Access the Blob of Table data and save to file local system

I have a table that has a blob column in which most of the regular file types are downloaded and stored.

What is the best/better way to select/query this table and write all of the content of the BLOB in a local file system?

Using oracle 10.2.

Is it possible to sort the batch and save them on my local drive?

Any help is appreciated.

Thank you.

Try to reset the l_pos to 1 for each iteration in your loop of file name:

create or replace procedure save_to_file_third
is
 l_file      utl_file.file_type;
 l_buffer    raw(32767);
 l_amount    binary_integer := 32767;
 l_pos       integer := 1;
 l_blob      blob;
 l_blob_len  integer;
 myfile_name varchar2(250);

 cursor c1 is
  select id from security where file_name1 is not null;

begin

 for i in c1 loop
  -- Get LOB locator
  select file1, file_name1
    into l_blob, myfile_name
    from security
   where id = i.id;

  l_blob_len := dbms_lob.getlength(l_blob);
  l_pos      := 1;  --re-init l_pos var
  -- Open the destination file.
  l_file := utl_file.fopen('MY_FILES', myfile_name, 'wb', 32767);

  -- Read chunks of the BLOB and write them to the file
  -- until complete.
  while l_pos < l_blob_len
  loop
   dbms_lob.read(l_blob, l_amount, l_pos, l_buffer);
   utl_file.put_raw(l_file, l_buffer, true);
   l_pos := l_pos + l_amount;
  end loop;

  -- Close the file.
  utl_file.fclose(l_file);

 end loop;
exception
 when others then
  -- Close the file if something goes wrong.
  if utl_file.is_open(l_file) then
   utl_file.fclose(l_file);
  end if;
  raise;
end save_to_file_third;

Tags: Database

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