conds;
@@ -5792,7 +5831,7 @@ static Item *remove_additional_cond(Item* conds)
    Item *item;
    while ((item= li++))
    {
-      if (item->name.str == in_additional_cond.str)
+      if (can_remove_ref_or_null(item))
      {
 	li.remove();
 	if (cnd->argument_list()->elements == 1)
@@ -5809,18 +5848,16 @@ static Item *remove_additional_cond(Item* conds)
  Remove the predicates pushed down into the subquery

  SYNOPSIS
-    remove_subq_pushed_predicates()
-      where   IN  Must be NULL
-              OUT The remaining WHERE condition, or NULL
+    can_remove_subq_pushed_predicates()

  DESCRIPTION
    Given that this join will be executed using (unique|index)_subquery,
    without "checking NULL", remove the predicates that were pushed down
    into the subquery.

-    If the subquery compares scalar values, we can remove the condition that
+    If the subquery compares scalar values, we can unwrap the condition that
    was wrapped into trig_cond (it will be checked when needed by the subquery
-    engine)
+    engine).

    If the subquery compares row values, we need to keep the wrapped
    equalities in the WHERE clause: when the left (outer) tuple has both NULL
@@ -5831,23 +5868,23 @@ static Item *remove_additional_cond(Item* conds)
    TODO: We can remove the equalities that will be guaranteed to be true by the
    fact that subquery engine will be using index lookup. This must be done only
    for cases where there are no conversion errors of significance, e.g. 257
-    that is searched in a byte. But this requires homogenization of the return 
+    that is searched in a byte. But this requires homogenization of the return
    codes of all Field*::store() methods.
 */

-static void remove_subq_pushed_predicates(JOIN *join, Item **where)
+static bool can_remove_subq_pushed_predicates(Item *cond)
 {
-  if (join->conds->type() == Item::FUNC_ITEM &&
-      ((Item_func *)join->conds)->functype() == Item_func::EQ_FUNC &&
-      ((Item_func *)join->conds)->arguments()[0]->type() == Item::REF_ITEM &&
-      ((Item_func *)join->conds)->arguments()[1]->type() == Item::FIELD_ITEM &&
-      test_if_ref (join->conds,
-                   (Item_field *)((Item_func *)join->conds)->arguments()[1],
-                   ((Item_func *)join->conds)->arguments()[0]))
+  if (cond->type() == Item::FUNC_ITEM &&
+      ((Item_func *)cond)->functype() == Item_func::EQ_FUNC &&
+      ((Item_func *)cond)->arguments()[0]->type() == Item::REF_ITEM &&
+      ((Item_func *)cond)->arguments()[1]->type() == Item::FIELD_ITEM &&
+      test_if_ref (cond,
+                   (Item_field *)((Item_func *)cond)->arguments()[1],
+                   ((Item_func *)cond)->arguments()[0]))
  {
-    *where= 0;
-    return;
+    return true;
  }
+  return false;
 }