Hi, It's probably a bug, with caching of non-existence info in dictionary cache: http://blog.tanelpoder.com/2008/08/18/case-study-on-some-rowcache-internals- cached-non-existent-objects-and-a-describe-bug/ Tanel. > -----Original Message----- > From: oracle-l-bounce@xxxxxxxxxxxxx > [mailto:oracle-l-bounce@xxxxxxxxxxxxx] On Behalf Of William Wagman > Sent: 12 December 2008 14:10 > To: oracle-l@xxxxxxxxxxxxx > Subject: ORA-4043 On DBA_* Views If They Are Described In a > Mount Stage > > Greetings, > > I came across something interesting today and I don't > understand what is going on behind the scenes and hope > someone can explain this to me. > > Upon opening a physical standby in read only mode we received > an ORA-4043 upon attempting to query a DBA_ view. The > solution, which works, is to either restart the database or > flush the shared pool. Of course the underlying v$ views can > be queried. I don't understand what is happening here and am > hoping someone can explain to me what is going on behind the scenes. -- //www.freelists.org/webpage/oracle-l