Discoverer Queries to find Report Details

How to find the External Table referred in the Query?

SELECT doc_name,
ba_name,
  folder_name,
  user_name,
  ext_table,
  EUL
FROM
  (SELECT d.DOC_name,
    b.ba_name ba_name,
    o.obj_name folder_name,
    o.sobj_ext_table ext_table,
    e.EXP_name item_name,
    UPPER (USR1.user_name) user_name,
    'EUL4_US' EUL
  FROM eul4_us.eul5_objs o
  LEFT JOIN eul4_us.eul5_expressions e
  ON o.obj_id = e.it_obj_id
  LEFT JOIN eul4_us.eul5_elem_xrefs x
  ON e.exp_id = x.ex_to_id
  LEFT JOIN eul4_us.eul5_documents d
  ON d.doc_id = x.ex_from_id
  LEFT JOIN eul4_us.EUL5_ba_obj_links l
  ON l.bol_obj_id = o.obj_id
  LEFT JOIN eul4_us.EUL5_bas b
  ON b.ba_id = l.bol_ba_id
  LEFT JOIN eul4_us.eul5_eul_users EU1
  ON d.DOC_EU_ID + 0 = EU1.eu_id
  LEFT JOIN applsys.fnd_user USR1
  ON SUBSTR (EU1.eu_username, 2) = TO_CHAR (USR1.user_id)
  WHERE b.ba_name LIKE '%'
  --AND upper(e.exp_name) LIKE upper('%')                        --folder item
  --AND upper(b.ba_name) LIKE upper('%Sample BA Name%') --business area
  AND upper(o.obj_name) LIKE upper('%PPER%')                       --folder
-- AND upper(d.doc_name) LIKE upper('%Payroll%Season%')                        --report name
    /*   and (upper(o.SOBJ_ext_table) like  upper('%XXBLOG_MV%')

    )*/
  AND UPPER (USR1.user_name) = 'BIADMIN'
  )
GROUP BY doc_name,
ba_name,
  folder_name,
  user_name,
  ext_table,
  EUL;