检查其他表、视图、函数等有无重复定义过同义词

select * 
   from all_synonyms 
   where table_owner = 'HD40' 
     and synonym_name not like '%/%' and SYNONYM_name LIKE '%VENDORAPPLY%'
     and table_name not in (
       select object_name from user_objects
         where object_type in (  -- 定义不在查询范围内的Type
           'TABLE', 'VIEW', 'SEQUENCE',
           'PROCEDURE', 'FUNCTION', 'TYPE'
         )
);

如果是创建包体，检查包体中引用的函数、其他包头定义的公共方法是否有被定义

如果在包体中用了其他包的包头的方法，且这个包头并未被定义，也会出现循环同义词链