Parameterizing Schema name

[Prasvim]

Hi
I am trying to paramertize schema name.Below procedure is working fine if I have ABCD--another parametre as varchar.But when I add a parameter as timestamp it throws an error.
CREATE PROCEDURE x.SAMPLE_DYN1
(
IN SCHEMA_NAME VARCHAR(50),
IN ABCD VARCHAR(30)
)
SPECIFIC x.SQL0807231538 03300
LANGUAGE SQL
NOT DETERMINISTIC
CALLED ON NULL INPUT
MODIFIES SQL DATA
INHERIT SPECIAL REGISTERS
BEGIN
DECLARE ENO INTEGER DEFAULT 0;
DECLARE ENAME CHAR(50);
DECLARE STMT VARCHAR(500);
DECLARE at_end SMALLINT DEFAULT 0;
DECLARE DYN_STMT VARCHAR(500);

DECLARE EXIT HANDLER FOR SQLEXCEPTION, SQLWARNING, NOT FOUND-------------Exit handler from cursor loop
BEGIN
set at_end =1;
RESIGNAL;
END;

--DECLARE STMT1 STATEMENT;

SET STMT =' SELECT NAME FROM '||SCHEMA_NAME| |'.ZZ_EMPT2 WHERE NO='||ABCD||'' ;


-- EXEC SQL PREPARE S1 FROM :STMT;

PREPARE STMT1 FROM STMT;
BEGIN
--EXECUTE STMT1;
DECLARE C1 CURSOR FOR STMT1;
------ Cursor declaration

OPEN C1;
WHILE (at_end = 0) DO
FETCH C1 INTO ENAME;
SET ENO = ENO +1;
SET DYN_STMT = 'INSERT INTO idm_dev.ZZ_EMPT 3(NO,NAME) VALUES(?,?)';
PREPARE S1 FROM DYN_STMT;
EXECUTE S1 USING ENO,ENAME;

END WHILE;
END;
COMMIT;
END;

Error:
[IBM][CLI Driver][DB2/LINUXX8664] SQL0440N No authorized routine named "||" of type "FUNCTION" having compatible arguments was found. LINE NUMBER=26. SQLSTATE=42884
Please help