Oracle - PL-SQL ile Dosya Boyutunu bulma

CREATE OR REPLACE FUNCTION flength (
location_in IN VARCHAR2,
file_in IN VARCHAR2
)
RETURN PLS_INTEGER

IS
TYPE fgetattr_t IS RECORD (
fexists BOOLEAN,
file_length PLS_INTEGER,
block_size PLS_INTEGER
);

fgetattr_rec fgetattr_t;
BEGIN
UTL_FILE.fgetattr (
location => location_in,
filename => file_in,
fexists => fgetattr_rec.fexists,

file_length => fgetattr_rec.file_length,
block_size => fgetattr_rec.block_size
);
RETURN fgetattr_rec.file_length;
END flength;
/