在PGPLSQL中创建FUCTION在IF条件下有错误

Question

我正在尝试在postgres

CREATE OR REPLACE FUNCTION cms_inventory_proc() 
RETURNS TRIGGER 
AS 
$BODY$
BEGIN 
IF NEW.permanent = 'YES' THEN 
INSERT INTO cms_inventory(id, version, scheme_id, register_num, cms_reference, sensor_id) 
    VALUES (NEW.id, 0, NEW.scheme_id, NEW.register_num, NEW.cms_reference, NEW.sensor_id);
END IF;   
RETURN NEW;
END;
$BODY$
LANGUAGE plpgsql;

错误中创建函数：在“如果”或附近的语法错误 第9行：如果新的

。