How to solve this problem truncate incorrect double

Question

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when i am executing my stored procedure in mysql i am getting below error .i am stuck since an hour how to solve this please help me thanks in advance.

Error Code: 1292. Truncated incorrect DOUBLE value: 'REG

What I have tried:

SQL

CREATE DEFINER=`root`@`localhost` PROCEDURE `insert100records`()
begin 
 DECLARE i INT DEFAULT 1;
 declare j int;
 declare name varchar(15);
    WHILE i <= 100 
    DO
    set j=20+i;    
	set name='REG' + cast(j AS char(2))+'2017';
	SELECT name;
    SET i = i + 1;
    END WHILE;
end

Posted 5-Oct-17 19:43pm

Member 13153537

Updated 5-Oct-17 20:18pm

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Member 13153537 · Accepted Answer · 2017-10-05T20:18:00

Finally i got the solution thanks. here i changed like this and i got

CREATE DEFINER=`root`@`localhost` PROCEDURE `insert100records`()
begin
DECLARE i INT DEFAULT 1;
declare j int;
declare name varchar(15);
WHILE i <= 100
DO
set j=20+i;
set name=concat('REG',cast(j AS char(2)),'2017');
SELECT name;
SET i = i + 1;
END WHILE;
end