ช่วยแนะนำการแก้ไข Error การเรียกใช้ Function MySQL ในการเรียกใช้ Collection TIS620 ด้วยครับ

DELIMITER @@
CREATE FUNCTION RepSpialChar(Instr Text)
RETURNS Text
BEGIN
			DECLARE Outstr Text;
			SET Outstr=REPLACE(Instr,'!',' ');
			SET Outstr=REPLACE(Instr,'#',' ');
			SET Outstr=REPLACE(Instr,'$',' ');
			SET Outstr=REPLACE(Instr,'%',' ');
			SET Outstr=REPLACE(Instr,'&',' ');
			SET Outstr=REPLACE(Instr,'(',' ');
			SET Outstr=REPLACE(Instr,')',' ');
			SET Outstr=REPLACE(Instr,'*',' ');
			SET Outstr=REPLACE(Instr,'+',' ');
			SET Outstr=REPLACE(Instr,',',' ');
			SET Outstr=REPLACE(Instr,'.',' ');
			SET Outstr=REPLACE(Instr,'/',' ');
			SET Outstr=REPLACE(Instr,':',' ');
			SET Outstr=REPLACE(Instr,';',' ');
			SET Outstr=REPLACE(Instr,'<',' ');
			SET Outstr=REPLACE(Instr,'=',' ');
			SET Outstr=REPLACE(Instr,'>',' ');
			SET Outstr=REPLACE(Instr,'?',' ');
			SET Outstr=REPLACE(Instr,'@',' ');
			SET Outstr=REPLACE(Instr,'[',' ');
			SET Outstr=REPLACE(Instr,']',' ');
			SET Outstr=REPLACE(Instr,'^',' ');
			SET Outstr=REPLACE(Instr,'_',' ');
			SET Outstr=REPLACE(Instr,'`',' ');
			SET Outstr=REPLACE(Instr,'{',' ');
			SET Outstr=REPLACE(Instr,'|',' ');
			SET Outstr=REPLACE(Instr,'}',' ');
			SET Outstr=REPLACE(Instr,'~',' ');
			SET Outstr=REPLACE(Instr,'‘',' ');
			                     SET Outstr=REPLACE(Instr,'ฯ',' ');
			SET Outstr=REPLACE(Instr,'',' ');
			                     SET Outstr=REPLACE(Instr,'฿',' ');
RETURN Outstr;
END@@
DELIMITER ;