Check if CBO stats are locked or stale

Not familiar with DBA_TAB_STATISTICS before. Today happened to find we can check if CBO stats are locked or stale from this view. Here is an example:

SQL> select owner, table_name, last_analyzed, 
     stattype_locked, stale_stats 
     from dba_tab_statistics where stale_stats='YES';
 
OWNER          TABLE_NAME      LAST_ANALYZED       STATT STA
-------------- --------------- ------------------- ----- ---
SYSTEM         BIN$ZInWFVYZa0L 2008-11-16 09:11:58       YES
               gRAAUT46ylg==$0
 
SYSTEM         BIN$ZJEkpLOwbVj 2009-03-07 18:09:05       YES
               gRAAUT46ylg==$0
 
SYS            WRH$_TABLESPACE 2009-04-18 19:35:47       YES
               _STAT
 
SYS            WRH$_OSSTAT     2009-04-18 19:34:56       YES
SYS            WRH$_SYS_TIME_M 2009-04-18 19:35:46       YES
               ODEL
 
SYS            WRH$_SERVICE_WA 2009-04-18 19:35:09       YES
               IT_CLASS
 
SYS            WRH$_FILESTATXS 2009-04-18 19:34:38       YES
SYS            WRH$_SQLSTAT    2009-04-18 19:35:18       YES
SYS            WRH$_SYSTEM_EVE 2009-04-18 19:35:45       YES
               NT
 
SYS            WRH$_WAITSTAT   2009-04-18 19:35:51       YES
SYS            WRH$_LATCH      2009-04-18 19:34:42       YES
SYS            WRH$_LATCH_CHIL 2009-04-18 19:34:48       YES
               DREN
 
SYS            WRH$_LATCH_PARE 2009-04-18 19:34:53       YES
               NT
 
SYS            WRH$_LATCH_MISS 2009-04-18 19:34:52       YES
               ES_SUMMARY
 
SYS            WRH$_DB_CACHE_A 2009-04-18 19:34:33       YES
               DVICE
 
SYS            WRH$_ROWCACHE_S 2009-04-18 19:35:01       YES
               UMMARY
 
SYS            WRH$_SGASTAT    2009-04-18 19:35:10       YES
SYS            WRH$_SYSSTAT    2009-04-18 19:35:44       YES
SYS            WRH$_PARAMETER  2009-04-18 19:34:57       YES
SYS            WRH$_SEG_STAT   2009-04-18 19:35:06       YES
SYS            WRH$_SERVICE_ST 2009-04-18 19:35:09       YES
               AT
 
SYS            WRH$_ACTIVE_SES 2009-04-18 19:34:25       YES
               SION_HISTORY
 
 
22 rows selected.