select TABLESPACE_NAME, -- TABLESPACE_NAME VARCHAR2(30) FILE_ID, -- FILE_ID NUMBER BYTES_USED, -- BYTES_USED NUMBER BLOCKS_USED, -- BLOCKS_USED NUMBER BYTES_FREE, -- BYTES_FREE NUMBER BLOCKS_FREE, -- BLOCKS_FREE NUMBER RELATIVE_FNO -- RELATIVE_FNO NUMBER from GV$TEMP_SPACE_HEADER where inst_id = USERENV('Instance')