UTL_FILE. OPEN_FILE question to check if a file exists and is not empty

Hello

I'm writing a code in 3 separate files are created based on certain conditions of parameter for the call of the extract.
Say that the parameters are NULL, 'A' and 'B '.
When the Null State is passed to the call of the extract then it should create file A and B if the records are found. If this isn't the case, then create empty files.
It is possible that the setting of the extract is just 'A', then it would create a file say no zero and B with file from scratch.
Now when the extract is called with the parameter 'B' and if the file already exists and is not empty then I shouldn't touch/crash with empty folders.
Is there a simple way I can do this to check if a file exists and is not empty?

I use
OPEN_FILE
(gv_utl_file_path
lv_file_name
lv_file_handle
);

Help, please.
Thank you

@OP: no need to open

SQL> declare
  2   lb_file_exist boolean;
  3   ln_size number;
  4   ln_block_size number;
  5  begin
  6   sys.utl_file.fgetattr('TEST_DIR','a.txt',lb_file_exist,ln_size,ln_block_size);
  7   if lb_file_exist then
  8    dbms_output.put_line('a Exists');
  9    dbms_output.put_line(to_char(ln_size));
 10   else
 11    dbms_output.put_line('a Not Exists');
 12   end if;
 13   sys.utl_file.fgetattr('TEST_DIR','b.txt',lb_file_exist,ln_size,ln_block_size);
 14   if lb_file_exist then
 15    dbms_output.put_line('b Exists');
 16    dbms_output.put_line(to_char(ln_size));
 17   else
 18    dbms_output.put_line('b Not Exists');
 19   end if;
 20   sys.utl_file.fgetattr('TEST_DIR','c.txt',lb_file_exist,ln_size,ln_block_size);
 21   if lb_file_exist then
 22    dbms_output.put_line('c Exists');
 23    dbms_output.put_line(to_char(ln_size));
 24   else
 25    dbms_output.put_line('c Not Exists');
 26   end if;
 27  end;
 28  /
a Exists
0
b Exists
3
c Not Exists

PL/SQL procedure successfully completed.

Published by: JAC on March 30, 2012 01:21

Tags: Database

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UTL_FILE. OPEN_FILE question to check if a file exists and is not empty

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