db2中在存储过程中写for循环报错--报错-104 42601 SQL语句中遇到非法符号？

CREATE PROCEDURE Concat_names()
LANGUAGE SQL
BEGIN -- Note: implicit cursor manipulation
DECLARE fullname CHAR(140);

   FOR v1 AS SELECT STUDENT_ID,STUDENT_NAME
                   FROM student 
   DO
       SET fullname = v1.STUDENT_ID || ', ' || v1.STUDENT_NAME;
       INSERT INTO student VALUES (9,fullname);
  END FOR;

END;