select
  inst_id,                                 -- INST_ID NUMBER
  name_kfenv,                              -- NAME VARCHAR2(256)
  value_kfenv,                             -- VALUE VARCHAR2(256)
  group_kfenv,                             -- GROUP_NUMBER NUMBER
  entnum_kfenv,                            -- ATTRIBUTE_INDEX NUMBER
  entinc_kfenv,                            -- ATTRIBUTE_INCARNATION NUMBER
  decode(                                  -- READ_ONLY VARCHAR2(7)
    readonly_kfenv, 0, 'N', 1, 'Y', 'UNKNOWN') readonly_kfenv,
  decode(                                  -- SYSTEM_CREATED VARCHAR2(7)
    system_kfenv, 0, 'N', 1, 'Y', 'UNKNOWN') system_kfenv 
from
  x$kfenv
where
  hidden_kfenv = 0