Add information to the byte to clob column

Hi all

We need to change a CLOB column with 160 bytes of data that are added based on binary data, that is added before the actual binary data
The information to be appended is Personid (NUMBER), (CHAR) type of the Image and Image Code (CHAR)

160 bytes-
1 - 0x00
2-21: equivalent PersonID byte (length = 20). For personid, only 9 bytes to use remaining should be defined as 0x00
22-24: Image type equivalent byte (length = 3). If the type of image length less than 3, as 0x00
25-28: equivalent byte Image Code (length = 4). If the image length less than 4 code, set it as 0x00
29-160 - 0x00

Is it possible through PL/SQL or only application level we can achieve this?

Env: Oracle 11.1.0.6 SE

Thank you
Arun

Not sure where you have all your values, but in principle he would like something as

declare
  cursor c_idb_image
  is
    select dl.lob_data d, dl.lob_id id, .....
      from itf.dxf_lob dl, system.conv_temp t
     where dl.lob_id = t.psr_roll_lob_id
       and dl.lob_id = t.psr_slap_lob_id
       and dl_lob_id = t.qrf_roll_lob_id;

  prepend_blob   blob;
begin
  dbms_lob.createtemporary (prepend_blob, true);

  for c in c_idb_image
  loop
    dbms_lob.append (prepend_blob, utl_raw.cast_to_raw (chr (0)));
    dbms_lob.append (prepend_blob, c.personid);
    dbms_lob.append (prepend_blob, c.imagetype);
    dbms_lob.append (prepend_blob, c.imagecode);
    dbms_lob.append (prepend_blob, utl_raw.cast_to_raw (rpad (chr (0), 132, chr (0))));
    dbms_lob.append (prepend_blob, c.lob_data);

    insert into idb.idb_image_fp
         values (id.nextval, c.image_type, c.image_code, c.revision_no, c.datetime_create, prepend_blob);
  end loop;
end;
/

Tags: Database

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