Oracle同义词循环链问题解决

1、先查有没有循环的同义词：    select * from dba_synonyms where     table_owner='test' and synonym_name    <>table_name;没有记录    2、再查同义词没有对象的数据库对象：    select * from dba_synonyms where     table_owner='test'     and sysnonym_name in(select a.synonym_name from dba_synonyms a    where a.table_owner='test'    minus    select object_name from user_objects    )    3、把查询出来的结果进行查询表    select * from DRILL_PRESON    如果该同义词没有对应的对象，就会报ora_01775的错误    4、删除这个同义词：    drop public synonym DRILL_PRESON