select
  FILE_MAP_IDX,                            -- FILE_MAP_IDX NUMBER
  FILE_CFGID,                              -- FILE_CFGID VARCHAR2(256)
  FILE_STATUS,                             -- FILE_STATUS VARCHAR2(7)
  FILE_NAME,                               -- FILE_NAME VARCHAR2(256)
  FILE_TYPE,                               -- FILE_TYPE VARCHAR2(11)
  FILE_STRUCTURE,                          -- FILE_STRUCTURE VARCHAR2(9)
  FILE_SIZE,                               -- FILE_SIZE NUMBER
  FILE_NEXTS,                              -- FILE_NEXTS NUMBER
  LIB_IDX                                  -- LIB_IDX NUMBER
from
  gv$map_file
where
  inst_id = USERENV('Instance')