Writing to an Excel(xlsx,2007 format) using PL/SQL

Question

Hi,
I have a new requirement in which I have to write to an excel ,.xlsx(2007 format). I am using Oracle 9i.
When I try to write it to .xlsx it is writing but when i try to open the file it says "excel 2007 excel cannot open the file because the file format or file extension is not valid".
I am using the following Stored Procedure:
create or replace
procedure myfilewrite( p_location IN varchar2,
p_filename IN varchar2)
IS
v_disk_file utl_file.file_type;
BEGIN
v_disk_file := utl_file.fopen( location => p_location,
filename =>p_filename,
open_mode=>'W');
utl_file.put_line(v_disk_file,'abc'||chr(13));
utl_file.fclose(v_disk_file);
EXCEPTION
when utl_file.invalid_path then
utl_file.fclose(v_disk_file);
raise_application_error(-2001,'path error');
when utl_file.invalid_operation then
utl_file.fclose(v_disk_file);
raise_application_error(-2002,'invalid operation error');
when utl_file.write_error then
utl_file.fclose(v_disk_file);
raise_application_error(-2003,'write error');
when utl_file.invalid_filehandle then
utl_file.fclose(v_disk_file);
raise_application_error(-2004,'filehandler error');
when others then
raise_application_error(-2005,'could not write to file');
END;
Please help me regarding this issue.
Regards,
RAJ

Answer 1

user13529315 wrote:
In the existing application we have been writing into .xls format using utl_file package.No you haven't. You have been writing a file in CSV format that is named with an XLS extension. File name does not equal file format, XLS is a binary format, UTL_FILE cannot write binary files.
CSV - http://en.wikipedia.org/wiki/Comma-separated_values
>
A comma-separated values or character-separated values (CSV) file is a simple text format
>
XLS - http://en.wikipedia.org/wiki/Microsoft_Excel_file_format#File_formats
>
Microsoft Excel up until 2007 version used a proprietary binary file format called Binary Interchange File Format (BIFF) as its primary format.