ORA-00980:synonym translation is no longer valid

今天要把测试环境DB的数据更新成最新Production环境的数据，期间发生了一些问题：

1.首先从正式环境exp出想要用户的dmp档

2.drop掉测试环境底下相应用户

3.create测试环境底下相应用户

4.imp 正式环境导出的dmp档

5.在测试环境底下explain plan sql时报：ORA-00980: synonym translation is no longer valid

用以下语句查下失效的synonym

select 'drop ' || decode (s.owner, 'PUBLIC', 'public synonym ', 'synonym ' || s.owner || '.') || s.synonym_name || ';' as "Dropping invalid synonyms:" from dba_synonyms s where table_owner not in ('SYSTEM', 'SYS') and db_link is null and not exists (select null from dba_objects o where s.table_owner = o.owner and s.table_name = o.object_name)

发现有个TOAD_PLAN_TABLE的synonym失效，应该是我在砍User的时候，没有把这个同义词相应的砍掉

解决：drop public synonym TOAD_PLAN_TABLE;