Can't select from view even though it appears in ALL_VIEWS

Question

Oracle's documentation states that all_views "describes the views accessible to the user":
http://download.oracle.com/docs/cd/B19306_01/server.102/b14237/statviews_2117.htm
DBA_OBJECTS appears in the ALL_VIEWS, yet I get a "table or view does not exist" error when I try to select from it.
Any thoughts on why this is happening?
SQL> SELECT COUNT(1)
  FROM all_views
  WHERE owner = 'SYS'
  AND view_name = 'DBA_OBJECTS'
  COUNT(1)
         1
1 row selected.
SQL> SELECT *
  FROM sys.dba_objects
SELECT *
  FROM sys.dba_objects
Error at line 2
ORA-00942: table or view does not exist

Answer 1

That's not standard behaviour:
DBA >create user u1 identified by u1;
Utente creato.
DBA >grant connect to u1;
Concessione riuscita.
DBA >conn u1/u1
Connesso.
DBA >select count(0) from all_views;
  COUNT(0)
       856
DBA >select view_name from all_views
  2  where view_name like 'DBA%'
  3  or view_name like 'V$%';
VIEW_NAME
DBA_PROCEDURES
DBA_PUBLISHED_COLUMNS
V$OBJECT_USAGE
DBA >select 'select count(*) from '||owner||'.'||view_name||';'
  2  from all_views
  3  where view_name like 'DBA%'
  4  or view_name like 'V$%';
'SELECTCOUNT(*)FROM'||OWNER||'.'||VIEW_NAME||';'
select count(*) from SYS.DBA_PROCEDURES;
select count(*) from SYS.DBA_PUBLISHED_COLUMNS;
select count(*) from SYS.V$OBJECT_USAGE;
DBA >select count(*) from SYS.DBA_PROCEDURES;
  COUNT(*)
      6793
DBA >select count(*) from SYS.DBA_PUBLISHED_COLUMNS;
  COUNT(*)
         0
DBA >select count(*) from SYS.V$OBJECT_USAGE;
  COUNT(*)
         0All the DBA* or V$ visible are also accessible, DBA_OBJECTS is not present in ALL_VIEWS.
There's something strange on your user's priviledges...
Max
[My Italian Oracle blog|http://oracleitalia.wordpress.com/2010/01/02/query-gerarchiche/]