incorrect examined rows in case of stored function usage

CREATE TABLE `tab_MDEV_30820` (

`ID` int(11) NOT NULL AUTO_INCREMENT,

`NAME_F` varchar(50) DEFAULT NULL,

  PRIMARY KEY (`ID`)

);

 CREATE TABLE `tab2` (

  `ID` int(11) NOT NULL AUTO_INCREMENT,

  `TAB1_ID` int(11) DEFAULT NULL,

  PRIMARY KEY (`id`)

);

--delimiter //

CREATE FUNCTION `get_zero`() RETURNS int(11)

BEGIN

    RETURN(0) ;

END

//

for i in 1..100 do insert into tab_MDEV_30820 values (null,'qwerty'); end for ; //

for i in 1..1000 do insert into tab2 values (null,round(rand()*10000)); end for ; //

--delimiter ;

SET @old_slow_query_log= @@global.slow_query_log;

SET @old_log_output= @@global.log_output;

SET @old_long_query_time= @@long_query_time;

SET GLOBAL log_output= "TABLE";

SET GLOBAL slow_query_log= ON;

SET SESSION long_query_time= 0;

SELECT 0 as zero, (SELECT ID FROM tab2 where tab2.TAB1_ID = tab_MDEV_30820.ID LIMIT 1) AS F1 FROM tab_MDEV_30820 ORDER BY 2 DESC LIMIT 2;

SELECT get_zero() as zero, (SELECT ID FROM tab2 where tab2.TAB1_ID = tab_MDEV_30820.ID LIMIT 1) AS F1 FROM tab_MDEV_30820 ORDER BY 2 DESC LIMIT 2;

SELECT rows_examined FROM mysql.slow_log WHERE sql_text LIKE '%SELECT%tab_MDEV_30820%';

## Reset to initial values

SET @@long_query_time= @old_long_query_time;

SET @@global.log_output= @old_log_output;

SET @@global.slow_query_log= @old_slow_query_log;

drop table tab_MDEV_30820, tab2;

drop function get_zero;