How can i concat the values in MySql? - mysql

Question

Please find the below code, The below code is sql server code[Stored Procedure] i am converting sql to mysql in this link mysql and below is the sql SP
USE databasename
GO
ALTER PROCEDURE GetSbsberIDbyDept
#P_DepartmentIds varchar(max),
#OP_ID varchar(max) output
AS
BEGIN
Declare #Position int
Declare #length int
Declare #value varchar(8000)
Declare #SubscribrIDs varchar(max)
Declare #FinalSubscriberids varchar(max) = ''
SET #Position = 0
SET #length = 0
select #P_DepartmentIds
WHILE CHARINDEX(',', #P_DepartmentIds, #Position+1)>0
BEGIN
set #Length = CHARINDEX(',', #P_DepartmentIds, #Position+1) - #Position
set #value = SUBSTRING(#P_DepartmentIds, #Position, #length)
select #SubscribrIDs = STUFF((SELECT ', ' + cast(SubscriberId as varchar(max)) from SbsberDetails
where Deptid = #value and ParentId is null order by SubscriberId asc FOR XML PATH(''), TYPE).value('.', 'NVARCHAR(MAX)') ,1,2,'')
if(#SubscribrIDs is not null)
begin
set #FinalSubscriberids += cast(#SubscribrIDs as varchar(max)) + ',';
end
set #Position = CHARINDEX(',', #P_DepartmentIds, #Position + #length) +1
END
SET #OP_ID = #FinalSubscriberids
END
And i converted to MySql but i am getting the error in STUFF statement like STUFF is not valid input at this position, below is the Mysql code
USE databasename
DELIMITER //
CREATE PROCEDURE GetSbsberIDbyDept(
p_P_DepartmentIds longtext,
p_OP_ID out longtext )
BEGIN
Declare v_Position int;
Declare v_length int;
Declare v_value varchar(8000);
Declare v_SubscribrIDs longtext;
Declare v_FinalSubscriberids longtext Default '';
SET v_Position = 0;
SET v_length = 0;
select p_P_DepartmentIds
WHILE; CHARINDEX(',', p_P_DepartmentIds, v_Position+1)>0
BEGIN
set v_length = CHARINDEX(',', p_P_DepartmentIds, v_Position+1) - v_Position;
set v_value = SUBSTRING(p_P_DepartmentIds, v_Position, v_length);
set v_SubscribrIDs = STUFF((SELECT Concat(', ' , cast(SubscriberId as longtext)) from SbsberDetails
where Deptid = v_value and ParentId is null order by SubscriberId asc FOR XML; PATH(''), TYPE).value('.', 'NVARCHAR(MAX)') ,1,2,'')
if(v_SubscribrIDs is not null)
then
set v_FinalSubscriberids += concat(cast(v_SubscribrIDs as longtext) , ',');
end if;
set v_Position = CHARINDEX(',', p_P_DepartmentIds, v_Position + v_length) +1;
END;
SET p_OP_ID = v_FinalSubscriberids;
END;
//
DELIMITER ;
How do i convert the above sql code to MySql?

Answer 1

STUFF is SQL server function so it's thrown error in mysql, The thing that i got your are trying to row concat but in mysql there is funtion name GROUP_CONCAT for group cancating ,so you can use it instead of stuff