select
own.name owner ,
obj.name obj_name ,
col.name col_name ,
--
hgr.obj# , -- object number
hgr.col# , -- column number
hgr.row# , -- row number (in row cache)
hgr.bucket , -- bucket number
hgr.endpoint , -- endpoint hashed value
hgr.intcol# , -- internal column number
hgr.epvalue , -- endpoint value information
hgr.ep_repeat_count, -- frequency of the endpoint
hgr.epvalue_raw , -- endpoint raw value
hgr.spare1 , --
hgr.spare2 , --
hgr.endpoint_enc -- encrypted endpoint
from
sys.obj$ obj join
sys.user$ own on obj.owner# = own.user# join
sys.col$ col on obj.obj# = col.obj# left join
sys.histgrm$ hgr on col.obj# = hgr.obj# and
col.col# = hgr.intcol#
where
own.name = 'RENE' and
obj.name = 'TQ84_HISTOGRAM_TEST' and
col.name = 'NM'
;
The view "_HISTGRM_DEC" calls dbms_crypto_internal.statsDecryptNum and dbms_crypto_internal.statsDecryptRaw on endpoint_enc and epvalue_raw to decrypt their values, see $ORACLE_HOME/rdbms/admin/catost.sql.