How to compare two PDF files through PLSQL

Question

Hi,
Can any body help that how to compare two PDF files through PLSQL programing and gives the differences as output.
Thanks,

Answer 1

Or simply apply an oracle text index on your pdf column:
SQL>  create table t (id integer primary key, bl blob)
Table created.
SQL>  declare
bf bfile := bfilename('TEMP','b32001.pdf');
bl blob;
begin
dbms_lob.createtemporary(bl,true);
dbms_lob.open(bf,dbms_lob.lob_readonly);
DBMS_LOB.LOADFROMFILE(bl, bf,dbms_lob.getlength(bf));
insert into t values (1,bl);
commit;
dbms_lob.close(bf);
dbms_lob.freetemporary(bl);
end;
PL/SQL procedure successfully completed.
SQL>  create index t_idx on t (bl) indextype is ctxsys.context parameters ('filter ctxsys.auto_filter')
Index created.
SQL>  declare
   mklob   clob;
begin
   ctx_doc.filter ('t_idx', '1', mklob, true);
   dbms_output.put_line (substr (mklob, 1, 250));
   dbms_lob.freetemporary (mklob);
end;
Oracle® Database
Release Notes
11
g
Release 1 (11.1) for Linux
B32001-04
November 2007
This document contains important information that was not included in the
platform-specific or product-specific documentation
PL/SQL procedure successfully completed.This generates a text only version of your pdf and standard text comparison methods can be applied ....