Different results with record_cond_statistics=on and record_cond_statistics=off with SOME subquery

CREATE TABLE t1 (i1 INT) ENGINE=MyISAM;

INSERT INTO t1 VALUES (9),(8);

CREATE TABLE t2 (id2 INT, i2 INT) ENGINE=MyISAM;

INSERT INTO t2 VALUES (1,5),(2,6);

CREATE TABLE t3 (pk3 INT PRIMARY KEY, i3 INT) ENGINE=MyISAM;

INSERT INTO t3 VALUES (1,0),(2,6);

SELECT * FROM t1 AS outer_t1, t2, t3 

WHERE pk3 = id2 AND i2 < SOME ( SELECT i1 FROM t1 WHERE i1 < outer_t1.i1 );

SET optimizer_switch='record_cond_statistics=on';

SELECT * FROM t1 AS outer_t1, t2, t3 

WHERE pk3 = id2 AND i2 < SOME ( SELECT i1 FROM t1 WHERE i1 < outer_t1.i1 );

SELECT * FROM t1 AS outer_t1, t2, t3 

WHERE pk3 = id2 AND i2 < SOME ( SELECT i1 FROM t1 WHERE i1 < outer_t1.i1 );

i1	id2	i2	pk3	i3

9	1	5	1	0

9	2	6	2	6

SET optimizer_switch='record_cond_statistics=on';

SELECT * FROM t1 AS outer_t1, t2, t3 

WHERE pk3 = id2 AND i2 < SOME ( SELECT i1 FROM t1 WHERE i1 < outer_t1.i1 );

i1	id2	i2	pk3	i3

9	1	5	1	0

8	1	5	1	0

9	2	6	2	6

8	2	6	2	6

id	select_type	table	type	possible_keys	key	key_len	ref	rows	filtered	Extra

1	PRIMARY	outer_t1	ALL	NULL	NULL	NULL	NULL	2	100.00	

1	PRIMARY	t2	ALL	NULL	NULL	NULL	NULL	2	100.00	Using where; Subqueries: 2; Using join buffer (flat, BNL join)

1	PRIMARY	t3	eq_ref	PRIMARY	PRIMARY	4	test.t2.id2	1	100.00	

2	DEPENDENT SUBQUERY	t1	ALL	NULL	NULL	NULL	NULL	2	100.00	Using where

Warnings:

Note	1276	Field or reference 'test.outer_t1.i1' of SELECT #2 was resolved in SELECT #1

Note	1003	select `test`.`outer_t1`.`i1` AS `i1`,`test`.`t2`.`id2` AS `id2`,`test`.`t2`.`i2` AS `i2`,`test`.`t3`.`pk3` AS `pk3`,`test`.`t3`.`i3` AS `i3` from `test`.`t1` `outer_t1` join `test`.`t2` join `test`.`t3` where ((`test`.`t3`.`pk3` = `test`.`t2`.`id2`) and <nop>(<expr_cache><`test`.`t2`.`i2`,`test`.`outer_t1`.`i1`>(<in_optimizer>(`test`.`t2`.`i2`,<exists>(select `test`.`t1`.`i1` from `test`.`t1` where ((`test`.`t1`.`i1` < `test`.`outer_t1`.`i1`) and trigcond(((<cache>(`test`.`t2`.`i2`) < `test`.`t1`.`i1`) or isnull(`test`.`t1`.`i1`)))) having trigcond(<is_not_null_test>(`test`.`t1`.`i1`)))))))

id	select_type	table	type	possible_keys	key	key_len	ref	rows	filtered	Extra

1	PRIMARY	outer_t1	ALL	NULL	NULL	NULL	NULL	2	100.00	

1	PRIMARY	t2	ALL	NULL	NULL	NULL	NULL	2	100.00	Using where; Subqueries: 2; Using join buffer (flat, BNL join)

1	PRIMARY	t3	eq_ref	PRIMARY	PRIMARY	4	test.t2.id2	1	100.00	Using where

2	DEPENDENT SUBQUERY	t1	ALL	NULL	NULL	NULL	NULL	2	100.00	Using where

Warnings:

Note	1276	Field or reference 'test.outer_t1.i1' of SELECT #2 was resolved in SELECT #1

Note	1003	select `test`.`outer_t1`.`i1` AS `i1`,`test`.`t2`.`id2` AS `id2`,`test`.`t2`.`i2` AS `i2`,`test`.`t3`.`pk3` AS `pk3`,`test`.`t3`.`i3` AS `i3` from `test`.`t1` `outer_t1` join `test`.`t2` join `test`.`t3` where ((`test`.`t3`.`pk3` = `test`.`t2`.`id2`) and <nop>(<expr_cache><`test`.`t2`.`i2`,`test`.`outer_t1`.`i1`>(<in_optimizer>(`test`.`t2`.`i2`,<exists>(select `test`.`t1`.`i1` from `test`.`t1` where ((`test`.`t1`.`i1` < `test`.`outer_t1`.`i1`) and trigcond(((<cache>(`test`.`t2`.`i2`) < `test`.`t1`.`i1`) or isnull(`test`.`t1`.`i1`)))) having trigcond(<is_not_null_test>(`test`.`t1`.`i1`)))))))