Fail to load and read dbms_lob.bfile offset more than 2G

Question

Hi!
Recently I have encountered a strange problem I can't find any mention about.
I load a large file by pieces of 1 Gigabyte. When offset becomes more than 2 Gigabytes (2147483649 bytes for example) I have Exception ORA-22288: file or LOB operation FILEOPEN failed.
(The file about 4G is already loaded.)
declare
p_dir_name varchar2(200) := 'DIR_BLOB_IN' ;
p_file_name varchar2(200) := 'A vid2.avi' ;
v_blob_id integer := 194 ;
v_blob_loc blob;
v_bfile_loc bfile;
v_inc_var integer := 1073741824 ;
v_blob_offset integer := 2147483649 ;
v_bfile_offset integer := 2147483649 ; -- Offset more than 2G - the procedure doesn't work
v_bfile_offset      integer        := 1073741825 ;  Offset = 2G
v_err_message varchar2(200);
v_bfile_is_open boolean := false;
function blob_forupdate (blob_id in integer)
return blob
is
cursor blob_to_open
is
select blob_in_body
from tb_blob_in
where blob_in_id = blob_id
for update;
blob_body blob_to_open%rowtype;
begin
open blob_to_open;
fetch blob_to_open into blob_body;
close blob_to_open;
return blob_body.blob_in_body;
end;
begin
v_blob_loc := blob_forupdate( v_blob_id );
v_bfile_loc := bfilename(p_dir_name, p_file_name);
dbms_output.put_line( 'Opening bfile...' );
dbms_lob.fileopen( v_bfile_loc );
dbms_output.put_line( 'Bfile is open.' );
dbms_lob.loadfromfile( v_blob_loc, v_bfile_loc, v_inc_var, v_blob_offset, v_bfile_offset ); commit;
dbms_output.put_line( 'Closing bfile...' );
dbms_lob.fileclose( v_bfile_loc );
dbms_output.put_line( 'Bfile is closed.' );
exception
when others
then
v_err_message := substr( sqlerrm, 1 , 200);
dbms_output.put_line( 'OTHERS Exception ' || sqlerrm );
v_bfile_is_open := dbms_lob.fileisopen(v_bfile_loc) = 1 ;
if v_bfile_is_open
then
dbms_output.put_line( 'File ''' || p_file_name || ''' in the directory ''' || p_dir_name || ''' is open!' );
dbms_output.put_line( 'Closing it...' );
dbms_lob.fileclose( v_bfile_loc );
dbms_output.put_line( 'The file is closed!' );
else
dbms_output.put_line('File ' || p_file_name || ' in the directory ''' || p_dir_name || ''' closed!' );
end if;
end;
The same story with dbms_lob.read operation:
declare
p_dir_name varchar2(200) := 'DIR_BLOB_IN';
p_file_name varchar2(200) := 'A vid2.avi';
v_bfile_loc bfile;
v_read_amount binary_integer := 10 ;
v_read_offset integer;
v_read_buffer varchar2(20);
v_bfile_is_open boolean := false;
v_message varchar2(200);
begin
dbms_output.put_line( 'File ' || p_file_name || ' in ' || p_dir_name || '' || '' );
v_bfile_loc := bfilename(p_dir_name, p_file_name);
dbms_lob.fileopen( v_bfile_loc );
v_message := 'Offset < 2G: ' ;
dbms_output.put_line( v_message );
v_read_offset := 2000000000; -- offset < 2G
dbms_lob.read( v_bfile_loc, v_read_amount, v_read_offset, v_read_buffer );
dbms_output.put_line( v_message || to_char( v_read_buffer ) );
v_message := 'Offset= 2G: ' ;
dbms_output.put_line( v_message );
v_read_offset := 2147483648; -- offset = 2G
dbms_lob.read( v_bfile_loc, v_read_amount, v_read_offset, v_read_buffer );
dbms_output.put_line( v_message || to_char( v_read_buffer ) );
v_message := 'Offset > 2G: ' ;
dbms_output.put_line( v_message );
v_read_offset := 2147483649; -- offset > 2G
dbms_lob.read( v_bfile_loc, v_read_amount, v_read_offset, v_read_buffer );
dbms_output.put_line( v_message || to_char( v_read_buffer ) );
dbms_lob.fileclose( v_bfile_loc );
exception
when others
then
dbms_output.put_line(sqlerrm);
dbms_output.put_line('The Beginning');
v_bfile_is_open := dbms_lob.fileisopen(v_bfile_loc) = 1 ;
dbms_output.put_line('The End');
if v_bfile_is_open
then dbms_lob.fileclose( v_bfile_loc );
end if;
end;
--END Read from bfile starting with offset
I can load this file as a whole and I can get its length. I can load parts of this file equal or less than 2G into blob with any blob offset I want. But when bfile offset is more than 2 Gigabytes the error occures.
I have an Oracle Database server Release 10.2.0.1.0 on Microsoft Windows XP (Professional Version 2002, Service Pack 3). And I have an Oracle Database 10.2.0.2.0 on Microsoft Windows Server 2003 R2 (Enterprise Edition Service Pack 1) also. It doesn't work on both of them.
I have no Oracle Database on Unix or 64-bit Windows, so I can't test on those operational systems.
Can anybody help me? (( I lost any hope to solve this problem (((
Edited by: Shindou on Feb 17, 2009 4:40 AM

Answer 1

See Mark Drake's (Product Manager Oracle XMLDB, Oracle US) response in this old post: ORA-31167: 64k size limit for XML node
The "in a future release" reference, means that this boundary 64K / node issue, was lifted in 11g and onwards...
So first of all, if not only due to performance improvements, I would strongly suggest to upgrade to a database version which is supported by Oracle, see My Oracle Support... In short Oracle 10.2.x was in extended support up to summer 2013, if I am not mistaken and is currently not supported anymore...
If you are able to able to upgrade, please use the much, much more performing XMLType Securefile Binary XML storage option, instead of the XMLType (Basicfile) CLOB storage option.
HTH