11GR2 role separation causes dba_views to fail

From: John Hallas <John.Hallas_at_morrisonsplc.co.uk>
Date: Thu, 3 May 2012 14:31:43 +0100
Message-ID: <EC65ECF8123FEE4D8FC5B212637C3040012D4076C526_at_EXCH1.morrisonsplc.co.uk>

If anybody is interested in helping me with run a test case that indicates that access to V$views is random depending on what is in the buffer cache no matter what user privileges are provided then can they drop me a mail please and I will send a test case. It does not appear to fail on linux but it does on HPUX (11:31) 11GR2 - all versions Some teasers are below

Select username from dba_users;                 - success
Select tablespace_name from dba_tablespaces     - success
Select file_name from dba_data_files            - success

The select from the dba views is successful, as the data has been cached.

Flush the shared pool

SQL> alter system flush shared_pool;

System altered.

SQL> SQL> select username from dba_users;
select username from dba_users

                     *

ERROR at line 1:

ORA-00604: error occurred at recursive SQL level 2
ORA-01115: IO error reading block from file  (block # )
ORA-01110: data file 1: '+DATA/dbatest/datafile/system.269.781706107'
ORA-15081: failed to submit an I/O operation to a disk

Thanks

John

DBA Team Leader
Wm Morrison Supermarkets PLC
Tel 0845 611 4589 Mob: 07876 790540
E-mail: john.hallas_at_morrisonsplc.co.uk

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Received on Thu May 03 2012 - 08:31:43 CDT