How to replace a part of BLOB(XML)

Question

Hi.
I would like to know how replace a part of BLOB.
For example, I have this code
<inscSufDestinatario>999999999</inscSufDestinatario>
<ufDestino>MG</ufDestino>
<ufOrigem>SP</ufOrigem>
<qtdeNF>#1</qtdeNF>
<notasFiscais>
and I need replace the "#1" for "5" or "10" and store him again in a blob.
I wait have been clear.
Tks

Answer 1

For sufficently small blobs you can work with utl_raw package.
Furthermore assuming you are working with real xml files you can do
SQL> with t as (
  select to_blob(utl_raw.cast_to_raw('<xml><inscSufDestinatario>999999999</inscSufDestinatario>
<ufDestino>MG</ufDestino>
<ufOrigem>SP</ufOrigem>
<qtdeNF>#1</qtdeNF>
<notasFiscais/></xml>')) bl from dual
select bl,
to_blob(utl_raw.cast_to_raw(updatexml(xmltype(utl_raw.cast_to_varchar2(bl)), '//qtdeNF/text()','#5').getstringval())) new_bl
from t
BL                                       NEW_BL                                 
<xml><inscSufDestinatario>999999999</ins <xml><inscSufDestinatario>999999999</ins
cSufDestinatario>                        cSufDestinatario><ufDestino>MG</ufDestin
<ufDestino>MG</ufDestino>                o><ufOrigem>SP</ufOrigem><qtdeNF>#5</qtd
<ufOrigem>SP</ufOrigem>                  eNF><notasFiscais/></xml>              
<qtdeNF>#1</qtdeNF>                  
<notasFiscais/></xml>                  
1 row selected.