Hi Gaurav,
thanks for your reply.
i have verified the free space and it shows fine. i can't explain why it is showing wrong path of data file as '/oracle/PDR/112_64/dbs/UNNAMED00210'
please find the output
SQL> select file#,name from v$datafile where file#=210;
FILE#
----------
NAME
--------------------------------------------------------------------------------
210
/oracle/PDR/112_64/dbs/UNNAMED00210
SQL> select file#,name from v$datafile where file#=210;
FILE#
----------
NAME
--------------------------------------------------------------------------------
210
/oracle/PDR/112_64/dbs/UNNAMED00210