select
  OBJECT_TYPE,                             -- OBJECT_TYPE VARCHAR2(18)
  OBJECT_TYPE_ID,                          -- OBJECT_TYPE_ID NUMBER
  SEGMENT_TYPE_ID,                         -- SEGMENT_TYPE_ID NUMBER
  OBJECT_ID,                               -- OBJECT_ID NUMBER
  HEADER_FILE,                             -- HEADER_FILE NUMBER
  HEADER_BLOCK,                            -- HEADER_BLOCK NUMBER
  TS_NUMBER                                -- TS_NUMBER NUMBER
from
  gv$logmnr_sys_objects
where
  inst_id = userenv('instance')