MariaDB User Define Variable throws warning if it is empty
After bit of R&amp;D found below answer AND FIND_IN_SET works fine.

SET @some_var=''; 
SET @some_var:=(SELECT sids 
  FROM fsettings 
 WHERE cid=1 
   AND tid=9 
   AND tp=1 
   AND IsDelete=0); 

SELECT name 
  FROM `tlivewsts` 
 WHERE FIND_IN_SET(id ,@some_var )
 ORDER BY FIND_IN_SET(id ,@some_var );


I hope this solution is useful to some needy like me :)