数据从mysql中的游标插入为null

Question

我已经创建了一个存储过程，用于从mysql中的游标插入数据。将数据插入表后，它将作为null插入。

CREATE DEFINER=`root`@`localhost` PROCEDURE `Data_Insert_JB_Securities`()
Begin 

declare title varchar(200);
DECLARE V_title varchar(200) DEFAULT "";
DECLARE v_finished INTEGER DEFAULT 0;
DEClARE cursor_JB_Security CURSOR FOR select title from JB_Security_Detials_insert ;
DECLARE CONTINUE HANDLER 
        FOR NOT FOUND SET v_finished = 1;


OPEN cursor_JB_Security;

get_title: LOOP 

FETCH cursor_JB_Security INTO V_title;

IF v_finished = 1 THEN 
 LEAVE get_title;
 END IF;


insert into JB_Security_Detials_test(title)
value(V_title);

END LOOP get_title;

close cursor_JB_Security;

END